Optical disc recording device

Abstract: An optical disc (7) and an optical disc recording device for recording such data as tune number, starting time ending time, etc., based on data signals recording in a recording region, in a read-in area AR RI of the recording region, wherein expanding recording regions AR EXI , AR EXO are provided on the inner peripheral side and/or the outer peripheral side other than the recording region in addition to the recording region of the optical disc (7), so that any data can be recorded in the expanded recording regions AR EXI , AR EXO .

Description: The present invention relates to an optical disc recording apparatus which records a desirable information signal according to the recording format of, for example, a write once type compact disc and a write once type optical disc thereof. An optical disc recording apparatus has been proposed so far, in which an information signal is recorded on a write once type disc, i.e. so-called WO (write once) type disc according to the compact disc (CD) standard so that a musical information or the like is recorded so as to have a compatibility with the CD upon reproduction. In actual practice, according to the CD standard, the optical disc is 120 mm in diameter, and a recording area encircled by a circle having a diameter of 50 mm and a circle having a diameter of 116 mm on the optical disc is defined as a program recording area in which a musical information or the like is recorded. In addition, an area of 2 mm wide in the inner peripheral side of the program recording area (i.e. area encircled by a circle having a diameter of 46 mm and a circle having a diameter of 50 mm) and an area of 1 mm wide in the outer peripheral side of the program recording area (i.e. area encircled by a circle having a diameter of 116 mm and a circle having a diameter of 118 mm) on the disc are defined as a lead-in area and a lead-out area, respectively. Music number, start time, end time and so on for a musical information recorded in the program recording area are recorded particularly in the lead-in area as a TOC (table of contents) information and used as data to perform various operations in the reproduction such as search reproduction, program reproduction and the like and to control the operation of the apparatus side. Accordingly, in the above-described optical disc recording apparatus, when a desirable musical information is recorded in the program recording area of the WO type optical disc, music number, start time and end time of the musical information are sequentially stored in an internal memory. Then, at the completion of the recording, the contents of the internal memory are recorded in the lead-in area of the optical disc as the TOC information, thereby forming the WO type optical disc having a compatibility with the CD standards upon reproduction. In the thus arranged optical disc recording apparatus, if the recording of information signal on the program recording area of the WO type optical disc is interrupted temporarily, the TOC information is recorded in the lead-in area as described above. There is then the substantial disadvantage that a new information signal cannot be recorded again in a vacant area of the program recording area after the interruption without difficulty. As a result, the user has to temporarily record a recording musical information or the like in an audio tape or the like in the complete state by a time period corresponding to the recordable area of the program recording area prior to the recording, which is still inconvenient for the user upon use. JP-A-63 87657 discloses an optical disc recording system having features similar to the pre-characterising portion of claim 1. However, upon recording, the beam irradiated by an optical head is moved inside a marker area of the disc and it is detected on the basis of the reproduced output of the optical head whether or not an informational signal is already recorded on the disc. An object of the present invention is to provide an optical disc recording apparatus which can solve the problems encountered with the prior art and which can be made more useful for the user. According to the present invention there is provided an optical disc recording apparatus for recording a desired information signal in a program area of a recording area of a write-once type optical disc and for recording table of content data, based on said desired information signal recorded in the program area, in a further area of the recording area at the end of recording said desired information signal in the program area, the apparatus comprising control means for controlling the apparatus to record said table of content data in a predetermined area, outside of said recording area, of the optical disc if recording is interrupted prior to the end of recording said desired information signal in the program area, characterised in that the control means controls the apparatus such that, at the start of a recording operation, the apparatus reproduces the content of said further area of the recording area and, if the reproduced output indicates that table of content data is already recorded in said further area, the recording operation is ended, whereas, if the reproduced output indicates that table of content data is not yet recorded in said further area, the apparatus reproduces the content of said predetermined area outside of the recording area and performs the recording operation on the basis of the reproduced result. In an embodiment of the present invention, in an optical disc recording and reproducing apparatus 1 which records information AD IN in recording areas AR RI , AR REC and AR RO of the optical disc 7, in addition to the recording areas AR RI , AR REC and AR RO of the optical disc 7, information DT REC and DT ADD are recorded in predetermined areas AR EXI and AR EXO other than the recording areas AR RI , AR REC and AR RO . The areas AR EXI and AR EXO may be provided at inner and outer peripheral sides of the recording areas AR RI , AR REC and AR RO . The information DT REC and DT ADD is recorded in the