Source: https://russianpatents.com/patent/224/2249259.html
Timestamp: 2019-10-15 17:37:59
Document Index: 385534888

Matched Legal Cases: ['§ 42', '§ 51', '§ 42', '§ 42', '§ 51', '§ 51', '§ 51', '§ 51', '§ 51']

Optical data carrier, device and recording method for optical data carrier, and device and playback method for optical data carrier
G11B7/013 - Optical detectors therefor
The present invention relates to optical recording media suitable for use with an optical disk such as a CD-ROM to the device and the recording method for optical recording media and to a device and method of play for optical recording media.
Compact disc (hereinafter abbreviated as CD (CD)) is widespread as an optical disk. In CD audio data is sequentially divided into blocks, which are subjected to encoding using a code, error-correcting, and then they are subjected to EFM modulation (modulation type eight to fourteen (conversion of primary 8-bit code in a 14-bit code to reduce the density of the grooves on the optical disk, and improve noise immunity)), and the modulation recorded by the NRZI modulation (modulation without return to zero inversion).
In the EFM modulation, during the reference period T, which serves as a quantum channel, the audio data is written to disk by repeating grooves and areas that have nine values of lengths from 3T to 11T, where the unit is used the reference period T. In the case of KD each notch has a length of approximately from 0,87 to 3.18 [μm], which corresponds to the range from 3T to 11T, while Shire is the indentations is approximately 0.5 [μm] and a depth of approximately 0.1 [μm].
The audio data recorded on CD represent two-channel data, in which the sampling frequency is 44.1 [kHz], and the number of quantization bits is 16. However, you also want to realize more high quality sound and multichannel capability. In this case, it is necessary to ensure compatible playback, thanks to which audio data can be reproduced by an existing CD player. While it is desirable that the duration of a sound program that can be recorded on one CD, it would not have become shorter due to the higher sound quality and multi-channel. In addition, as currently in KD is not used technology to prevent copying for copyright protection, data can be illegally copied.
The present invention was made in view of this situation, and is directed to an optical recording medium, in which the time duration of the recorded program does not become shorter, ensures compatibility playback can be implemented in a higher sound quality can be ensured protection of copyright and, in addition, can be expanded range of use optical media like CD or similar media. The present invention also aims to give the creation and the recording method for such an optical recording medium and apparatus and method of play for such optical media.
The invention according to claim 1 is directed to an optical recording medium having tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data to be written, and the intervals between the grooves, wherein a set of grooves deviates from the center of the track based on the second data, and the grooves intersect the Central position of the track at a predetermined interval.
The invention according to claim 9 is directed to a recording device for optical recording media, comprising: a light source that is designed for the formation of the recording laser beam; a light modulator that is designed to modulate the recording laser beam coming from the light source based on the supplied first data; a light deflector that is designed to reject the modulated recording laser beam coming from the light modulator, based on the supplied second data in the direction which almost perpendicularly intersects the direction of scanning the modulated recording laser beam of the optical recording medium; and a lens designed to focus the modulated recording laser beam coming from the light deflector, on the optical recording medium, with the notches intersect the Central position of the track at a predetermined interval.
The image is a buy on 14 directed to the playback device, designed for optical recording medium having tracks, each of which is composed of a set of grooves that are formed on the basis of the first data designed to capture, and areas between the slots, comprising: an optical read head of the first data and second data from optical recording media, on which a lot of fill was applied offset from the center of the track based on the second data; a first demodulate unit designed for demodulating the first data on the optical recording medium based on the output signal of the optical head reading; and second demodulate unit designed for demodulation of the second data on the optical recording medium on the basis of the output signal of the optical head reading, with grooves intersect the Central position of the track at a predetermined interval.
The invention according to item 21 is directed to the playback device designed for optical recording medium having tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the slots, comprising: an optical read head, designed for reading the first data and second data from optical recording media, on which a lot of fill was put on what chleneniem from the center of the track based on the second data; first demodulate unit designed for demodulating the first data on the optical recording medium based on the output signal of the optical head reading; second demodulate unit designed for demodulation of the second data on the optical recording medium based on the output signal of the optical read head; and a control unit designed to control the operation of the second demodulateur unit based on the identification data read from the optical recording medium of the optical read head, with grooves intersect the Central position of the track at a predetermined interval.
The invention p directed to an optical recording medium comprising: a data recording area having a spiral track, composed of multiple grooves, which are formed on the basis of the first data that are subjected to predetermined modulation and recorded, and areas between the grooves; and the area management data that records the management information of the first data written in the recording area data in which multiple grooves are applied with a deviation from the center of the track based on the second data, and the grooves intersect the Central position of the track at a predetermined interval.
The invention according to § 42 is directed to a method of recording intended for protected areas the ical recording media, which includes the following steps: modulation of the recording laser beam coming from the light source, based on the supplied first data; deviation of the modulated recording laser beam on the basis of the supplied second data in the direction which almost perpendicularly intersects the direction of scanning the modulated recording laser beam of the optical recording medium; and focusing the modulated and rejected the recording laser beam on an optical recording medium using the lens, while the notches intersect the Central position of the track at a predetermined interval.
