Reproducing apparatus for still image data and audio data

Abstract: An information signal processing apparatus according to the present invention is arranged to receive, as an input, an information signal to temporarily store therein the input information signal and to temporarily store therein management information prepared during a recording of the information signal in the recording medium, thereby recording the temporarily stored information signal and management information in the recording medium. Accordingly, it is possible to record an information signal having a large amount of information in the recording medium without lowering a recording speed and it is also possible to easily reduce the size, weight and cost of the apparatus.

Description: The present invention relates to an information signal processing apparatus for processing an information signal and, more particularly, to an information signal processing apparatus for recording an information signal in a recording medium. From JP-A-3 232 029 and the corresponding Abstract, equivalent to US-5 226 145 is known a storage management system for a memory card used in an electronic still camera which also records audio data, which has a storage area divided into a plurality of storage units that have a predetermined storage capacity, manages storage of information on a storage unit basis. The storage area includes a memory allocation table (MAT) for indicating a relationship of one of the storage units in which a group of mutually associated information is to be stored in the form of a packet, and directory for indicating one of the storage units in which a beginning portion of the packet is to be stored. Stored in one of the storage units is, as a header, management data representative of at least either one of the number of occupied ones of the storage units and the number of idle ones thereof, the header including an error check code for use in detecting error of the management data. EP 0 379 445 shows a disk reproducing apparatus for reproducing still picture video and audio signals recorded in the respective circular tracks on a disk, which each audio signal being time-base compressed and recorded, along with added flag and connection information, in one of a plurality of sectors, into which the respective track is divided. An error in the connecting information added to each of the sectors is detected. A track in which a corresponding still picture video signal is recorded is identified from the connection information added to each of the sectors. The type of each sector is determined, added to the audio signal recorded in the respective sector, and a directory or index table is formed using information as to detected errors, information as to the corresponding picture track and information concerning the sector type. From EP 0 323 194 A2 is known an electronic still camera including an imaging device, a signal conversion device and a recording device. The imaging device includes a solid state imaging unit and optical color filters of different spectral characteristics arranged on the solid state imaging unit to convert photoelectrically converting the photographed image. The signal conversion device converts a signal from the imaging device into a luminance signal and two color difference signals. The recording device stores image information including the luminance signal and two color difference signals into a semiconductor memory card. From EP 0 421 769 A2 is known an electronic still camera designed to record on a memory card an audio signal in addition to an image signal including an imaging device for receiving light from an object and outputting an analog image signal, a first A/D converter means for converting the analog image signal obtained by the imaging device into a digital image signal, a microphone for picking up sound and outputting an analog audio signal, a second A/D conversion means for converting the analog audio signal obtained by the microphone into a digital audio signal, a control means for recording the digital image signal and audio signal onto a memory card which is removably mounted on a camera body, and a semiconductor line memory for storing the digital audio signal. An electronic still video system has heretofore been known as one example of an information signal processing apparatus for processing an information signal. The electronic still video system is arranged to record information signals, such as image signals or sound signals, on a plurality of concentric recording tracks which are formed on a magnetic disk, and to select an arbitrary recording track from among the recording tracks formed on the magnetic disk and reproduce the information signal, such as the image signal or the sound signal, recorded on the selected recording track. Such an electronic still video system is arranged to record the image signals or the sound signals on the recording tracks formed on the magnetic disk, in the state of analog signals. However, a new system has recently been proposed which is arranged to store digitized image signals or sound signals in a memory card including a plurality of RAMs (random access memories) made from semiconductor memory elements such as D-RAMs, S-RAMs or EEP-ROMs. However, the storage capacity of the memory card is limited because of the limited storage capacity per chip of the memory device or the limits of the number of chips of a memory element which can be mounted on a single memory card. Further, since the memory element is more expensive than other recording media, it is presently economically difficult to utilize the memory card as a recording medium of large storage capacity. In contrast, a hard disk unit is known as a recording medium having a larger storage capacity than the memory card, and there has recently been provided a hard disk unit which is removably attachable to an apparatus body similarly to the memory card. If such a hard disk unit is used with an electronic still video camera as a recording medium, it is possible to construct comparatively inexpensively a system having a large storage capacity. Various kinds of hard disk units are provided for various specifications such as recording capacity, weight, power consumption and recording speed. If the system is constructed so that plural kinds of hard disk units can be attached, it is possible to meet a variety of demands of users. The aforesaid system is constructed to record a digitized image signal (i.e., image data) or a digitized sound signal (i.e., sound data) in a recording medium such as the memory card or the hard disk unit in the following manner. The recording area of the recording medium is divided into an information data recording area and a management data recording area, and the image data or the sound data is divided into units each corresponding to what is called "cluster", and each of the units is recorded in one cluster in the information data recording area. Information data indicative of the state of use of each cluster is recorded in the management data recording area. If image data or sound data is to be recorded over a plurality of clusters, during recording of the image data or the sound data, while the position of a cluster in which the image data or the sound data is recorded is being stored in a management data memory provided in a system control circuit, the image data or the sound data is recorded in the information data recording area. After the completion of the recording of the image data or the sound data, the information data indicative of the state of use of each cluster, which is stored in the management data memory provided in the system control circuit, is recorded in the management data recording area. However, if the amount of data of the image data or the sound data to be recorded in the recording medium is increased and the number of clusters used for recording the image data or the sound data is increased for the purpose of recording high-quality-image data or high-quality-sound data, it is necessary to provide a management data memory of large storage capacity within the system control circuit so that the positions of clusters used for recording the image data or the sound data can be stored during the recording of the image data or the sound data. With such an arrangement, it is extremely difficult to reduce the size, weight and cost of the apparatus. On the other hand, if a memory of small storage capacity is used as the management data memory provided within the system control circuit, the size, weight and cost of the system can be reduced. However, the management data memory of small storage capacity does not have a sufficient storage capacity to store the positions of clusters used during recording of the image data or the sound data. Accordingly, the management data memory of small storage capacity needs to repeat the processing of stopping once the operation of recording the image data or the sound data in the information data recording area, reading information data indicative of reading information data, stored in the management data recording area, indicative of the state of use of each cluster, recording the read information data in the management data recording area, and restarting the operation of recording the image data or the sound data in the information data recording area. As a result, there is the problem that the speed of recording of the image data or the sound data lowers remarkably while image data corresponding to a plurality of images or sound data corresponding to a long-time sound is being continuously recorded. The data files of the image data or the sound data which are recorded in the recording medium, such as a memory card or a hard disk unit, in the above-described manner, are read from the recording medium in units of one data file and transmitted to an external device, such as an external computer, a printer and a data transmission device. In the external device, various processing such as operational processing, printing processing or data transmission processing is performed. Each of the data files recorded in the recording medium is handled as an independent file. To prevent a wrong data file from being erroneously read out together with a desired file recorded in the recording medium or to prevent a wrong data file from being erroneously erased during erasure of a desired file recorded in the recording medium, it is necessary to individually add a discrimination number to each data file during recording of the data files in the recording medium so that each of the data files can be identified. For example, a system which records image data files in the recording medium is arranged to count the number of photographic pictures recorded during photographing and recording operations, store the counted number of recorded photographic pictures in a system body, generates a discrimination number corresponding to the stored number or recorded photographic pictures, add the generated discrimination number to an obtained image data file, and record the image data file in the recording medium together with the generated discrimination number. Since the above-described electronic still video camera is a portable device, a supply of electric power depends on a battery and, if the remaining amount of battery power becomes less during photographing and recording, it will be necessary to replace the battery. If the remaining amount of power in the battery provided in the system body is insufficient or the battery is removed from the system body for battery replacement, the number of recorded photographic pictures which has been stored in the system body in the above-described manner will be reset. If photographing and recording operations are executed after the battery replacement, a discrimination number identical to a discrimination number which is already added to an image data file recorded in the recording medium is added to a new image data file, and the new image data file is recorded together with the already used discrimination number. When a predetermined image data file recorded in the recording medium is to be read out and transmitted to an external device, such as an external computer, a printer and a data transmission device for the purpose of executing various processing such as operational processing, printing processing or data transmission processing in the external device, there is the problem that a wrong data file is erroneously read out together with the desired file. Otherwise, when a predetermined data file recorded in the recording medium is to be erased, there is the problem that a wrong file is erroneously erased in place of the desired file. To solve the above-described problems, a nonvolatile memory may be provided in the system body so that the counted number of recorded photographic pictures is stored in the nonvolatile memory during photographing and recording operations. With this arrangement, if the remaining amount of power in the battery provided in the system body becomes insufficient or the battery is removed from the system body for battery replacement, it is possible to prevent resetting of the counted number of recorded photographic pictures which are stored in the nonvolatile memory within the system body in the above-described manner. However, the number of times of data rewriting of the nonvolatile memory is limited, and if the number of times of rewriting of data about the number of recorded photographic pictures exceeds the allowable number of times of data writing of the nonvolatile memory, data about the number of recorded photographic pictures is not correctly updated. As a result, a discrimination number identical to a discrimination number which is already added to an image data file recorded in the recording medium