predetermined areas AR EXI and AR EXO outside of the recording areas AR RI , AR REC and AR RO of the optical disc 7 standardised in the reproduction side so that, regardless of the standards at the reproduction side, various recording information DT REC and DT ADD can be recorded on the optical disc 7. BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is a block diagram showing an arrangement of an embodiment of an optical disc recording and reproducing apparatus according to the present invention, Fig. 2 is a schematic plan view illustrating an embodiment of an optical disc used with the apparatus of fig.1 Fig. 3 is a flow chart of a recording procedure executed by the optical disc recording and reproducing apparatus, and Fig. 4 is a flow chart of an additional information recording procedure executed by the optical disc recording and reproducing apparatus. An embodiment of the present invention will hereinafter be described with reference to the drawings. In Fig. 1, reference numeral 1 generally designates an optical disc recording and reproducing apparatus, wherein when the user performs the recording operation by using an operation/display apparatus 2, data of this operation is supplied to a control circuit 3 as control data DT CNT . The control circuit 3 is formed of a microcomputer including such as a CPU and places the optical disc recording and reproducing apparatus 1 in the recording mode when the control data DT CNT which commands the recording is supplied thereto. Under this condition, recording data DT REC supplied from the control circuit 3 is inputted to a record processing circuit 4 together with input audio signal AD IN inputted thereto externally and they are thereby processed in a predetermined recording signal processing manner such as a modulation or the like. A resultant recording signal S REC is supplied to an optical pickup 5. This optical pickup 5 is comprised of a light source formed of a semiconductor laser element, light receiving means formed of such as a photo-detector and optical parts forming an optical system such as an objective lens or the like. A laser beam L₁ whose illumination state is controlled in response to the recording signal S REC is illuminated on an optical disc 7 which is rotated about an axis 6 by rotational driving means not shown according to a constant linear speed (CLV (constant linear velocity)) system, whereby the recording data DT REC and/or the input audio signal AD IN is recorded on the optical disc 7. When the user performs the reproduction operation by using the operation/display apparatus 2, data of this reproduction operation is supplied to the control circuit 3 as control data DT CNT so that the control circuit 3 sets whole of the optical disc recording and reproducing apparatus 1 in the reproduction mode. Under this condition, the optical pickup 5 illuminates the optical disc 7 with the reproducing laser beam L₁ and receives a reflected-back light therefrom. A reproduced signal S PB formed of the resultant received output is supplied to a reproduction processing circuit 8. In the reproduction processing circuit 8, the reproduced signal S PB is processed in a predetermined reproduced signal processing manner such as a demodulation or the like and is fed to the control circuit 3 as reproduced data DT PB . Also, this reproduced signal is transmitted to the outside as an output audio signal AD OUT . This optical disc 7 is formed of a write once type (WO) optical disc which is constructed according to the compact disc (CD) standard as shown in Fig. 2. More specifically, the optical disc 7 is 120 mm in diameter, and a recording area encircled by a circle having a diameter of 50 mm and a circle having a diameter of 116 mm on the optical disc 7 is utilized as a program recording area AR REC in which the information signal AD IN such as the musical information or the like is recorded. In addition, an area of 2 mm wide in the inner peripheral side of the program recording area AR REC and an area of 1 mm wide in the outer peripheral side of the program recording area on the optical disc 7 are defined as a lead-in area AR RI and a lead-out area AR RO , respectively. Further, in the case of the optical disc 7 according to this embodiment, areas outside the CD standards and one of which is 1 mm wide of the inner peripheral side of the lead-in area AR RI (i.e. area encircled by a circle having a diameter of 44 mm and a circle having a diameter of 46 mm) and the other of which is 0.5 mm wide of the outer peripheral side of the lead-out area AR RO (i.e. area encircled by a circle having a diameter of 118 mm and a circle having a diameter of 119 mm) are defined as first and second extended recording areas AR EXI and AR EXO , which are used as a TOC information temporary recording area and an additional information recording area, respectively. In accordance with the aforementioned arrangement, in the case of this optical disc recording and reproducing apparatus 1, if the user carries out the recording operation by using the operation/display apparatus 2, data of this recording operation is supplied to the control circuit 3 as the control data DT CNT , and at this timing, the CPU in the control circuit 3 executes a record processing program SP1 shown in Fig. 3. That is, if the user performs the recording operation, the CPU in the control circuit 3 enters the record processing program SP1 and awaits, in the next step SP2, the setting of the optical disc 7. Under this condition, if the optical disc 7 is set in the recording and reproducing apparatus, the CPU proceeds to the next step SP3 wherein the content of the lead-in area AR RI of the optical disc 7 is read out. In actual practice, under the control of the CPU, after the optical pickup 5 is moved to the position corresponding to the lead-in area AR RI of the optical disc 7 by a feeding device not shown, the optical disc 7 is illuminated with the reproducing laser beam L₁ and the reproduced signal S PB , which results from receiving the reflected-back light by the photodetector, is read in as reproduced data DT PB via the reproduction