The invention according to item 45 is directed to a method of playback for an optical recording medium having tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the grooves containing the following steps: reading the first data and second data from optical recording media, on which a lot of fill was deposited with the deviation from the center of the track based on the second data; demodulating the first data based on the data read from the optical recording medium; and demodulating the second data based on the data read from the optical recording medium, with the notches cross the Central position of the track given what eriodically.
The invention according to § 51 is directed to the method of play for optical recording media, which contains paths, each of which is composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the grooves, and in which many notches marked deviation from the center of the track based on the second data, and which were recorded identifying information, containing the following steps: first demodulation data based on the data read from the optical recording medium; and demodulating the second data based on the data read from the optical recording medium in accordance with a result of identification identifying data read from the optical recording medium, with the notches intersect the Central position of the track at a predetermined interval.
Figure 1 depicts a block diagram of a variant of implementation of the recording device in accordance with the present invention;
Figa - 2D - diagram intended to explain the way data in this embodiment of the present invention;
Figure 3 is a block diagram of a variant of implementation of the playback device in accordance with the present invention;
4 is a diagram intended to explain the example of reading in the playback device;
IG - the scheme, intended to clarify the data CD-ROM, which can be applied to the present invention;
6 is a diagram intended to explain the offset recesses in this embodiment of the present invention;
Figa and 7B is a diagram intended to illustrate an example process of modulation of the second data, which can be used in the present invention;
Fig diagram intended to explain the multi-valued recording method that can be used in the present invention.
One of the embodiments of the present invention will be described below with reference to the drawings. This implementation applies to the example in which the present invention is applied to an optical disk such as CD. Figure 1 shows a recording device for an optical disk, which is used in the manufacture of optical disks. In this embodiment, after the processing of the parent disk 2 is exposed by using a recording device on the optical disk is subjected to the electrotype process, so that formed the parent disk, namely the matrix. In the further process of optical discs are produced using this matrix.
Maternal disk 2, which was subjected to exposure, which is to be for example, using a coating of sensitive material (photoresist) on a flat glass substrate. The motor 3 rotates the parent disk 2 running scheme 4 servo. The generator frequency signal, depicted in the lower part, generates a frequency signal FG, the level of which increases in proportion to a predetermined angle of rotation of the motor 3. Scheme 4 servo controls the electric motor 3 so that the signal FG is set at a predetermined frequency, allowing the parent disk 2 rotates at a constant linear velocity (MLS (CLV)).
Maternal disk 2, which was subjected to exposure as described above, is formed by coating of, for example, the sensitive material (photoresist) on a flat glass substrate. The motor 3 rotates the parent disk 2 running scheme 4 servo. When this generator signal FG is indicated in the lower part, generates a frequency signal FG, the level of which increases in proportion to a predetermined angle of rotation of the motor 3. Scheme 4 servo controls the electric motor 3 so that the frequency signal FG is set to a predetermined frequency, allowing the parent disk 2 is rotated at constant linear velocity.
Laser , intended for recordings made on the basis of gas or equivalent, laser and emits a laser beam with a predetermined power level of light. The light modulator 6 is made on the basis of the electro optical device or similar device, and the laser beam L emitted from the recording laser 5, is controlled by on/off in accordance with the control signal S3. The laser beam from the light modulator 6 is supplied to the mirror 8.
Mirror 8 deflects the optical path of the laser beam L, for example, 90° so that the laser beam is directed to the parent disk 2. Lens 9 focuses the light reflected from the mirror 8 to a recording surface of the parent disk 2, namely, on the sensitive material, deposited in the form of a coating on the recording surface. The displacement of the mirror 8, is offset in a direction that crosses the direction of the track, namely, in the radial direction of the parent disk 2, is controlled by the control signal S4, which is supplied from the drive circuit 7. That is, the recess, which is formed on the mother disk 2, is offset from the direction of the write data, namely, the right or left in a radial direction of the parent disk 2. The amount of displacement of the grooves is set in the range in which the laser beam is designed for playback, not the renunciation is it in a position deviating from the track during playback, in other words, in a predetermined range in which the notch caused by deviation, can be read.
The mirror 8 and the lens 9 is sequentially moved by a screw mechanism (not shown) in the radial direction of the parent disk 2 synchronously with the rotation of the parent disk 2. Thus, the recording on the optical disc sequentially shifts the focus position of the laser beam L toward the outer perimeter of the parent disk 2, thus forming a spiral track on the mother disk 2. On the track is formed by a sequence of slots, corresponding to the modulating signal S3, namely, a sequence of slots, offset from the centre track was modulated by a modulating signal S4 supplied from the drive circuit 7.
In addition to the mirror 8 to move the notch to the right or left from the direction of the account may be used a light deflector. For example, the recording laser beam can be deflected using AOD (AOD) (acousto-optic deflector) or EOD (EOD) (electro-optical deflector).