is added to a new image data file, and the new image data file is recorded together with the already used discrimination number. The above-described system is also arranged in the following manner. If a digitized image signal (i.e., image data) or a digitized sound signal (i.e., sound data) are to be recorded in a recording medium such as a memory card or a hard disk unit, after the image data or the sound data is stored in an image memory once, the image data or the sound data stored in the image memory is read out and recorded in the recording medium. During photographing and recording operations, if the storage capacity of the image memory is filled with the image data or the sound data stored in the image memory once, the photographing and recording operations are interrupted once and the image data or the sound data stored in the image memory is transmitted to and recorded in the recording medium. Thus, if a storage capacity capable of storing the image data or the sound data occurs in the storage capacity of the image memory, the system is placed in the state of being able to restart the photographing and recording operations. However, in the case of the electronic still camera having the above-described arrangement, an operator cannot make a judgement as to whether the photographing and recording operations are interrupted because the storage capacity of the image memory is full or the photographing and recording operations can be performed because the storage capacity of the image memory contains a data storable portion. Such an electronic still camera, therefore, involves the following operational disadvantages. For example, if the operator operates a recording start instructing switch to continue the photographing and recording operations, it may be impossible to start the photographing and recording operations. If the operator operates the recording start instructing switch during an interruption of the photographing and recording operations and the recording start instructing switch remains operated, the photographing and recording operations are restarted at an unintended timing for the operator, so that unintended image data or sound data will be recorded in the recording medium. It is particularly difficult for the operator to make a judgement as to the timings of starting, resuming and ending of the photographing and recording operations during a continuous-shooting recording mode. Such an electronic still camera has also conventionally been realized as an apparatus capable of recording and reproducing still image data and sound data in a recording medium using a magnetic disk called a still video floppy disk. An electronic still camera is also proposed which uses a memory card including a solid-state memory element, such as a DRAM, an SRAM or an EEPROM, which is packaged in card form. If the still image data and the sound data are to be recorded in the recording medium described above, the still image data and the sound data are recorded in file form on picture-by-picture basis, and combination information indicative of a correspondence between each image file and each sound file is also recorded as a control file. On the basis of the combination information in the control file, the image files and the sound files are combined so that reproduction or transmission can be performed. However, in the case of the conventional electronic still camera, if the control file is erased, the correspondence between the image files and the sound files is lost, so that it is impossible to optimumly combine the image files with the sound files so that reproduction or transmission can be performed. It is, therefore, an object of the present invention to an information signal processing apparatus capable of solving the above-described problems. Another object of the present invention is to provide an information signal processing apparatus which is capable of recording an information signal having a large amount of information in a recording medium without lowering a recording speed and the size, weight and cost of which can be easily reduced. Another object of the present invention is to provide an information signal processing apparatus of good operability which is capable of preventing erroneous discrimination information from being added to an information signal when discrimination information which serves to discriminate among information signals to be recorded in a recording medium in predetermined units is to be added to the information signal, so that the information signal can be recorded in the recording medium with correct discrimination information added to the information signal. In such an information signal processing apparatus, it is possible to accurately read out the information signal recorded in the recording medium in the predetermined units so that the read information signal can be erased or subjected to various processings in the external device. Another object of the present invention is to provide an information signal processing apparatus of good operability which is arranged so that when an image signal is to be continuously recorded in a recording medium, an operator can easily make a judgement as to the recording timing of the image signal to record the necessary information in a recording medium at the desired timing, whereby it is possible to prevent erroneous recording of an unnecessary information signal. Another object of the present invention is to provide an information signal processing apparatus capable of optimumly combining still image data with sound data for the purpose of reproduction or transmission even if there is no information indicative of a correspondence relation between the still image data and the sound data. These objects are achieved by an apparatus according to claim 1. The invention is further developed by the features mentioned in the subclaims. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description of preferred embodiments of the present invention, taken in conjunction with the accompanying drawings. Fig. 1 is a block diagram schematically showing the arrangement of an electronic still video system to which a first embodiment of the present invention is applied; Fig. 2 is part of a flowchart showing the main operation routine of the electronic still video system shown in Fig. 1; Fig. 3 is part of the flowchart showing the main operation routine of the electronic still video system shown in Fig. 1; Fig. 4 is part of the flowchart showing the main operation routine of the electronic still video system shown in Fig. 1; Fig. 5 is a flowchart which serves to explain in detail a distance·light measuring operation according to the first embodiment of the present invention; Fig. 6 is a flowchart which serves to explain in detail a photographic operation according to the first embodiment of the present invention; Fig. 7 is a flowchart which serves to explain in detail a sound recording operation according to the first embodiment of the present invention; Fig. 8 is part of a flowchart which serves to explain in detail a reproducing operation according to the first embodiment of the present invention; Fig. 9 is part of the flowchart which serves to explain in detail the reproducing operation according to the first embodiment of the present invention; Fig. 10 is part of a flowchart showing in detail a transmission operation according to the first embodiment of the present invention; Fig. 11 is part of the flowchart showing in detail the transmission operation according to the first embodiment of the present invention; Fig. 12 is part of a flowchart showing in detail one example of an associated-sound retrieval operation according to the first embodiment of the present invention; Fig. 13 is part of the flowchart showing in detail the one example of the associated-sound retrieval operation according to the first embodiment of the present invention; Fig. 14 is part of a flowchart showing in detail another example of the associated-sound retrieval operation according to the first embodiment of the present invention; Fig. 15 is part of the flowchart showing in detail the above example of the associated-sound retrieval operation according to the first embodiment of the present invention; Fig. 16 is a flowchart showing in detail a combination inappropriateness determining operation according to the first embodiment of the present invention; Fig. 17 is part of a flowchart showing a main operation according to the second embodiment of the present invention; Fig. 18 is part of the flowchart showing the main operation according to the second embodiment of the present invention; Fig. 19 is part of the flowchart showing the main operation according to the second embodiment of the present invention; Fig. 20 is part of a flowchart showing in detail a reproducing operation according to the second embodiment of the present invention; Fig. 21 is part of the flowchart showing in detail the reproducing operation according to the second embodiment of the present invention; Fig. 22 is part of a flowchart showing in detail a transmission operation according to the second embodiment of the present invention; Fig. 23 is part of the flowchart showing in detail the transmission operation according to the second embodiment of the present invention; Fig. 24 is part of a flowchart showing in detail an associated-sound retrieval operation according to the second embodiment of the present invention; Fig. 25 is part of the flowchart showing in detail the associated-sound retrieval operation according to the second embodiment of the present invention; Fig. 26 is a flowchart showing in detail a combination inappropriateness determining operation according to the second embodiment of the present invention; Fig. 27 is a flowchart showing part of a main operation according to a third embodiment of the present invention; and Fig. 28 is a flowchart showing part of the main operation according to the third embodiment of the present invention. Fig. 1 is a block diagram schematically showing the arrangement of an electronic still camera to which a first embodiment of the present invention is applied. An electronic still camera 3200 is arranged to employ a system controlling circuit 3050 as a primary control circuit to execute predetermined processing such as photographic processing, sound inputting processing, processing for recording and storing photographic image data or input sound data in a recording medium 3100, processing for reproducing recorded image data or sound data or processing for transmitting the reproduced image or sound data. Memory accesses for recording and reproduction are executed under the control of a memory controlling circuit 3020 on the basis of an instruction supplied from the system controlling circuit 3050. The processing for recording and storing photographic image data or input sound data in the recording medium 3100 is executed under the control of an interface 3026 on the basis of an instruction supplied from the system controlling circuit 3050. The processing for transmitting data between the electronic still camera 3200 and an external device such as a personal computer or a printer is executed by means of a modem 3028 under the control of the interface 3026 on the basis of an instruction supplied from the system controlling circuit 3050. The electronic still camera 3200 includes a photographic lens 3010, a shutter 3012 having a diaphragm function, an image pickup device 3014, such as a CCD, for converting an optical image into an electrical signal, an A/D converter 3016 for converting analog image data obtained from photoelectric conversion by the image pickup device 3014 into digital data, a clock circuit 3018 for supplying a clock signal or a control signal to the image pickup device 3014, the A/D converter 3016, an A/D converter 3092, a memory controlling circuit 3020, a D/A converter 1036 and a D/A converter 3094 under the control of the system controlling circuit 3050, an image·sound memory 3024 for temporarily storing image data or sound data, a microphone 3090 for converting sound into an electrical signal, and the A/D converter 3092 for converting analog sound data supplied from the microphone 3090 into digital data. The memory controlling circuit 3020 writes the image data inputted from the image pickup device 3014 and the A/D converter 3016 and the sound data inputted from the microphone 3090 and the A/D converter 3092 into the image·sound memory 3024. The memory controlling circuit 3020 also reads the written image data and sound data from the image·sound memory 3024 so that the image data and the sound data are outputted to the recording medium 3100, the image display device 1038 or an external device (not shown) such as a personal computer. The electronic still camera 3200 also includes a compressing·expanding circuit 3022 for compressing or expanding the image data or the sound data by a method such as adaptive discrete cosine transform (ADCT) or adaptive predictive PCT coding (ADPCM), and the image·sound memory for temporarily storing the image data or the sound data. During compression·expansion of the image data or the sound data, the compressing·expanding circuit 3022 reads the image data or the sound data from the image·sound memory 3024 and performs compression or expansion of the read image or sound data, and writes the compressed or expanded data into the image·sound memory 3024. The electronic still camera 3200 also includes an image display device 3038. Under the control of the memory controlling circuit 3020, when the image data is read from the image·sound memory 3024 and analog image data obtained from D/A conversion by the D/A converter 3036 is inputted into the image display device 3038, the image display device 3038 performs predetermined