processing circuit 8, thereby reading-out the contents of the lead-in area AR RI of the optical disc 7. In the next step SP4, it is determined by the CPU whether or not the TOC information is recorded in the lead-in area AR RI thus read-out. If a NO is output at step SP4 (which fact means that the recording is possible because the TOC information is not yet recorded in the optical disc 7), the CPU executes the next step SP5. In step SP5, the CPU reads-out the contents of the first extended recording area AR EXI at the inner peripheral side of the lead-in area AR RI similarly as described above. Then, it is determined at the next step SP6 whether or not the TOC information is recorded in the first extended recording area AR EXI . If a NO is output at step SP6 (which fact means that no information signal is recorded in the optical disc 7 at all), in the next step SP7, the CPU controls the optical pickup 5 so that the optical pickup is moved to the start position of the program recording area AR REC on the optical disc 7 by the feed device. Then, the optical pickup 5 is set in the standby mode at this start position under this condition, the routine proceeds to the next step ST10. If a YES is output at step SP6 (which fact means that the information is already recorded in the optical disc 7 up to its mid portion), the CPU proceeds to step SP8, in which the contents of TOC information of the first extended recording area AR EXI are written in a memory circuit 9 formed of a RAM (random access memory). In the next step SP9, the CPU controls the optical pickup 5 such that the optical pickup is moved to the end position of the previously-recorded area of the program recording area AR REC on the optical disc 7. Under this condition, the optical pickup 5 is set in the standby mode and the routine proceeds to the next step SP10. In step SP10, under the control of the CPU, the input audio signal AD IN is supplied through the record processing circuit 4 to the optical pickup 5 as the recording signal S REC and the optical pickup 5 is sequentially moved from the position at which the optical pickup is set in the standby mode at step ST7 or step SP9, whereby the recording is started and the musical number, starting time and ending time are sequentially written in the memory circuit 9, thus the recording processing for the optical disc 7 being executed. After the recording processing is ended, the CPU proceeds to the next step SP11 in which it awaits the input of an ending command. The ending command is used to effect the TOC recording operation which represents the end of the recording processing or the STOP operation which represents the interruption of recording operation onto the program recording area AR REC . Under this condition, if the user inputs the ending command by using the operation/display apparatus 2, the CPU proceeds to step SP12, in which the kind of incoming ending commands is identified. If the input ending command represents the TOC recording operation, the CPU proceeds to next step SP13 wherein the contents of the memory circuit 9 are recorded in the lead-in area AR RI of the optical disc 7 as the TOC information. Thereafter, the recording processing program SP1 is ended in the next step SP14. As described above, the optical disc 7 can be formed, which has a compatibility with the CD upon reproduction. If the input ending command represents the STOP operation, the CPU proceeds to the next step SP15 wherein the contents of the memory circuit 9 are recorded in the first extended recording area AR EXI of the optical disc 7 as the TOC information. Then, the recording processing program SP1 is ended at the next step SP14, and in this way, the recordable optical disc 7 can be obtained. When an YES is obtained at step SP4, the CPU determines that the optical disc 7 can be made to have a compatibility with the CD upon reproduction. Thus, the CPU causes the optical recording and reproducing apparatus 1 to be moved in the reproduction mode (STEP SP16), and then, in the step SP14, the recording processing program SP1 is ended. In the case of the optical disc recording and reproducing apparatus 1 of this embodiment, in addition to the above-described recording processing, a desirable additional information can be recorded in the second extended recording area AR EXO provided at the outer peripheral side of the lead-out area AR RO of the optical disc 7. If the user carries out the additional information recording operation by using the operation/display apparatus 2, data of this operation is supplied to the control circuit 3 as the control data DT CNT , whereby the CPU in the control circuit 3 enters additional information recording processing program SP20 shown in Fig. 4 at this timing, and in the next step SP21, awaits that the optical disc 7 is set in the recording and reproducing apparatus. Under this condition, if the optical disc 7 is set in the recording and reproducing apparatus, the CPU proceeds to step SP22 in which the optical pickup 5 is moved by the feed device to read the contents of the second extended recording area AR EXO . In the next step SP23, it is determined whether or not the read-out recorded information is recorded already. If a NO is output at step SP23 (which fact means that new additional information can be recorded because the recording information is not recorded in the second extended recording area AR EXO ), the CPU proceeds to the next step SP24 in which it awaits the selecting operation of the additional information. In actual practice, the optical recording and reproducing apparatus 1 can select as the additional information data DT ADD a clock information obtained from a clock circuit 10, a title information obtained from a keyboard 11 or a serial number information or the like from a serial number memorizing circuit 12 formed of a ROM (read only memory). Accordingly, under this condition, if the user executes the selecting operation of predetermined additional information data DT ADD by using the operation/display apparatus 2, the CPU proceeds to the next step SP25 wherein the additional information