The audio signal SA, which comes from a pre-defined musical source, namely, an analog audio signal, is supplied here in scheme 10 analog-to-digital (a/d) (A/D) Converter. Scheme 10 A/d Converter preobraze the audio signal SA from analog to digital form and supplies the audio data DA with a sampling frequency of 44.1 [kHz] in a parallel 20-bit code.
Unit 11 bit processing divides the 20-bit parallel audio data DA to the audio data D2U, which contain 16 bits, and the audio data D2L, which contain the least significant 4 bits, and outputs them. Thus, the block 11 bit processing separates the audio data D2U, the sound quality which is equivalent to the standard CD, the audio data DA, and produces data D2L, designed to improve quality, which can improve the sound quality of audio data D2U by adding data D2L to the separated audio data D2U.
Scheme 12 data inputs (TOC (table of contents), which are recorded on the zero track is similar to the existing CD-ROMs, and processes data in accordance with the format specified for the CD-ROM drive. The circuit 12, the data forms a data channel corresponding to the sequence of slots, and outputs them.
The data ID (ID) identification of the disk, indicating that the recorded data D2L, designed to improve the quality, and the data IR (IC) identification of copies of that point on the original CD, which was formed from the matrix, are placed in THE data that is recorded as described above. Thus, in accordance with this embodiment of the present invention when vos is proizvedenii audio data DA, which were divided into upper 16 bits and lower 4 bits and processed, can be reproduced on the basis of the detection data ID identifying the disk. You can determine whether the original disk, optical disk, or copied to the optical disk on the basis of IR data identifying the copy.
Scheme 12 data processing similar to the processing of audio data D2U high 16 bits that come from the processing block 11 bits in accordance with the same format as the existing CD-ROM, generates data D3 channel, the corresponding sequence of slots, and outputs them.
That is, the circuit 12 data adds the error correction code or similar to audio data D2U and then performs a process of interchange and EFM modulation of the processing. When EFM modulation circuit 12 data forms the 14 bits of the channel of each byte of audio data D2U during the period, which is 14 times longer than the reference period T, and connects the data is 14 bits channel 3 bits compounds bits of the channel.
On figa shows part of the data EFM modulation. Scheme 12 data produces NRZI modulation sequence data, forming, thus, the data D3 channel (pigv). In the case of the conventional CD-ROM, as shown in figs, the laser beam L is controlled by the switching on/off in accordance with the data D3 of the channel, and with a sequence of slots, with the width of the notches of 0.5 [μm]. As mentioned above, in the present embodiment, the laser beam is deflected by the mirror 8, and each notch is shifted to the right or left from the center of the track.
Through a process corresponding to the processing unit, the audio data D2U high 16 bits, the circuit 12 data adds error correction code to the audio data D2L lower 4 bits, and performs a process of alternation, and then converts them into a sequence of data. In this case, the circuit 12 data adds the error correction code by separating the two sequences chunked parity in the 8-bit modules. That is, in accordance with the processing of audio data D2U bits figure 12 data generates blocks of six data elements (48 bits) by grouping the audio data D2L on 8-bit modules and adds one feature parity value of 4 bits in each block. Next, the circuit 12 data produces the alternation of a single block that includes these six data elements (48 bits) and one sign of parity (8 bits), and then adds the sign parity of 8 bits.
Scheme 12 data processing converts a sequence of bits is generated, as described above, in the sequence data. Scheme 12 the data on the forms data D4 control offset which are obtained by successively comparing each bit of the serial data with a logic level and the logic level of the data D3 of the channel corresponds to the recess, and outputs the data D4. That is, the logical "0" or "1" of each bit of the data received at the data processing lower 4 bits specify the offset to the right or to the left of each recess, as shown in fig.2D.
The control circuit 13 receives the data D3 of the channel, which are received from the circuit 12 to the data processing, as described above, and generates the control signal S3, designed for on/off of the laser beam in accordance with the logical level of the data D3 of the channel. Therefore, the upper 16 bits of the 20 bits constituting the audio data DA is written to the parent disk 2 so that they can correctly be reproduced by the conventional optical disc player, namely a device called the CD player.
The control circuit 7 generates a control signal S4 so that each notch is formed on the disk gets the offset in the direction of right and left from the center of the track in accordance with the data D4 of the control offset. Therefore, as shown in fig.2D, the notch corresponding to data high 16 bits shifted in accordance with the data D4 control offset is formed on the disc like a regular CD is. Data D4 control the offset corresponds to the lower 4 bits. As described above, in the present embodiment of the invention the data D2L, designed to improve the quality, written as logic "0" or "1" by moving the notches from the center of the track.
When the data D4 of the control displacement is recorded by shifting grooves from the center of the track, the signal RFD error tracking track changes in accordance with the data D4 control offset, as will be described below. Therefore, the data D4 of the control displacement can be extracted from the signal RFD error tracking track. In this embodiment of the invention, as shown in fig.2D, the width of the offset is selected to be ±50 [nm], so that the audio data high 16 bits can play back a standard CD player.
In the present embodiment of the invention 20 bits constituting one sample, divided into upper 16 bits and lower 4 bits, and the upper 16 bits are written as excavation and ground, and the lower 4 bits are recorded as an offset grooves. As the recording system are different, as indicated above, it is necessary to maintain synchronization relationship between the two groups of data.