image reproduction processing and displays a reproduced image. The electronic still camera 3200 also includes an audio output device 3096. Under the control of the memory controlling circuit 3020, when the sound data is read from the image·sound memory 3024 and analog sound data obtained from D/A conversion executed by the D/A converter 3094 is inputted into the D/A converter 3094, the D/A converter 3094 performs predetermined sound reproduction processing and outputs a reproduced sound. The electronic still camera 3200 includes a connector 3030 for permitting transmission and reception of a data signal or a control signal to and from the recording medium 3100 such as a memory card or a hard disk unit, and a connector 3034 for permitting transmission and reception of a data signal or a control signal to and from the external device. Each of the connectors 3030 and 3034 can be used for transmission and reception of not only an electrical signal but also various signals such as a light wave signal and a sound wave signal. The recording medium 3100 such as a memory card or a hard disk unit has a recording area formed by a management data area 3102 and an information data area 3104, and data is written into and read from each of the management data area 3102 and the information data area 3104 through an interface 3106 and a connector 3108. Information from a writing protection 3110 and recording-medium discrimination information 3112 are also read to the outside through the interface 3106 and the connector 3108. The recording-medium discrimination information 3112 indicates the kind, characteristics and the like of the recording medium 3100, and the system controlling circuit 3050 recognizes the kind, characteristics and the like of a recording medium connected to the connector 3030 on the basis of the recording-medium discrimination information 3112. The interface 3106 includes a control circuit such as a CPU or an MPU, a nonvolatile memory such as a ROM or an EEPROM, a nonvolatile memory such as a RAM, and other associated circuit elements, and performs control of the recording medium 3100 on the basis of a predetermined program. The electronic still camera 3200 also includes a lens driving circuit 3040 for driving the focusing lens provided in the photographic lens 3010, a lens driving circuit 3042 for opening and closing the shutter 3012, a distance measuring circuit 3044 for measuring the distance to a subject, a light measuring circuit 3046 for measuring the luminance of the subject, and a flash unit 3048 for electrically emitting light. The system controlling circuit 3050 causes the lens controlling circuit 3040 to drive the focusing lens of the photographic lens 3010 on the basis of the result of a distance measurement executed by the distance measuring circuit 3044, thereby bringing the photographic lens 3010 into focus. On the basis of the subject luminance measured by the light measuring circuit 3046, the system controlling circuit 3050 further determines the shutter opening time of the shutter 3012 driven by the lens driving circuit 3042 so that an optimum amount of exposure can be achieved. The system controlling circuit 3050 also includes a memory 3052 for storing constants and variables for use in the operation of the system controlling circuit 3050 and other information such as the time of photography. The system controlling circuit 3050 includes a display device 3054, such as a liquid-crystal display, for displaying the state of operation. The electronic still camera 3050 includes a switch group 3056 which is operated to input various operational instructions into the system controlling circuit 3050. The switch group 3056 includes various switches, such as a main switch 3060, a distance·light measuring switch 3062 for specifying execution of a distance measurement by the distance measuring circuit 3044 and execution of a light measurement by the light measuring circuit 3046, a release switch 3064 for inputting an instruction to start a photographic operation and an instruction to record photographic image data in the recording medium 3100, a mode switch 3066 for switchably setting a single-shooting mode for executing one or one set of photographic operations, a continuous-shooting mode for continuously executing photography for a plurality of photographic images, and a self-timer photography mode, an image mode switch 3068 for setting a image recording format such as the number of images to be recorded, a discrimination between frame recording and field recording, an aspect ratio, the arrangement of pixels, a compression method and a compression ratio, an erase mode switch 3070 for setting an erase mode, an erase switch 3072 for inputting an instruction to execute an erasure, a main mode switch 3074 for selecting a desired mode from among modes such as a recording mode, a reproduction mode and a transmission mode, a sound mode switch 3076 for setting sound recording methods, such as on/off of sound recording, the time period of sound recording, the number of channels used in a recording method such as stereophonic recording/bilingual recording/monaural recording, a compression method and a compression ratio, and a sound start switch 3078 for inputting an instruction to execute sound recording or sound reproduction. The system controlling circuit 3050 also includes a power supply circuit 3080, a battery 3082, a connector 3084 and a connector 3086. The power supply circuit 3080 is made up of constituent elements such as a battery detecting circuit, a DC-DC converter and a switch for selecting a block to be energized, The power supply circuit 3080 detects the presence or absence of an attached battery, the kind of the attached battery and the remaining amount of battery power, and controls the DC-DC converter on the basis of the result of the detection and an instruction supplied from the system controlling circuit 3050, thereby supplying the required voltage to each part at the required time interval. The operation of the electronic still camera according to the first embodiment will be described below with reference to the flowcharts shown in Figs. 2 to 16. Figs. 2 to 4 show in combination the flowchart of the main routine of the first embodiment. Referring to Fig. 2, when the power supply circuit 3080 is turned on, the system controlling circuit 3050 initializes various flags and control variables (Step S3001). If the main switch 3060 is turned on (Step S3002), a decision is made as to the kind of mode selected by the main mode switch 3074 (Step S3003). If the reproduction mode is selected, predetermined reproduction processing for the reproduction mode is executed (Step S3010). If the transmission mode is selected, predetermined transmission processing for the transmission mode is executed (Step S3011) and the process returns to Step S3002. The reproduction processing and the transmission processing will be described later. If the recording mode is selected, it is determined whether the storage recording medium 3100, such as a memory card or a hard disk unit, is connected to the electronic still camera 3200 (Step S3004). If the storage recording medium 3100 is connected to the electronic still camera 3200, it is determined whether the writing protection 3110 of the connected storage recording medium 3100 is cancelled (Step S3005). If it is determined that the writing protection 3110 of the connected storage recording medium 3100 is cancelled, retrieval is performed as to the state of recording in the management data area 3102, the information data area 3104 and the like of the storage recording medium 3100 (Step S3006). On the basis of the management data of the management data area 3102, each of the modes set by the switch group 3056 and the mode selected according to the kind of the connected storage recording medium 3100, the display device 3054 is made to display information such as exposure number, date and operation mode (Step S3007). If there is a recordable empty area in the management data area 3102 (Step S3008), the process proceeds to Step S3010. If the storage recording medium 3100, such as a hard disk unit or a memory card, is not connected to the electronic still camera 3200 (Step S3004), or if the writing protection 3110 of the connected storage recording medium 3100 is set (Step S3005), or if there is no recordable empty area in the management data area 3102 (Step S3008), the display device 3054 is made to provide an associated warning display (Step S3009). Subsequently, the process waits for the main switch 3060 is operated (Step S3002). In Step S3010, it is determined whether the distance·light measuring switch 3062 has been turned on. If the distance·light measuring switch 3062 has not been turned on, the process returns to Step S3002. If the distance·light measuring switch 3062 has been turned on, the distance measuring circuit 3044 and the light measuring circuit 3046 are made to perform distance measurement and light measurement, respectively. Then, the photographic lens 3010 is focused on a subject by the lens driving circuit 3042 and a shutter time is determined (Step S3011). The distance·light measuring operation will be described later in detail. The distance·light measuring operation is repeated until the release switch 3064 is turned on after the distance·light measuring switch 3062 is turned on (Steps S3010 to S3012). If the release switch 3064 is turned on, a photographic operation is executed and the obtained image data is written into the image·sound memory 3024 (Step S3013). The system controlling circuit 3050 disables the respective functions of the sound mode switch 3076 and the sound start switch 3078 to reject a sound recording instruction from the time when the photographic operation is started until the end of image recording on the recording medium 3100, thereby preventing recording of a mechanical noise due to an operation of the shutter 3012, the flash unit 3048, the recording medium 3100 (hard disk unit) or the like. The aforementioned photographic operation will be described later in detail. If the photographic operation up to the image recording is completed, the time of photography associated with the image is stored in the memory 3052 (Step S3014). If the photographic operation is to be continued in the continuous-shooting mode (Step S3015), the process proceeds to Step S3016. If it is determined in Step S3016 that there is a recordable area in the image·sound memory 3024, the process returns to Step S3010 and a similar operation is repeated. If it is determined in Step S3016 that there is no recordable area in the image·sound memory 3024, image data and the time of photography associated with the image data are respectively read from the image·sound memory 3024 and the memory 3052 under the control of the memory controlling circuit 3020. The image data is recorded in file form in the information data area 3104 of the recording medium 3100 through the interface 3026 and the connector 3030, while management information about the image data, such as the time of photography and the time of image-file creation, is recorded in the management data area 3102 through the interface 3026 and the connector 3030 (Step S3017). Then, the process returns to Step S3010 and similar processing is repeated. If the continuous-shooting mode (or the single-shooting mode) is not to be continued (Step S3015), the process proceeds to Step S3018. If it is determined in Step S3018 that image data which is not recorded in the image·sound memory 3024 remains in the image·sound memory 3024 (Step S3018), the image data and the time of photography associated with the image data are respectively read from the image·sound memory 3024 and the memory 3052 under the control of the memory controlling circuit 3020. The image data is recorded in file form in the information data area 3104 of the recording medium 3100 through the interface 3026 and the connector 3030, while management information about the image data, such as the time of photography and the time of image-file creation, is recorded in the management data area 3102 through the interface 3026 and the connector 3030 (Step S3019). Both the time of photography and the time of image-file creation recorded in the management data area 3102 may have the form of year/month/day/hour/minute/second, or only the time of photography may have the abbreviated form of year/month/day/hour/minute in which "second" is omitted. The image recording operation of Step S3019 is repeated by the amount of the image data stored in the image·sound memory 3024 (Steps S3019 to S3020). When the recording of the image data on the recording medium 3100 is completed in the above-described manner, the system controlling circuit 3050 cancels the inhibition of sound recording and enables sound recording. By the sound recording, it is possible to realize the "sound memo" function of adding sound to photographic image data. More specifically, if a sound mode is set by the sound mode switch 3076 (Step S3021) and the sound start switch 3078 is turned on (Step S3022), recording of sound data which is inputted from the microphone 3090 and A/D converted by the A/D converter 3092 is performed by writing the sound data into the image·sound memory 3024 under the control of the memory controlling circuit 3020 (Step S3026). During this recording, the system controlling circuit 3050 stores the recording time period of the sound data and the elapsed time between the completion of photography and the start of the sound recording, in an internal register of the system controlling circuit 3050 or the memory 3052. This recording operation will be described later in detail. During the execution of the sound recording, the system controlling circuit 3050 disables the photography executing