data DT ADD corresponding to the selecting operation done by the operation/display apparatus 2 is written in the memory circuit 9. In the next step SP26, the CPU records the contents of the memory circuit 9 in the second extended recording area AR EXO of the optical disc 7 by using the optical pickup 5, and in the next step SP27, the additional information recording processing program SP20 is ended. If a YES is output at the step SP23 (which fact means that the new additional information cannot be recorded because the recording information is already recorded in the second extended recording area AR EXO ), the routine proceeds to the next step SP28 in which the previously-recorded recording information is transmitted to the operation/display apparatus 2 as display data DT DSP and displayed. Then, in step SP27, the additional information recording processing program SP20 is finished. As described above, desirable additional information can be recorded in the second extended recording area AR EXO . According to the thus made arrangement, since the extended recording areas AR EXI and AR EXO are provided at the inner and outer peripheral sides of the recording areas AR RI , AR REC and AR RO standardized in the reproduction side on the basis of the CD standards, the TOC information, which is provided according to the CD standards, can be temporarily recorded on the optical disc 7 at its area outside of the CD standards and the desirable additional information can be recorded on the optical disc 7 at its area outside of the CD standards. Therefore, the expandability can be improved considerably and the optical disc recording-apparatus and the optical disc can be realized, which can be very convenient for the user. While in the above-described embodiment the optical disc and the optical disc recording apparatus according to the CD standards are described, the present invention is not limited thereto and can be widely applied to various optical discs and those based on other standards, for example, a laser disc (LD), CD single (compact disc having a diameter of 8 cm) or the like and to an optical disc recording apparatus using such optical disc. As described above, according to this embodiment of the present invention, since information is recorded in the predetermined areas outside of the standardised recording areas of the optical disc, it is possible to realise optical disc recording apparatus of simplified arrangement by which various recording information can be recorded on the optical disc regardless of the standards of the existing disc. Thus, it is possible to realise an optical disc recording apparatus in which the expandability can be increased and which can be made more convenient for the user in use.

Claims: An optical disc recording apparatus (1) for recording a desired information signal in a program area (AR REC ) of a recording area of a write-once type optical disc (7) and for recording table of content data, based on said desired information signal recorded in the program area (AR REC ), in a further area (AR RI ) of the recording area at the end of recording said desired information signal in the program area (AR REC ), the apparatus comprising control means (3) for controlling the apparatus to record said table of content data in a predetermined area (AR EXI ), outside of said recording area, of the optical disc (7) if recording is interrupted prior to the end of recording said desired information signal in the program area (AR REC ), characterised in that the control means (3) controls the apparatus such that, at the start of a recording operation, the apparatus reproduces (SP3) the content of said further area (AR RI ) of the recording area and, if the reproduced output indicates that table of content data is already recorded in said further area (AR RI ), the recording operation is ended (SP16), whereas, if the reproduced output indicates that table of content data is not yet recorded in said further area (AR RI ), the apparatus reproduces (SP5) the content of said predetermined area (AR EXI ) outside of the recording area and performs (SP6) the recording operation on the basis of the reproduced result. Apparatus according to claim 1, wherein said predetermined area (AR EXI ) is provided at the inner peripheral side of said recording area. Apparatus according to claim 1 or claim 2, wherein said table of content data comprises at least program number, starting time and ending time of programs in said information signal recorded in said program area (AR REC ) of the optical disc (7). Apparatus according to any one preceding claim, wherein, when table of content data is reproduced from said predetermined area (AR EXI ), the control means (3) controls the apparatus such that the apparatus starts the recording operation from a previous recording ending point in said program area (AR REC ) as determined by the reproduced table of content data. Apparatus as claimed in any preceding claim, wherein the control means (3) is arranged for controlling the apparatus to record additional data (DT ADD ) in a second predetermined area (AR EXO ), outside of said recording area and said predetermined area (AR EXI ), of the optical disc (7). Apparatus as claimed in claim 5, wherein, at the start of an operation for recording data in said second predetermined area (AR EXO ), the control means (3) controls the apparatus to reproduce (SP22) the content of the second predetermined area (AR EXO ) and, if the reproduced output indicates that additional data (DT ADD ) is already recorded in the second predetermined area (AR EXO ), the recording operation is ended. Apparatus as claimed in claim 5 or claim 6, wherein the second predetermined area (AR EXO ) is provided at the outer peripheral side of said recording area.

Inventors: HOTORI MASAHIRO SONY CORPORATI, OGAWA HIROSHI SONY CORPORATION, SAKO YOICHIRO SONY CORPORATION, HOTORI, MASAHIRO SONY CORPORATION, OGAWA, HIROSHI SONY CORPORATION, SAKO, YOICHIRO SONY CORPORATION
Applicants: SONY CORP, SONY CORPORATION
Application year: 1990
Main classification: G11B27
IPC codes: G11B27, G11B7, G11B20