For example, in accordance with the signal format of the CD, because the number of words (number of characters) of the data included the one frame, fixed 4-bit data corresponding 16-bit data included in one frame are written in the same frame. In addition, the described method can be used another way to implement a synchronization relationship. Moreover, the synchronization relationship is not always necessary depending on the type of data recorded by the displacement of the notches, as will be explained below.
The optical disk obtained by writing to the optical disk of figure 1, below, if you need to specify how it differs from the existing CD drive is called drive ExCD. The ExCD disc is identical to the existing CD-ROM in that it has an initial track on the innermost circumference and the end zone most remote from the center of the circle.
Figure 3 shows the block diagram of the optical disc player. Figure 3 position 20 marked the optical disc player in General. Player 20 of the optical disk can reproduce the existing optical disk and disk ExCD. The optical disk 21 type CD-ROM drive ExCD or something similar, the disc rotates at a linear speed by an electric motor 22.
The optical disk 21 is read using the optical head 23 reads. The output signal of the optical pickup 23 reads enters the high-frequency circuit 24. Optical is deft 23 read irradiates a laser beam to the optical disc 21 using the built-in semiconductor laser and receives returning light with the help of specially designed for this purpose, the photosensitive device. High-frequency circuit 24 produces a gain and an arithmetic operation on the output signal of the light-sensitive device, the optical head 23 reads and generates the RF signal playback signal RFD error tracking track and the error signal focus (not shown). Signal-based RFD error tracking track error signal of the focus servo circuit (not shown) generates servo signals intended for the implementation of the tracking path and the focusing lens of the optical pickup 23 reads and delivers these signals to the optical head 23 is read.
The optical head 23 is read and the high-frequency circuit 24 can be performed, for example, as shown in figure 4. Figure 4 is divided into 4 parts, the detector 82 has four photosensitive device from a to D, divided in the direction of the disc and in a direction that perpendicularly intersects the direction of the track. Detector signals SA - SD are calculated using the arithmetic operating circuit RF circuit 24. The RF signal playback is formed by adding the signals from the detector photosensitive devices using circuit 83 of the Constitution, namely, by performing arithmetic operations (SA+SB+SC+SD). An arithmetic operation {(SA+SB)-(SC+SD)} is calculated by adding signal the circuits 84 and 85 and the subtraction signal circuit 86.
Thus, a signal is generated RFD error tracking track. The level of the RF signal playback is changed in accordance with grooves and pads formed on the optical disk 21. In addition, the high-frequency component signal RFD error tracking track changes in accordance with the direction of displacement of the grooves formed on the optical disk 21.
In addition to device detection error tracking track shown in figure 4, can be used in other various structures. For example, you can use the method that called the method with 3 rays, which are used spots of the three beams, the method that is called push-pull method, which uses a detector that is divided into 2 parts, the method that is called heterodyne measurement of the difference between the output signals of the light-sensitive sensors in a diagonal direction of the detector, divided into 4 parts, the cutoff of the high-frequency signal, or a similar method.
The signal RFD error tracking path is fed to the circuit track track (not shown)which ensures that the spot of the readout laser beam on the optical disk 21 passes through the center of the track. Assume that the optical disc 21 is a ExCD disc, in which the recess is offset from the center of the track and the level is ü signal RFD error tracking track changes in accordance with the offset value. The level change of the error signal of the tracking path refers to a component of a high frequency and corresponds to a frequency component, which is a block diagram of a tracking track in the preceding chain tracking practically does not react. The block diagram of the tracking path has the function of correcting deviations from the paths resulting from the manifestation of eccentricity, resulting in the production of the disk, or when a disk is loaded, so this function corrects the errors of the tracking track relatively low-frequency component. Even in the case of ExCD disc instead of the optical disc 21, in this regard, the playback signal offset grooves will not be affected, and the spot of the readout laser beam will pass through the center of the track. In this case, since the amount of displacement of the grooves from the center of the track is limited to ±of 0.05 [μm], the notch offset can be read.
Further explanations will be given when the review of figure 3. The RF signal played back from an RF circuit 24 is supplied to the circuit 26 EFM demodulation (modulation eight to fourteen). The signal RFD error tracking path is supplied to the circuit 30 binary demodulation through the circuit 25 selection and filter 28 of the upper frequencies. The filter 28, the upper frequency is selected to separate the high frequency components, which are what aalami the offset grooves in the signal RFD error tracking track. When using block 27 determine the disk type is determined that the optical disk 21 is ExCD disc, based on the data, which will be described below, scheme 25 choice transmits a signal RFD error tracking path of the high-frequency circuit 24 to the filter 28 of the upper frequencies under the control block 27 determine the disk type.