function of the release switch 3064, thereby rejecting a photography starting instruction. If the recording medium 3100 is provided with a mechanical driving mechanism, as in the case of a hard disk unit or the like, the system controlling circuit 3050 stops the rotation of the hard disk unit or the like prior to initiation of the sound recording and inhibits any access accompanied by a head travel, thereby preventing recording of a mechanical noise due to an operation of the shutter 3012, the flash unit 3048, the recording medium 3100 (hard disk unit) or the like. If the recording medium 3100 does not have a mechanical driving mechanism, as in the case of a memory card or the like, no access is inhibited. When the above-described sound recording is completed, the sound data and the time of the recording of the sound data and the elapsed time between the end of the photography and the start of the sound recording are respectively read from the image·sound memory 3024 and the memory 3052 (or the internal register). The sound data is recorded in file form in the information data area 3104 of the recording medium 3100 through the interface 3026 and the connector 3030, while management information about the sound data, such as the time of the sound recording and the time of sound-file creation, is recorded in the management data area 3102 through the interface 3026 and the connector 3030 (Step S3027). In the above-described case, if the recording medium 3100 is provided with a mechanical driving mechanism, as in the case of a hard disk unit or the like, the system controlling circuit 3050 starts up the hard disk unit or the like prior to initiation of the sound recording and cancels the inhibition of access accompanied by a head travel. If the sound recording is completed, the system controlling circuit 3050 cancels the state of inhibiting photography from being executed in response to the release switch 3064. If the sound start switch 3078 is not turned on within a predetermined sound recording start permission interval (Steps S3022 to S3024), the display device 3054 is made to provide a warning display indicating that the sound recording start permission interval is over (Step S3025). The process returns to Step S3002, where the process waits for the main switch 3060 to be operated. In the sound recording of Step S3027, the sound recording start permission interval is also recorded in the management data area 3102. Figs. 5 is a flowchart showing in detail the distance·light measuring operation executed in Step S3011 of Fig. 3. The distance to the subject is measured by the distance measuring circuit 3044 and the subject distance is stored in the memory 3052 (Step S3051). Then, the luminance of the subject is measured by the light measuring circuit 3046 and the subject luminance is stored in the memory 3052 (Step S3052). It is then determined whether it is necessary to use the flash unit 3048, on the basis of the subject luminance measured by the light measuring circuit 3046 (Step S3053). If it is necessary to use the flash unit 3048, a flash flag is set and the flash unit 3048 is charged (Step S3054), and the process returns to the main routine. If it is not necessary to use the flash unit 3048, the process skips Step S3054 and returns to the main routine. Fig. 6 is a flowchart showing in detail the photographic operation executed in Step S3013 of Fig. 3. The system controlling circuit 3050 reads the subject distance stored in the memory 3052 and causes the lens controlling circuit 3040 to drive the focusing lens of the photographic lens 3010 on the basis of the subject distance, thereby focusing the photographic lens 3010 on the subject (Step S3061). Then, the lens driving circuit 3042 opens the shutter 3012 by the shutter time determined on the basis of the subject luminance, thereby exposing the image pickup device 3041 (Steps S3062 to S3063). Then, it is determined whether it is necessary to use the flash unit 3048, on the basis of the flash flag (Step S3064). If it is necessary to use the flash unit 3048, the flash unit 3048 is made to flash (Step S3065), and the process waits for the end of the exposure of the image pickup device 3041 (Step S3066). If the flash unit 3048 is not needed, the process proceeds to Step S3066 without causing the flash unit 3048 to flash, and waits for the end of the exposure of the image pickup device 3041. If the exposure of the image pickup device 3041 comes to an end, the shutter 3012 is closed (Step S3067). A charge signal (image data) which reflects a photographic image is read from the image pickup device 3041, and the image data is written into the image·sound memory 3024 through the A/D converter 3016 and the memory controlling circuit 3020 (Step S3068). Then, the process returns to the main routine. Fig. 7 is a flowchart showing in detail the sound recording operation executed in Step S3026 of Fig. 4. A sound recording time T is set in a sound recording timer (Step S3071), and the sound data inputted from the microphone 3090 and the A/D converter 3092 starts to be written into the image·sound memory 3024 under the control of the memory controlling circuit 3020 (Step S3072). The sound recording time T of the sound recording timer is accumulated (Step S3073). This accumulation is performed by counting down the sound recording time T of the sound recording timer. If the sound recording is forcedly stopped or the sound recording timer counts down the sound recording time T to "0", the writing of the sound data is brought to an end (Steps S3074 to S3076), and the process returns to the main routine. Fig. 8 is a flowchart showing in detail the reproducing operation executed in Step S3010 of Fig. 2. If an image to be reproduced is selected by setting an input button (not shown) or an input dial (not shown) or by external communication (Step S3081), the system controlling circuit 3050 reads out the necessary management information containing the time of photography by performing retrieval from the management data area 3102 of the recording medium 3100. On the basis of the read necessary management information, the corresponding image data is read from the information data area 3104, and is written into the image·sound memory 3024 through the connector 3030, the interface 3026 and the memory controlling circuit 3020. At this time, the read necessary management information containing the time of photography is stored in the memory 3052. Then, the image data is read from the image·sound memory 3024 through the memory controlling circuit 3020, and the read image data is subjected to D/A conversion in the D/A converter 3036. The analog image data is visually displayed on the image display device 3038 (Step S3082). At this time, if necessary, the image data is expanded by the compressing·expanding circuit 3022. If it is necessary to compress the image data to a signal suitable for display on the image display device 3038, as by reducing the number of pixels, the image data is compressed by the compressing·expanding circuit 3022. Then, retrieval is performed from the management data area 3102 of the recording medium 3100 to retrieve associated sound data to be combined with the selected image (Step S3083). The retrieval of the associated sound is performed by comparing the time of photography of the selected image stored in the memory 3052 with the time of recording of the sound, which is read from the recording medium 3100. Such a retrieval operation will be described later in detail. The result of the retrieval (retrieved combination information or the absence of sound data to be combined) is displayed on the display device 3054 and on the image display device 3038 (Step S3084). Then, if sound data associated with the selected image is present (Step S3085) and if the sound start switch 3078 is turned on (Step S3086), reproduction of the associated sound data is started (Step S3087). The reproduction of the associated sound data is performed in the following manner. The management information is read out by performing retrieval from the management data area 3102 of the recording medium 3100, and the corresponding sound data is read from the information data area 3104 on the basis of the management information and is written into the image·sound memory 3024 through the connector 3030, the interface 3026 and the memory controlling circuit 3020. Then, the sound data is read from the image·sound memory 3024 through the memory controlling circuit 3020 and the read sound data is subjected to D/A conversion in the D/A converter 3094, and the audio output device 3096 produces an audio output. At this time, if necessary, the sound data is expanded by the compressing·expanding circuit 3022 (Step S3088). If the sound recording is forcedly stopped (Step S3089) or if all the sound data associated with the selected image are outputted (Step S3090), the reproduction and outputting of sound data is brought to an end (Step S3091). Then, if the next image is selected (Step S3092), the process returns to Step S3081, and similar processing is repeated in connection with the selected image. If the next image is not selected and if the main mode switch 3074 is not switched and the reproducing mode has not been turned off (Step S3093), the process returns to Step S3085 and the reproduction and outputting of sound data associated with the selected image is repeated. If the main mode switch 3074 is switched and the reproducing mode is turned off (Step S3093), the process returns to the main routine and the reproducing operation is thus brought to an end. Figs. 10 to 11 are flowcharts showing in combination the details of the transmission operation executed in Step S3011 of Fig. 2. If an image to be transmitted is selected by setting an input button (not shown) or an input dial (not shown) or by external communication (Step S3101), the system controlling circuit 3050 reads out the necessary management information containing the time of photography by performing retrieval from the management data area 3102 of the recording medium 3100. On the basis of the read necessary management information, the corresponding image data is read from the information data area 3104, and is written into the image·sound memory 3024 through the connector 3030, the interface 3026 and the memory controlling circuit 3020. At this time, the read necessary management information containing the time of photography is written into the memory 3052. Then, the image data is read from the image·sound memory 3024 through the memory controlling circuit 3020, and the read image data is subjected to D/A conversion in the D/A converter 3036. The analog image data is visually displayed on the image display device 3038 (Step S3102). At this time, if necessary, the image data is expanded by the compressing·expanding circuit 3022. If it is necessary to compress the image data to a signal suitable for display on the image display device 3038, as by reducing the number of pixels, the image data is compressed by the compressing·expanding circuit 3022. Then, retrieval is performed from the management data area 3102 of the recording medium 3100 to retrieve associated sound data to be combined with the selected image (Step S3103). The retrieval of the associated sound is performed by comparing the time of photography of the selected image stored in the memory 3052 with the time of recording of the sound, which is read from the recording medium 3100. Such a retrieval operation will be described later in detail. The result of the retrieval (retrieved combination information or the absence of sound data to be combined) is displayed on the display device 3054 and on the image display device 3038 (Step S3104). Then, if sound data associated with the selected image is present (Step S3105), a combination of the selected image data and the associated sound data is set on the table of a file to be transmitted, which file is prepared in the memory 3052 (Step S3106). If sound data associated with the selected image is absent, only the selected image data is set on the table of the file to be transmitted, which file is prepared in the memory 3052 (Step S3107). Then, if a transmission start switch (not shown) is turned on (Step S3108), connection with a line is established and transmission of the file contents set on the table is started (Step S3109). The transmission of an image file and a sound file is performed in the following manner. The necessary management information is read out by performing retrieval from the management data area 3102 of the recording medium 3100, and the corresponding image data and sound data are read from the information data area 3104 on the basis of the management information and are written into the image·sound memory 3024 through the connector 3030, the interface 3026 and the memory controlling circuit 3020. Then, the image data and the sound data are read from the image·sound memory 3024 through the memory controlling circuit 3020 and the read image data and sound data are transmitted to an external device (not shown), such as a personal computer or a printer, through the interface 3026, the modem 3028, the connector 3034 and a cable (not shown) (Step S3110). At this time, if necessary, the image data and the sound data are expanded by the compressing·expanding circuit 3022 before transmission. If an error occurs during the transmission (Step S3111), each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3112). The processing of stopping the transmission is performed (Step S3114), and the connection with the line is cancelled to bring the transmission to an end (Step S3116). If the transmission is forcedly stopped (Step S3113) or if all the desired data are transmitted (Step S3115), the connection with the line is cancelled to bring the