As described above, in the case of disk ExCD data in THE recorded identification data ID and the identification information of the copy IR, showing that the disk is an original optical disk, which is formed with the parent disk. After loading the optical disc 21 decoder 29 CIRC (cross-alternate reed-Solomon code) performs the processing of the RF signal playback, thus reproducing THE data recorded in the track of the optical disk 21, and outputs them to the system controller (block 27 determine the type of disc). When the unit 27 to determine the type of the disk, respectively, based on the result of detection of the identifying data disk ID determines that the optical disk 21 is ExCD disc, turn on the circuit 25 of the selection.
Scheme 26 EFM demodulation performs EFM demodulation of the RF signal playback, which comes from the RF circuit 24. The decoder 29 CIRC performs decoding data received from circuit 26 EFM demodulation, and performs the process of correcting errors with p is the power of the error correction code, that was added when recording, restoring, thus, audio data D6U, which are output. As described above, even if the optical disk 21 is an existing CD-ROM or disk ExCD, audio data D6U, consisting of 16 bits/sample, extracted from the RF signal playback corresponding to the presence or absence of a notch, like the
the method of signal processing in an existing CD player.
When the circuit 25 selection is enabled in response to the signal from block 27 determine the type of disk, the high frequency signal RFD error tracking path is supplied to the binary circuit 30 demodulation. The binary circuit 30 determines the demodulation level change component of the high frequency signal RFD error tracking track by comparing the input signal with the threshold value thus produced binary data playback regarding data quality improvement.
The decoder 31 of the code with the error correction processing with error correction data playback, which come from the binary circuit 30 demodulation, and produces its reverse rotation, and thus reproduces and outputs 4-bit data D6L quality improvement. When the optical disk 21 is an existing drive, decoder 31 of the code with the bug fix you is the CIO 4-bit data (0000) instead of 4-bit data D6L improve in case when the audio data D6U processed by the function "exclusive OR" in the mixer 35, which will be explained below. In the case of processing audio data D6U function multiplication in the mixer 35, consistently displayed a sequence of 4-bit data of a predetermined specific data random numbers.
The multiplexer (MUX) 33 adds the 4-bit parallel data D6L improve the quality that comes from the decoder 31-correcting code errors in the low-order bits of the 16-bit parallel audio data received from the CIRC decoder 29, and generates a 20-bit parallel audio data DAEx. Therefore, when the optical disk 21 is ExCD disc, the multiplexer 33 generates audio data DAEx high sound quality, namely, data of 20 bits/sample.
On the other hand, the mixer 35 (MIX) adds each bit of data D6L improve the quality coming from the decoder code 31 error correction, to the lower 4 bits of 16-bit parallel audio data D6U that come from the CIRC decoder 29, based on the execution of the function "exclusive OR". Thus, the mixer 35 outputs the sound data DB, which are formed by deterioration of sound quality of audio data from the CIRC decoder 29. In the case of output data in accordance with a random number from the decoder 31 to the and error correction, above, the mixer 35 multiplies the lower 4 bits of the audio data on the data of the random number, thereby generating audio data DB generated by deterioration in sound quality.
Unit 27 to determine the type of the disc is controlled by a system controller (not shown). When the loaded optical disc 21, the system controller searches using the optical head 23 reads, receives information such as the number of music pieces recorded on the optical disk 21, the playback time, etc. from THE data recorded on the first track of the optical disk 21, and displays it using the display. In this case, the system controller also receives the identification information of the disc ID of the optical disk 21, discriminating, therefore, is whether the loaded optical disk 21 existing CD-ROM or disk ExCD by checking the identification data of the disk ID. Unit 27 to determine the type of drive switch circuit 25 and 36 selection on the basis of the definition.
Therefore, when the optical disc 21 is a ExCD disc, turn on the circuit 25 selection and circuit 36 selection selects the output signal of the multiplexer 33. Therefore the audio data DAEx high sound quality coming from the circuit 36 of choice. When the optical disk 21 is an existing compact disc diagram 36 selection of huts is rateline outputs the audio data D6U, coming from the CIRC decoder 29 in scheme 37 digital to analog (d/a) Converter.
Scheme 37 d/a Converter produces a digital to analog conversion of the audio data received from the circuit 36 of choice, and generates an analog audio signal SA. Therefore, as for the sound quality of the playback of the analog signal in the player 20 of the optical disk in the case of an existing CD, processed audio data D6U coming from the CIRC decoder 29, and the data can be replayed with sound quality equal to the sound quality of the CD), the corresponding 16 bits, similar to the existing CD-ROM. In the case of disk ExCD audio data DAEx that come from the multiplexer 33, selectively processed and data can be reproduced with high sound quality (sound quality ExCD), corresponding to 20 bits.
Figure 3 the interface 38 is a chain of I/o for transmitting or receiving various data to/from an external device or similar device. For example, the interface 38 supplies the audio data to a recording device and transmits or receives various data related to the audio data. Block 39 of the separator external device connected via the interface 38. Block 39 of the separator external device recognizes the external device and, thus, ESET, whether the connected external device is a valid device (a device, which permitted the operation of copying or moving data) or not.
Scheme 40 selection is controlled in accordance with the result of the recognition unit 39 of the separator external devices. When the scan is determined that connected a valid device, the digital data recording from the circuit 36 of choice is coming to an external device through the interface 38. When it is determined that the external device is not a valid device, scheme of selection of 40 prints from the mixer 35, the external device digital audio data low sound quality. This method ensures the protection of copyright.
It is also possible to perform the device so that when the block 27 determine the type of the disk determines that the data are not original data, namely that the data is data that is copied from disk ExCD, by checking the identification data copy IR, recorded as a data disk ExCD, the control circuits 25 and 36 of choice, and displays the data size is 16 bits/sample, similar to the existing CD-ROM.
It is also possible to reproduce data recorded with offset notches, and remove them from the optical disk regardless of the data playback.
Pre is striding embodiment, as described in relation to figure 2, the notch moves to the left and right writing direction (track direction) in accordance with a logical "0" and logical "1" of each bit data D4 control offset, respectively. That is, assuming that 16-bit audio data that is recorded by repeating grooves and areas that are designated as the first data, and the data D4 control offset (data of the lower 4-bit) are specified as the second data, each bit of the second data is recorded by shifting each of the notch.
Meaning that the data is recorded by shifting the cut-outs will be more specifically explained below and hereinafter will be described an example that differs from the one described above. Figure 5 shows the data format of an existing CD. In the CD-ROM plots comparability on the parity of Q and R, each of which consists of 4 characters, are formed from the total number of 12 samples (24 characters) digital audio data of two channels. 33 character (264 information bits), which are obtained by adding one character to this sub-code the total number of 32 characters, are treated as a single package. That is 33 characters including sub code data from D1 to D24, symbols comparability even parity from Q1 to Q4 and the characters comparability even parity from P1 to P4 may be included in one frame after the EFM modulation.
When EFM modulation each symbol (8 information the ion bits) is converted into 14 bits of the channel. Bits of connections, number 3 bits placed between the 14 bits of the channel, and 14 bits of the channel. In addition, the frame header is added to the clock, the combination of a frame. If the bits of the channel is denoted as T, which synchronizes the combination of the frame will be installed in the form of combination, which is continuously periods 11T, 11T and 2T. This combination does not occur in accordance with rule EFM modulation that allows you to set the vertical synchronization using a special code.
When EFM modulation duration, during which continuously follow "0" or "1"is defined values that are the product of a whole number by the value T in the range from 3T to 11T. This is done to prevent the situation when the reproduction clock pulses will be difficult, because the "0" or "1" will continuously follow for a long period of time. The present invention is not limited to the use of EFM modulation, but is intended to achieve the same purpose even when other digital modulation type modulation 8-16, which is designed to convert 8 bits in a combination of 16 bit channel. In other words, when the digital modulation data is converted so as to increase the minimum inverting interval data recording/reproduction, to the extent possible, and to reduce the maximum is hydrated intervals invert to the maximum extent possible. Therefore, when the second data is recorded as an offset notch, possible to record the amount of data, on average, is determined in accordance with the system of digital modulation. For example, in the case of EFM modulation, approximately three bits are inserted in the middle two bytes (T, including bits connection) data. In the case of directly writing the second data in the form of a binary value of three bits, therefore, can be recorded on two data bytes.
If you are ternary record, which will be described below, can be written 4, 5 bits.
Since the maximum inverting interval (the maximum length of the notches is 11T, as described above, the case where the position of the read spot reproducing beam deviates from the center of the track, to a certain extent can be prevented. However, depending on the combination of bits of the second data there is a danger that the displacement of the centre of the track will be in the same direction, so that when this occurs the problem that will be displaced tracking tracks during playback. To prevent this problem in one shot deliberately placed the notch located in the center of the track.
In the example depicted in Fig.6, as shown by the shaded areas, recesses, which are located in the header area (si is ironiziruya combination of frame and sub code) of one frame, and in the field, which is located almost in the middle (data Q4 and D13) of one frame, is formed in the center of the track. The situation occurs when the offset of the tracking track playback can be prevented by the use of notches in the center of the track. The notches in the center of the track can be placed only in the header area or in the middle part of one frame. Instead of a set of grooves in the center of the track can also be placed one notch.
Effectively preventing displacement of the tracking tracks can be obtained by modulating second data and write them in this form instead of directly writing. As the modulation system can be used in various systems of the type conversion 8-9, in which 8 bits are converted into 9 bits 8-10, in which 8 bits are converted into 10 bits, etc. by means of modulation can be also prevented the need for accommodation grooves in the center of the track, as indicated above.
On figa and 7B shows an example of conversion 4-5. As shown in figa, "0" or "1" is determined in accordance with the direction of offset notches. In accordance with table conversion rules shown on FIGU, 4-bit information words (character data) is converted into a 5 bit code words (code symbols). In each code word includes 2 bits of the value "0" or "1") and 3 bits with the value "1" (or "0"). The situation in which continuously last four or a greater number of "0" or "1", prevented for each code word.