transmission to an end (Step S3116). Then, if the next image is selected (Step S3117), the process returns to Step S3101, and similar processing is repeated in connection with the selected image. If the next image is not selected and if the main mode switch 3074 is not switched and the transmission mode has not been turned off (Step S3118), the process returns to Step S3108 and the transmission of the image data and the sound data is repeated. If the main mode switch 3074 is switched and the transmission mode is turned off (step S3118), the process returns to the main routine and the transmission operation is thus brought to an end. Figs. 12 to 13 are flowcharts showing in combination an operational example, proper to the first embodiment, of the associated-sound retrieving operation executed in Step S3083 of Fig. 8 and in Step S3101 of Fig. 10. The system controlling circuit 3050 first reads management data, such as file name, file-creation time and file attribute, about a selected image file from the management data area 3102 of the recording medium 3100, and stores the read management data in the internal register or the memory 3052 (Step S3121). This storing operation is performed in the following manner. The necessary data is read from the management data area 3102 or the information data area 3104 and is written into the image·sound memory 3024 through the interface 3106, the connector 3108, the connector 3030, the interface 3026 and the memory controlling circuit 3020. After that, the written data is stored in the internal register of the system controlling circuit 3050 or the memory 3052 through the memory controlling circuit 3020. Then, all the management data are sequentially read from the management data area 3102 (Step S3122), and if the read data is a sound file (Step S3123), the time of the creation of the sound file is read (Step S3124) and a time difference between the time of the creation of the sound file and the time of the creation of the image file stored in the memory 3052 is computed (Step S3125). If the read data is not a sound file, the process proceeds to Step S3129. Then, if the time difference in file creation has not yet been stored (Step S3126), the presently computed time difference in file creation and the file name of the associated sound file are stored in the internal register or the memory 3052 (Step S3128). If the time difference in file creation has been stored (Step S3126), the presently stored time difference in file creation and the presently computed time difference in file creation are compared with each other. If the presently computed time difference in file creation is small compared to the presently stored time difference in file creation (Step S3127), the presently computed time difference in file creation is stored in the internal register or the memory 3052 (Step S3128). If the presently computed time difference in file creation is large compared to the presently stored time difference in file creation (Step S3127), the process skips Step S3128 and proceeds to Step S3129. in other words, the file name and the time difference in file creation of a sound file which shows the smallest time difference in file creation with respect to the selected image file are stored. If management data which has not yet been read from the management data area 3102 (particularly, a sound file) is present (Step S3129), the process returns to Step S3122 and reading of the management data is continued and similar processing is performed on the read sound file. If the stored data indicative of the time difference in file creation is absent (Step S3130), for example, if no sound file is present in the management data area 3102, each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3133). The process returns to the main routine and the associated-sound retrieving operation is thus brought to an end. If the stored data indicative of the time difference in file creation is present (Step S3130), it is determined whether the combination of the image file and the sound file is inappropriate, on the basis of the time difference in file creation indicated by the stored data, i.e., on the basis of the time difference in file creation between the selected image file and the sound file selected by retrieval and computation (Step S3131). The operation of determining whether such combination is inappropriate will be described later in detail. If it is determined that such combination is inappropriate, each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3133). The process returns to the main routine and the associated-sound retrieving operation is thur brought to an end. On the other hand, if it is determined that such combination is appropriate, the process makes a decision to select the combination of the selected image file and the sound file corresponding to the stored smallest time difference in file creation (Step S3134), and the process returns to the main routine and the associated-sound retrieving operation is thur brought to an end. Figs. 14 to 15 are flowcharts showing in combination another operational example, proper to the tenth embodiment, of the associated-sound retrieving operation executed in Step S3083 of Fig. 8 and in Step S3103 of Fig. 10. The system controlling circuit 3050 first reads management data, such as file name, file-creation time and file attribute, about a selected image file from the management data area 3102 of the recording medium 3100, and stores the read management data in the internal register or the memory 3052 (Step S3141). This storing operation is performed in the following manner. The necessary data is read from the management data area 3102 or the information data area 3104 and is written into the image·sound memory 3024 through the interface 3106, the connector 3108, the connector 3030, the interface 3026 and the memory controlling circuit 3020. After that, the written data is stored in the internal register of the system controlling circuit 3050 or the memory 3052 through the memory controlling circuit 3020. Then, all the management data are sequentially read from the management data area 3102 (Step S3142), and if the read data is a sound file (Step S3143), the time of the creation of the sound file is read (Step S3144). If the time of the creation of the sound file is later than the time of the creation of the image file (Step S3145), the time difference in file creation between the sound file and the image file stored in the memory 3052 is computed (Step S3146). If the time of the creation of the sound file is earlier than the time of the creation of the image file (Step S3145) and if the read data is a sound file, the process proceeds to Step S3150. Then, if the time difference in file creation has not yet been stored (Step S3147), the time difference in file creation associated with the selected image file is stored in the internal register or the memory 3052 (Step S3149). If the time difference in file creation has been stored (Step S3147), the presently stored time difference in file creation and the presently computed time difference in file creation are compared with each other. If the presently computed time difference in file creation is small compared to the presently stored time difference in file creation (Step S3148), the presently computed time difference in file creation and the associated sound file are stored in the internal register or the memory 3052 (Step S3149). If the presently computed time difference in file creation is large compared to the presently stored time difference in file creation (Step S3148), the process skips Step S3149 and proceeds to Step S3150. In other words, the file name and the time difference in file creation of a sound file which shows the smallest time difference in file creation with respect to the selected image file are stored. If management data which has not yet been read from the management data area 3102 (particularly, a sound file) is present (step S3150), the process returns to Step S3142 and reading of the management data is continued and similar processing is performed on the read sound file. If the stored data indicative of the time difference in file creation is absent (Step S3151), for example, if no sound file is present in the management data area 3102, each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3154). The process returns to the main routine and the associated-sound retrieving operation is thus brought to an end. If the stored data indicative of the time difference in file creation is present (Step S3151), it is determined whether the combination of the image file and the sound file is inappropriate, on the basis of the time difference in file creation indicated by the stored data, i.e., on the basis of the time difference in file creation between the selected image file and the sound file selected by retrieval and computation (Step S3152). The operation of determining whether such combination is inappropriate will be described later in detail. If it is determined that such combination is inappropriate, each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3154). The process returns to the main routine and the associated-sound retrieving operation is thur brought to an end. On the other hand, if it is determined that such combination is appropriate, the process make a decision to select the combination of the selected image file and the sound file corresponding to the (stored) smallest time difference in file creation, which sound file is created subsequently to the selected image file (Step S3155). Then, the process returns to the main routine and the associated-sound retrieving operation is thus brought to an end. Fig. 16 is a flowchart showing in detail the combination inappropriateness determining operation executed in Step S3131 of Fig. 13 and in Step S3152 of Fig. 15. The system controlling circuit 3050 first obtains the sound recording start permission interval (time) which is used in Steps S3023 and S3024 of Fig. 4 (Step S3161). Then, on the basis of the value of the time difference in file creation, the file name and the time difference in file creation of the sound file stored in the internal register or the memory 3052 are read (Step S3162), and the recording time period of the sound file is obtained (Step S3163). Then, if the time period of the time difference in file creation between the sound file and the image file is greater than the total time period of the sound recording start permission interval (time) and the recording time period of the sound file (Step S3164), i.e., if it cannot be determined that the recording of the sound file was performed subsequently to the recording of the image file, it is determined that the present combination is inappropriate, and an error flag is set (Step S3165). The process returns to the main routine and the combination inappropriateness determining operation is thus brought to an end. On the other hand, if the time period of the time difference in file creation between the sound file and the image file is not greater than the total time period of the sound recording start permission interval (time) and the recording time period of the sound file (Step S3164), i.e., if it can be determined that the recording of the sound file was performed subsequently to the recording of the image file, it is determined that the present combination is appropriate, and the process returns to the main routine without setting the error flag. The combination inappropriateness determining operation is thus brought to an end. An electronic still camera to which a recording and reproduction device according to a second embodiment is applied will be described below. Since the arrangement of the electronic still camera is utterly identical to that of the first embodiment shown in Fig. 1, description thereof is omitted, and an operation proper to the electronic still camera will be described with reference to the flowchart shown in Figs. 17 through 26. Figs. 17 to 19 show in combination the flowchart of the main routine of the second embodiment. Referring to Fig. 17, when the power supply circuit 3080 is turned on, the system controlling circuit 3050 initializes various flags and control variables (Step S3201). If the main switch 3060 is turned on (Step S3202), a decision is made as to the kind of mode selected by the main mode switch 3074 (Step S3203). If the reproduction mode is selected, predetermined reproduction processing for the reproduction mode is executed (Step S3210). If the transmission mode is selected, predetermined transmission processing for the transmission mode is executed (Step S3211) and the process returns to Step S3202. The reproduction processing and the transmission processing will be described later. If the recording mode is selected, it is determined whether the storage recording medium 3100, such as a memory card or a hard disk unit, is connected to the electronic still camera 3200 (Step S3204). If the storage recording medium 3100 is connected to the electronic still camera 3200, it is determined whether the writing protection 3110 of the connected storage recording medium 3100 is cancelled (Step S3205). If it is determined that the writing protection 3110 of the connected storage recording medium 3100 is cancelled, retrieval is performed as to the state of recording in the management data area 3102, the information data area 3104 and the like of the storage recording medium 3100 (Step S3206). On the basis of the management data of the management data area 3102, each of the modes set by the switch group 3056 and the mode selected according to the kind of the connected storage recording medium 3100, the display device 3054 is made to display information such as exposure number, date and operation mode (Step S3207). If there is