Further, pursuant to the conversion of 4-5, which is shown in figv, in the boundary part of the code word, the number of "0" or "1" is set to 2 or less, and the number "0" or "1", which is continuously ongoing in the junction between two code words is set to 4 or less. Using the modulation offset recesses second data converted by the rule 4-5 avoiding a situation in which there is an offset of the tracking tracks. In addition, in accordance with the conversion 4-5, shown in figv, is formed by the combination of bits, which is implemented check for odd, if you apply an arithmetic operation "exclusive OR" to 5 bits of the code word which forms the system, having the ability to detect errors.
Further, when considering Fig will be described multivalued recording with zero bias (namely, in which the recess is located in the center of the track) in addition to the offset notches to the right and left direction of the recording (playback). Three bits of the second data is recorded by shifting the two notches (the length of the grooves is not always equal), which are arranged continuously in the direction of recording. If you take that direction is of record drawing set from left to right, then, for example, three bits "010" is written with two grooves, including the notch, with an offset to the right from the center of the track, and the recess having offset to the left.
The two notches located in the center of the track, as shown in the lower part Fig, are used as the special location of the grooves. That is, these two notches correspond to the three bits "000 or 111, and they are respectively used instead of the two cut-outs (both are offset to the right), which usually indicate "000", or two notches (both are offset to the left), which typically refer to "111". When the second data is continuously continue "000" or "111", because in this case the offset of the tracking track uses a special two notches. The consistency of these two special slots "000" or "111" is determined by three bits, which recorded two notches before them and after them. By performing multi-valued recording, as shown in Fig, the amount of information of the second data that can be recorded can be set larger than the amount of information of the first data that have a predetermined amount of information.
Next will be described a second species data that is recorded using the offset grooves. In the above example, the second data corresponds to the lower 4 bits, and the number of bit sampling audio d is the R is extended to 20 bits, what improves the sound quality. Another example of the second data intended to improve the quality of sound is audio data intended for the implementation of the multi-channel. While the existing data CDs usually represent the data of the two channels, multi-channel data is additionally recorded as the second data. For example, data can be written low-frequency component of the middle channel and data of the right and left rear channels. In this case, since the amount of information that can be recorded as the second data, a little, the sound data can also be recorded after they are subjected to the compression process (MP3 (MPEG1 audio layer 3), ATRAC (acoustic coding adaptive streaming), and so on). Depending on the compression process audio data, the first data can be recorded as the second data and second data that is reproducible regardless of the playback device, may also be recorded on another recording medium data, for example on a storage device such as a map.
Data in the form of symbols associated with the first data can be recorded as the second data. For example, can be written headlines music software, recording actions of the singer, words, etc. Can be also recorded information about the company the Institute of sound and URL (uniform resource locator (standardized character string specifies the location of the document on the Internet), such as the address of the home page of the singer, etc. Data is a still image, such as photo album cover, a photo of the artist or similar images can also be written as the second data. The amount of image data is also desirable to reduce using compression process. Data karaoke (namely, to the accompaniment of music programs recorded as the first data) can also be written as the second data.
In addition, the data for conversion and/or control the first data can also be written as the second data. For example, can also be recorded data pertaining to copyright law designed to protect copyright in respect of the first data. That is, when for copyright protection of sound data has been encrypted and recorded as the first data, the key data intended for decoding the encrypted data, can be written as the second data. Information copy control, which is called SCMS (serial control copying) can also be written as the second data. SCMS is information relating to the prohibition/permission of the copy operation, the generation of copies, etc.
In addition, as a technology, is prednaznachennoi to prevent illegal copying of digital works, copyrighted (image, music, and more), was proposed digital watermark. This technique is a method of embedding identification information (identification number of the copyright owner, the identification number of the record companies, the identification number of the user's music software and so on), information for copy control, the key used for decoding the encrypted information
and so, as the information of the watermark in digital works protected by copyright. Embedded identification information, information used for copy control, key, etc. will not be lost, even if you process a data compression type or similar. Therefore, there may be recognition of illegal copies may be made to the operation of the copy control can be implemented decoding the encrypted data, etc. using the information that is embedded as the watermark information.
The second data in the above-described invention can be used as the key information that is intended for detection or control of the embedded identification information, or similar data. That is the key data point to the position in which is was embedded identification information, or similar data the method of its implementation, etc. the data key may also be encrypted and protected. Some of the information of the watermark can also be formed by the second data.
The above-described variant of implementation refers to the case of applying the present invention to the optical disc and the music data recorded on it. However, the present invention can also be applied to the optical disk, which is not a CD. For example, the present invention can also be applied to CD-ROM, DVD (digital versatile disc or digital video disc). In the case of DVD instead of the EFM modulation using the modulation 8-16. The present invention is not limited to the optical disk, it can also be applied to the optical map. In addition, the present invention is not limited to music data, it can also be used for copyright protection of software games, navigation software, computer software, or similar, on a CD-ROM, etc.
In accordance with the present invention, the first data can be recorded with grooves and pads, and the second data may also be recorded with offset grooves. Therefore, the quality of music data recorded as the first data can be improved using the second the data. The second data may also be used for copyright protection in respect of the first data. If this does not occur a situation when the amount of information of the first data that can be recorded on the same media, decreases when writing the second data. In addition, since the amount of displacement of the grooves is set within a predetermined value range, which is not the offset of the tracking tracks, the first data can be reproduced with existing players, so ensure compatibility playback.