a recordable empty area in the management data area 3102 (Step S3208), the process proceeds to Step S3212. If the storage recording medium 3100, such as a hard disk unit or a memory card, is not connected to the electronic still camera 3200 (Step S3204), or if the writing protection 3110 of the connected storage recording medium 3100 is set (Step S3205), or if there is no recordable empty area in the management data area 3102 (step S3208), the display device 3054 is made to provide an associated warning display (Step S3209). Subsequently, the process waits for the main switch 3060 is operated (Step S3202). In Step S3212, it is determined whether the distance·light measuring switch 3062 has been turned on. If the distance·light measuring switch 3062 has not been turned on, the process returns to Step S3202. If the distance·light measuring switch 3062 has been turned on, the distance measuring circuit 3044 and the light measuring circuit 3046 are made to perform distance measurement and light measurement, respectively. Then, the photographic lens 3010 is focused on a subject by the lens driving circuit 3042 and a shutter time is determined (Step S3213). The distance·light measuring operation has previously been described in detail with reference to Fig. 5. The distance·light measuring operation is repeated until the release switch 3064 is turned on after the distances·light measuring switch 3062 is turned on (Steps S3212 to S3214). If the release switch 3064 is turned on (Step S3214) and if no recording has yet been started (Step S3215), the sound recording timer T is initialized to "0" and sound recording is then started (Step S3226). Simultaneously, photography is executed and the obtained image data is written into the image·sound memory 3024 (Step S3217). If the recording medium 3100 is provided with a mechanical driving mechanism, as in the case of a hard disk unit or the like, the system controlling circuit 3050 stops the rotation of the hard disk unit or the like prior to initiation of the sound recording and inhibits any access accompanied by a head travel, thereby preventing recording of a mechanical noise due to an operation of the hard disk unit or the like. If the recording medium 3100 does not have a mechanical driving mechanism, as in the case of a memory card or the like, no access is inhibited even during sound recording. The detail of the photographic operation has previously been described with reference to Fig. 6. When the photographic operation up to the writing of the image data is completed, the time of photography associated with the image is stored in the memory 3052 (Step S3218). Then, while the count value of the sound recording timer T is being cumulatively displayed, a sound signal from the microphone 3090 is taken out and the obtained sound data is written into the image·sound memory 3024 through the A/D converter 3092 and the memory controlling circuit 3020 (Step S3219). If the sound recording timer T reaches a predetermined value or is forcedly stopped, the writing of the sound data is brought to an end (Steps S3220, S3221 and S3224). If photography in the continuous-shooting mode is to be continued during recording (Step S3222), the process proceeds to Step S3223. If it is determined in Step S3223 that there is a recordable area in the image·sound memory 3024, the process returns to Step S3212 and a similar operation is repeated. If it is determined in Step S3223 that there is no recordable area in the image·sound memory 3024, the writing of the sound data, i.e., the sound recording, is stopped and the sound recording time is stored in the internal memory or the memory 3052 (Step S3224). The stopping of the sound recording is performed by turning off the release switch 3064 in the case of a mode in which sound recording is performed during the ON interval of the release switch 3064. In the case of another mode in which, even if the release switch 3064 is turned off, sound recording is continued until a desired time elapses, the stopping of the sound recording is performed, as by operating the sound mode switch 3076 or the sound start switch 3078. After the sound recording has been stopped, if the recording medium 3100 is provided with a mechanical driving mechanism, as in the case of a hard disk unit or the like, the system controlling circuit 3050 starts up the hard disk unit or the like prior to initiation of a recording on the recording medium 3100 and cancels the inhibition of access accompanied by a head movement. If the sound recording comes to an end, the inhibition of photography to be executed by the release switch 3064 is cancelled. The image data and the time of photography associated with the image data are respectively read from the image·sound memory 3024 and the memory 3052 under the control of the memory controlling circuit 3020. The image data is recorded in file form in the information data area 3104 of the recording medium 3100, while management information about the image data, such as the time of photography and the time of image-file creation, is recorded in the management data area 3102, through the interface 3026, the connector 3030, the connector 3108 and the interface 3106 (Step S3225). The image recording operation of Step S3019 is repeated by the amount of the image data stored in the image·sound memory 3024 (Steps S3226 to S3225). When the image recording on the recording medium 3100 is completed, the recording of the sound data is performed (Step S3227) and the process returns to Step S3202. The recording of the sound data is performed in the following manner. The sound data is read from the image·sound memory 3024 under the control of the memory controlling circuit 3020, and the sound data and the time period of sound recording are recorded in file form in the information data area 3104 of the recording medium 3100 through the interface 3026, the connector 3030, the connector 3108 and the interface 3106 while management information about the sound data, such as the time of the sound recording and the time of sound-file creation, is recorded in the management data area 3102. Thus, image data indicative of a plurality of continuous images are recorded in combination with the associated sounds. Figs. 20 and 21 are flowcharts showing in combination the details of the reproducing operation executed in Step S3210 of Fig. 17. If an image to be reproduced is selected by setting an input button (not shown) or an input dial (not shown) or by external communication (Step S3241), the system controlling circuit 3050 reads out the necessary management information containing the time of photography by performing retrieval from the management data area 3102 of the recording medium 3100. On the basis of the read necessary management information, the corresponding image data is read from the information data area 3104, and is written into the image·sound memory 3024 through the interface 3106, the connector 3108, the connector 3030, the interface 3026 and the memory controlling circuit 3020. At this time, the read necessary management information containing the time of photography is stored in the memory 3052. Then, the image data is read from the image·sound memory 3024 through the memory controlling circuit 3020, and the read image data is subjected to D/A conversion in the D/A converter 3036. The analog image data is visually displayed on the image display device 3038 (Step S3242). At this time, if necessary, the image data is expanded by the compressing·expanding circuit 3022. If it is necessary to compress the image data to a signal suitable for display on the image display device 3038, as by reducing the number of pixels, the image data is compressed by the compressing·expanding circuit 3022. Then, retrieval is performed from the management data area 3102 of the recording medium 3100 to retrieve associated sound data to be combined with the selected image as well as a plurality of photographic images which are continuously recorded together with the selected image (Step S3243). The retrieval of the associated sound and the plurality of images is performed by comparing the time of photography of the selected image stored in the memory 3052 with the time of recording of the sound, which is read from the recording medium 3100. Such a retrieval operation will be described later in detail. The result of the retrieval (retrieved combination information or the absence of sound data to be combined) is displayed on the display device 3054 and on the image display device 3038 (Step S3244). Then, if sound data associated with the selected image is present (Step S3245) and if the sound start switch 3078 is turned on (Step S3246), reproduction of the associated sound data is started (Step S3247). The reproduction of the associated sound data is performed in the following manner. The management information is read out by performing retrieval from the management data area 3102 of the recording medium 3100, and the corresponding sound data (sound data associated with the plurality of photographic images continuously recorded together with the selected image) is read from the information data area 3104 on the basis of the management information and is written into the image·sound memory 3024 through the interface 3106, the connector 3108, the connector 3030, the interface 3026 and the memory controlling circuit 3020. Then, the sound data is read from the image·sound memory 3024 through the memory controlling circuit 3020 and the read sound data is subjected to D/A conversion in the D/A converter 3094, and the audio output device 3096 produces an audio output. At this time, if necessary, the sound data is expanded by the compressing·expanding circuit 3022. If the sound recording is forcedly stopped (Step S3249) or if all the sound data associated with the selected image are outputted (Step S3250), the reproduction and outputting of sound data is brought to an end (Step S3251). Then, if the next image is selected (Step S3252), the process returns to Step S3241, and similar processing is repeated in connection with the selected image. If the next image is not selected and if the main mode switch 3074 is not switched and the reproducing mode has not been turned off (Step S3253), the process returns to Step S3245 and the reproduction and outputting of sound data associated with the selected image as well as sound data associated with the plurality of photographic images recorded continuously together with the selected image is repeated. If the main mode switch 3074 is switched and the reproducing mode is turned off (Step S3253), the process returns to the main routine and the reproducing operation is thus brought to an end. Figs. 22 and 23 are flowcharts showing in combination the details of the transmission operation executed in Step S3211 of Fig. 17. If an image to be transmitted is selected by setting an input button (not shown) or an input dial (not shown) or by external communication (Step S3261), the system controlling circuit 3050 reads out the necessary management information containing the time of photography by performing retrieval from the management data area 3102 of the recording medium 3100. On the basis of the read necessary management information, the corresponding image data is read from the information data area 3104, and is written into the image·sound memory 3024 through the interface 3106, the connector 3108, the connector 3030, the interface 3026 and the memory controlling circuit 3020. At this time, the read necessary management information containing the time of photography is written into the memory 3052. Then, the image data is read from the image·sound memory 3024 through the memory controlling circuit 3020, and the read image data is subjected to D/A conversion in the D/A converter 3036. The analog image data is visually displayed on the image display device 3038 (Step S3262). At this time, if necessary, the image data is expanded by the compressing·expanding circuit 3022. If it is necessary to compress the image data to a signal suitable for display on the image display device 3038, as by reducing the number of pixels, the image data is compressed by the compressing·expanding circuit 3022. Then, retrieval is performed from the management data area 3102 of the recording medium 3100 to retrieve associated sound data to be combined with the selected image as well as a plurality of photographic images which are continuously recorded together with the selected image (Step S3263). The retrieval of the associated sound and the plurality of images is performed by comparing the time of photography of the selected image stored in the memory 3052 with the time of recording of the sound, which is read from the recording medium 3100. Such a retrieval operation will be described later in detail. The result of the retrieval (retrieved combination information or the absence of sound data to be combined) is displayed on the display device 3054 and on the image display device 3038 (Step S3264). Then, if sound data associated with the selected image is present (Step S3265), a combination of the selected image data and the plurality of photographic images recorded continuously together with the selected image and the associated sound data is set on the table of a file to be transmitted, which file is prepared in the memory 3052 (Step S3266). If sound data associated with the selected image is absent, only the selected image data is set on the table of the file to be transmitted, which file is prepared in the memory 3052 (Step S3267). Then, if a transmission start switch (not shown) is turned on (Step S3268), connection with a line is established and transmission of the file contents set on the table is started (Step S3269). The transmission of an image file and a sound file is performed in the following manner. The necessary management information is read out by performing retrieval from the management data area 3102 of the recording medium 3100, and the corresponding image data and sound data are read from the information data area 3104 on the basis of the management information and are written into the image·sound memory 3024 through the connector 3030, the interface 3026 and the memory controlling circuit 3020. Then, the image data and the sound data are read from the image·sound memory 3024 through the memory controlling circuit 3020 and the read image data and sound data are transmitted to an external device (not shown), such as a personal computer or a printer, through the interface 3026, the modem 3028, the connector 3034 and a cable (not shown) (Step S3270). At this time, if necessary, the image data and the sound data are expanded by the compressing·expanding circuit 3022 before transmission. If an error occurs during the transmission (Step S3271), each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3272). The processing of stopping the transmission is performed (Step S3274), and the connection with the line is cancelled to bring the transmission to an end (Step S3276). If the transmission is forcedly stopped (Step S3273) or if all the desired data are transmitted (Step S3275), the connection with the line is cancelled to bring the transmission to an end (Step S3276). Then, if the next image is selected (Step S3277), the process returns to Step S3261, and similar processing is repeated in connection with the selected image. If the next image is not selected and if the main mode switch 3074 is not switched and the transmission mode has not been turned off (Step S3278), the process returns to Step S3268 and the transmission of the image data and the sound data is repeated. If the main mode switch 3074 is switched and the transmission mode is turned off (Step S3278), the process returns to the main routine and the transmission operation is thus brought to an end. Thus, image data indicative of the plurality of images can be transmitted in combination with the associated sound data. Figs. 24 to 25 are flowcharts showing in combination one operational example, proper to the second embodiment, of the associated-sound retrieving operation executed in Step S3243 of Fig. 20 and in Step S3263 of Fig. 22. The system controlling circuit 3050 first reads management data, such as file name, file-creation time and file attribute, about a selected image file from the management data area 3102 of the recording medium 3100, and stores the read management data in the internal register or the memory 3052 (Step S3281). This storing operation is performed in the following manner. The necessary data is read from the management data area 3102 or the information data area 3104 and is written into the image·sound memory 3024 through the interface 3106, the connector 3108, the connector 3030, the interface 3026 and the memory controlling circuit 3020. After that, the written data is stored in the internal register of the system controlling circuit 3050 or the memory 3052 through the memory controlling circuit 3020. Then, all the management data are sequentially read from the management data area 3102 (Step S3282), and if the read data is a sound file (Step S3283), the time of the creation of the sound file is read (Step S3284). If the time of the creation of the sound file is earlier than the time of the creation of the image file (Step S3285), the sound file is classified as a before-sound file indicative of a sound file recorded before the selected image file (Step S3286). If the time of the creation of the read sound file is later than the time of the creation of the image file (Step S3285), the sound file is classified as an after-sound file indicative of a sound file recorded after the selected image file (Step S3287). Then, the time difference in file creation between the sound file and the image file stored in the internal register or the memory 3052 is computed (Step S3288). If the read data is not a sound file (Step S3283), the process proceeds to Step S3292 which will be described later. Then, if the time difference in file creation for each of the before- and after-sound files has not yet been stored (Step S3289), the time difference in file creation associated with the selected image file is stored in the internal register or the memory 3052 (Step S3291). If the time difference in file creation has been stored (Step S3289), the presently stored time difference in file creation and the presently computed time difference in file creation are compared with each other. If the presently computed time difference in file creation is small compared to the presently stored time difference in file creation (Step S3290), the presently computed time difference in file creation and the associated sound file are stored in the internal register or the memory 3052 (Step S3291). If the presently computed time difference in file creation is large compared to the presently stored time difference in file creation (Step S3290), the process skips Step S3291 and proceeds to Step S3292. In other words, the file name and the time difference in file creation of a sound file which shows the smallest time difference in file creation with respect to the selected image file are stored. If management data which has not yet been read from the management data area 3102 (particularly, a sound file) is present (Step S3292), the process returns to Step S3282 and reading of the management data is continued and similar processing is performed on the read sound file. If the stored data indicative of the time difference in file creation is absent (Step S3293), for example, if no sound file is present in the management data area 3102, each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3300). The process returns to the main routine and the associated-sound retrieving operation is thus brought to an end. If the stored data indicative of the time difference in file creation is present (Step S3293), sound files which are recorded before and after the selected image file and which are temporally closest to the selected image file are determined (Step S3294). Then, an image file recorded at an intermediate time between the times of creation of the two sound files recorded before and after the selected image file is determined. More specifically, an image file is read from the information data area 3104 by sequentially reading the management data from the management data area 3102 (Step S3295), and if an image file is detected which is recorded after the time of creation of a sound file within the before-sound file (Step S3296) and before the time of creation of a sound file within the after-sound file (Step S3297), it is determined whether the combination of this image file and the sound file within the after-sound file is inappropriate, on the basis of the value of the time difference in file creation regarding the sound file within the after-sound file (Step S3298). The combination inappropriateness determining operation will be described later. If it is determined that such combination is inappropriate, each of the display device 3054 and the image display device 3038 is made to provide a warning display (Step S3300). The process returns to the main routine and the associated-sound retrieving operation is thus brought to an end. On the other hand, if it is determined that such combination is appropriate, the file name of the aforesaid detected image file is stored (Step S3301). Then, if an image file which has not yet been read from the information data area 3104 remains (Step S3302), the process returns to Step S3295 and similar processing is repeated. In the above-described manner, from among a plurality of image files recorded at intermediate times between the times of creation of the two determined sound files before and after the selected image file, image files which are appropriately combined with a sound file within the after-sound file are sequentially stored. If the retrieval of the image files is completed (Step S3302), the process makes a decision to select the combination of the plurality of image files, which have been stored as image files which can be appropriately combined with the sound file within the after-soung file, and the sound file within the after-sound file (Step S3303). The process returns to the main routine and the associated-sound retrieving operation is thus brought to an end. Fig. 26 is a flowchart showing in detail the combination inappropriateness determining operation executed in Step S3298 of Fig. 25. The system controlling circuit 3050 first reads the file name and the time difference in file creation of the sound file stored in the internal register or the memory 3052, on the basis of the value of the time difference in file creation (Step S3311), and obtains the recording time period of the sound file (Step S3312). Then, if the time period of the time difference in file creation between the sound file and the image file is greater than the time period obtained by adding a predetermined value to the recording time period of the sound file (Step S3313), i.e., if it cannot be determined that photography and sound recording were executed at the same time and the recording of the sound file was performed subsequently to the recording of the image file, it is determined that the present combination is inappropriate, and an error flag is set (Step S3314). The process returns to the main routine and the combination inappropriateness determining operation is thus brought to an end. On the other hand, if the time period of the time difference in file creation between the sound file and the image file is less than the time period obtained by adding the predetermined value to the recording time period of the sound file (Step S3313), i.e., if it is determined that photography and sound recording were executed at the same time and the recording of the sound file was performed subsequently to the recording of the image file, it is determined that the present combination is appropriate, and the process returns to the main routine without setting the error flag. The combination inappropriateness determining operation is thus brought to an end. An electronic still camera to which a recording and reproduction device according to a third embodiment is applied will be described below. Since the arrangement of the electronic still camera is utterly identical to that of the eleventh embodiment shown in Fig. 1, description therof is omitted, and only an operation proper to the electronic still camera will be described below. In the operation of the twelfth embodiment, the operation shown in Figs. 27 and 28 is substituted for the operation, shown in Figs. 18 and 19 of the second embodiment. Since recording in the recording medium 3100 is performed while sound recording is being performed, the third embodiment can be usefully applied to the recording medium 3100 does not have a mechanical driving mechanism, as in the case of a memory card. Essential operations proper to the third embodiment will be described below with reference to only Figs. 27 and 28. The other operations are utterly identical to those which have been described in connection with the second embodiment. In Step S3321, it is determined whether the distance·light measuring switch 3062 has been turned on. If the distance·light measuring switch 3062 has not been turned on, the process returns to Step S3202. If the distance·light measuring switch 3062 has been turned on, the distance measuring circuit 3044 and the light measuring circuit 3046 are made to perform distance measurement and light measurement, respectively. Then, the photographic lens 3010 is focused on a subject by the lens driving circuit 3042 and a shutter time is determined (Step S3322). The distance·light measuring operation has previously been described in detail with reference to Fig. 50. The distance·light measuring operation is repeated until the release switch 3064 is turned on after the distance·light measuring switch 3062 is turned on (Steps S3321 to S3323). If the release switch 3064 is turned on (Step S3323) and if no recording has yet been started (Step S3324), the sound recording timer T is initialized to "0" and sound recording is then started (Step S3325). Simultaneously, photography is executed and the obtained image data is written into the image·sound memory 3024 (Step S3226). If the recording medium 3100 is provided with a mechanical driving mechanism, as in the case of a hard disk unit or the like, the system controlling circuit 3050 stops the rotation of the hard disk unit or the like prior to initiation of the sound recording and inhibits any access accompanied by a head travel, thereby preventing recording of a mechanical noise due to an operation of the hard disk unit or the like. The detail of the photographic operation has previously been described with reference to Fig. 5. When the photographic operation up to the writing of the image data is completed, the time of photography associated with the image is stored in the memory 3052 (Step S3327). Then, while the count value of the sound recording timer T is being cumulatively displayed, a sound signal from the microphone 3090 is taken out and the obtained sound data is written into the image·sound memory 3024 through the A/D converter 3092 and the memory controlling circuit 3020 (Step S3328). If the sound recording timer T reaches a predetermined value or is forcedly stopped, the writing of the sound data, i.e., sound recording, is brought to an end (Steps S3229, S3330 and S3334). If the sound recording is stopped, the recording time period is stored in the internal register and the memory 3052. The stopping of the sound recording is performed by turning off the release switch 3064 in the case of the mode in which sound recording is performed during the ON interval of the release switch 3064. In the case of the mode in which, even if the release switch 3064 is turned off, sound recording is continued until the desired time elapses, the stopping of the sound recording is performed, as by operating the sound mode switch 3076 or the sound start switch 3078. If photography in the continuous-shooting mode is to be continued during recording (Step S3331), the process proceeds to Step S3332. If it is determined in Step S3332 that there is a recordable area in the image·sound memory 3024, the process returns to Step S3321 and similar processing is performed on each photographic image. If it is determined in Step S3332 that there is no recordable area in the image·sound memory 3024, image data and the time of photography associated with the image data are respectively read from the image·sound memory 3024 and the memory 3052 under the control of the memory controlling circuit 3020. The image data and management information about the image data, such as the time of photography and the time of image-file creation, are recorded in the information data area 3104 of the recording medium 3100 and in the management data area 3102, respectively, through the interface 3026, the connector 3030, the connector 3108 and the interface 3106 (Step S3333). The process returns to Step S3321, and similar processing is repeated. After the sound recording has been stopped in Step S3334, it is determined whether all the image data in the image·sound memory 3024 have been recorded in the recording medium 3100 (Step S3335). If all the image data in the image·sound memory 3024 have not been recorded, the image data and the time of photography associated with the image data are respectively read from the image·sound memory 3024 and the memory 3052 under the control of the memory controlling circuit 3020. The image data are recorded in file form in the information data area 3104 of the recording medium 3100 through the interface 3026, the connector 3030, the connector 3108 and the interface 3106 while the time of photography, management information about the image data, and the like, are recorded in the management data area 3102 (Step S3336). Thus, the image recording operation of Step S3336 is repeated by the amount of the image data stored in the image·sound memory 3024 (Steps S3337). When the image recording on the recording medium 3100 is completed, the recording of the sound data is performed (Step S3338) and the process returns to Step S3202 of Fig. 17. The recording of the sound data is performed in the following manner. The sound data is read from the image·sound memory 3024 under the control of the memory controlling circuit 3020, and the sound data and the time period of sound recording are recorded in file form in the information data area 3104 of the recording medium 3100 through the interface 3026, the connector 3030, the connector 3108 and the interface 3106 while management information about the sound data, such as the time of the sound recording and the time of sound-file creation, is recorded in the management data area 3102. Thus, image data indicative of a plurality of continuous images are recorded in combination with the associated sounds. Although the first to third embodiments have been described, the present invention is not limited to these embodiments. For example, if there is a control file in which relation information indicative of the relation between an image file and a sound file is described, the above-described processing may be executed in accordance with the description of the control file. Only if there is no control file, as in the above-described embodiments, whether a combination of an image file and a sound file is appropriate may be determined on the basis of the time of file creation to determine the combination of the image file and the sound file so that processing such as reproduction or transmission can be performed. The present invention is applicable to not only a camera but also various other kinds of apparatus to which the aforesaid recording medium is attachable, such as a recording and reproducing apparatus, a reproducing apparatus, a transmission apparatus, a computer, a portable telephone set or an apparatus consisting of an arbitrary combination of them. The line used for transmission may be selected from a telephone line, an ISBN, a wireless line, a LAN, a WAN, an analog line, a digital and a line consisting of an arbitrary combination of them. Although the recording medium has been described as a recording medium which is separate from and connectable to the body of the recording apparatus, the recording medium may be fixed to (built in) the body of the recording apparatus. The present invention is also applicable to an arrangement in which two or more recording media are connectable to the body of the recording apparatus. Further, the present invention is applicable to an arrangement in which one or more recording media are fixed to the body of the recording apparatus and one or more recording media are arbitrarily connectable to the body of the recording apparatus. The recording medium is not limited to a hard disk unit or a memory card, and may be composed of a micro DAT, an optomagneto disk unit, an optical disk unit and the like. The recording medium may also be a composite recording medium in which a memory card and a hard disk unit are integrally assembled. The composite recording medium may also removably include a memory card part so that the memory card part can be arbitrarily connected to or separated from the body of the composite recording medium. Otherwise, the composite recording medium may also removably include a hard disk unit so that the hard disk unit can be arbitrarily connected to or separated from the body of the composite recording medium. Of course, the composite recording medium may be composed of two or more kinds of recording media selected from among the hard disk unit, the memory card, the micro DAT, the optomagneto disk unit, the optical disk unit and the like. As is apparatus from the above detailed description, in accordance with the recording and reproduction processing apparatus according to the present embodiments, whether a combination of image data and sound data is appropriate is determined on the basis of the time of file creation (the time of data recording) to determine the combination of the image data and the sound data so that processing such as reproduction or transmission is performed. Accordingly, even if there is no information indicative of the correspondence between the image data and the sound data, the image data can be optimumly combined with the sound data to execute reproduction or transmission.

Claims: A reproducing apparatus for reproducing still image data and audio data from a recording medium on which the still image data and the audio data are respectively recorded at different times along with information data indicative of the respective recording times at which the still image data and the audio data are respectively caused to start to be recorded on said recording medium, said apparatus comprises detecting means for detecting the respective recording times for both the still image data and the audio data to be respectively reproduced from said recording medium, on the basis of the said information data recorded on said recording medium along with the still image data and the audio data; determining means for determining whether the combination of the still image data and the audio data is appropriate for reproducing the still image data and the audio data, on the basis of the difference between the recording time for the still image data and the recording time for the audio data both times being detected by said detecting means; and reproducing means for reproducing from said recording medium and for outputting the still image data and the audio data when the combination of the still image data and the audio data is determined to be appropriate by said determining means for reproducing the still image data and the audio data. A reproducing apparatus according to claim 1, characterized in that said determining means is so arranged that when, in the collection of all of the recording times for all sets of the still image data and audio data recorded on said recording medium the collection including the two detected respective recording times for both the still image data and the audio data, the detected recording time for the still image data to be selected from among all of the recording times for all sets of the still image data extracted from the collection is closest in the sense of absolute value norm to the detected recording time for the audio data to be selected from among all of the recording times for all sets of the audio data extracted from the collection, the combination of the still image data and the audio data is determined to be appropriate for reproducing the still image data and the audio data. A reproducing apparatus according to claim 1, characterized in that said determining means is so arranged that when, in the collection of all of the recording times for all sets of the still image data and audio data recorded on said recording medium the collection including the two detected respective recording times for both the still image data and the audio data, the detected recording time for the audio data to be selected from among all of the recording times for all sets of the audio data extracted from the collection is earliest to come subsequently to the detected recording time for the still image data to be selected from among all of the recording times for all sets of the still image data extracted from the collection, the combination of the still image data and the audio data is determined to be appropriate for reproducing the still image data and the audio data. A reproducing apparatus according to claim 1, characterized in that the information data recorded on said recording medium further contains an audio data recording time period that is a period of time during which the audio data is recorded and said detecting means is further so arranged as to detect the audio data recording time period contained in the information data, and in that said determining means is so arranged that the combination of the still image data and the audio data is determined to be inappropriate for reproducing the still image data and the audio data when the difference between the recording time for the still image data and the recording time for the audio data both times being detected by said detecting means is longer than the total time of both an audio data record starting allowance time period, that is a period of time during which the audio data is allowed to start to be recorded and that is set at the time of starting to record the still image data, and the audio data recording time period detected by said detecting means. A reproducing apparatus according to claim 1, characterized in that the information data recorded on said recording medium further contains an audio data recording time period that is a period of time during which the audio data is recorded and said detecting means is further so arranged as to detect the audio data recording time period contained in the information data, and in that said determining means is so arranged that the combination of the still image data and the audio data is determined to be inappropriate for reproduction when the difference between the recording time for the still imaged data and the recording time for the audio data both times being detected by said detecting means is longer than the audio data recording time period detected by said detecting means. A reproducing apparatus according to claim 1, characterized in that the information data recorded on said recording medium further contains an audio data recording time period that is a period of time during which the audio data is recorded and said detecting means is further so arranged as to detect the audio data recording time period contained in the information data, and in that said determining means is so arranged that the combination of a plurality of sets of the still image data said sets being sequentially recorded and the audio data is determined to be inappropriate for reproducing the plurality of sets of the still image data and the audio data when the difference between each recording time for the plurality of sets of the still image data and the recording time for the audio data being detected by said detecting means is longer than the audio data recording time period contained in the information data detected by said detecting means. A reproducing apparatus according to claim 1, characterized in that said apparatus further comprises transmitting means for transmitting the still image data and the audio data reproduced from said recording medium. A reproducing apparatus according to claim 1, characterized in that said apparatus is arranged not to reproduce from said recording medium the still image data and the audio data when the combination is determined to be inappropriate by said determining means for reproducing the still image data and the audio data, and in that said apparatus is arranged to produce from said recording medium the still image data and the audio data when the combination of the still image data and the audio data is determined to be appropriate by said determining means for reproducing the still image data and the audio data.

Inventors: YAMAGISHI YOICHI, YAMAGISHI, YOICHI
Applicants: CANON KK, CANON KABUSHIKI KAISHA
Application year: 1993
Main classification: H04N1
IPC codes: H04N1, G11B19, G11B27, H04N5, F02B75