1. Optical recording medium having tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the grooves, wherein a set of grooves is offset from the center of the track based on the second data, and the grooves intersect the Central position of the track at a predetermined interval.
2. The carrier according to claim 1, wherein a set of grooves is displaced in the direction which perpendicularly crosses the centre of the track.
3. The carrier according to claim 2, wherein a set of grooves is at least in one of the positions is in a Central position on the specified center of the track, in the first position, is shifted on the basis of the second data in the direction which perpendicularly crosses the center of the track, and in the second position, displaced from the second data so that the center of the track situated between the first specified position.
4. The carrier according to claim 3, wherein a set of grooves is located in a Central position on the basis of pre-defined block write.
5. Media of claim 1, wherein the first data are the main data that are recorded on the optical recording medium, and the second data are additional data to the main data.
6. The carrier according to claim 5, in which the additional data is data including at least data management copyright.
7. The carrier according to claim 5, in which the first data are the main data that are recorded on the optical recording medium, and second information represents the lower bits of the main data.
8. The carrier according to claim 1, in which in relation to the first data, performed the encryption process and the second data is a data key that is intended for decoding the encryption process performed with respect to the first data.
9. A recording device for optical recording media, comprising a light source for output of the recording laser beam; a light modulator that is designed to modulate the specified beam, the recording laser is, coming from the light source, based on the supplied first data; a light deflector that is designed to reject the modulated recording laser beam coming from the light modulator, based on the supplied second data in the direction which almost perpendicularly intersects the direction of scanning the modulated recording laser beam of the optical recording medium; a lens designed to focus the modulated recording laser beam coming from the light deflector onto the optical recording medium, with the notches intersect the Central position of the track at a predetermined interval.
10. The device according to claim 9, characterized in that it includes a signal processing unit, used for forming the first data and second data based on the supplied data.
11. The device according to claim 10, characterized in that it includes a first control unit that provides the first data from the signal processing unit and which controls the light modulator, and a second control unit that provides the second data from the signal processing unit and which controls the light deflector.
12. The device according to claim 10, in which the signal processing unit generates the first data based on the main data that are recorded on the optical recording medium, and forms in which that data based on the additional data, master data, recorded on optical recording media.
13. The device according to claim 10, in which the signal processing unit generates the first data on the basis of high-order bits of the main data recorded on the optical recording medium, and generates second data based on the low-order bits of the main data.
14. The playback device for an optical recording medium having tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the slots, comprising: an optical read head, designed for reading the first data and second data from optical recording media, on which a lot of fill was applied offset from the center of the track based on the second data; a first demodulate unit designed for demodulating the first data on the optical recording medium based on the output signal of the optical head reading; second demodulate unit designed for demodulation of the second data the optical recording medium based on the output signal of the optical head reading, with grooves intersect the Central position of the track at a predetermined interval.
15. The device according to 14, further comprising a signal processing unit that is designed to signal the play is to be placed and the error signal of the tracking track on the basis of the output signal of the optical head reading and wherein said playback signal from the signal processing unit is supplied to the first demodulate block, and the error signal of the tracking path of the signal processing unit is supplied to the second demodulate block.
16. The device according to item 15, in which the second demodulate unit includes a filter unit that is designed to highlight the high frequency component of the error signal of the tracking path, which is supplied from the signal processing unit, and the block demodulation processing intended for demodulation of the output signal from this filter.
17. The device according to 14, in which the optical read head includes a photodetector having a first light detection unit and the second light detection unit, which are formed by dividing at least two blocks in the direction of the track of the optical recording medium, and the device further includes a signal processing unit, for performing arithmetic operations on the output signals from the first light detection unit and the second light detection unit, and the total signal, which represents the sum of the output signals of the first light detection unit and the second light detection unit, served on the first demodulate block from the signal processing unit, and the differential signal is, which represents the difference of the output signals of the first light detection unit and the second light detection unit, is supplied to the second demodulate block from the signal processing unit.
18. The device according to 17, in which the second demodulate unit includes a filter unit that is used to select the component of the high frequency differential signal, which is supplied from the signal processing unit, and the block demodulation processing intended for demodulation of the output signal of the filter unit.
19. The device according to 14, characterized in that it includes a synthesizing unit that is designed for synthesizing the output signal of the first demodulateur unit and the output signal of the second demodulateur block.
20. The device according to 14, characterized in that it includes a block divider external devices, designed to determine whether or not an external device connected to the specified device, valid external device, in which, when the block separator external devices is determined that the external device connected to the specified device, are valid external device, receive at least the output signal of the second demodulateur block.
21. The playback device for an optical recording medium having tracks, each track and which are composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the grooves, which includes an optical read head, designed for reading the first data and second data from optical recording media, on which a lot of fill was applied offset from the center of the track based on the second data; a first demodulate unit designed for demodulating the first data on the optical recording medium based on the output signal of the optical head reading; second demodulate unit designed for demodulation of the second data on the optical recording medium based on the output signal of the optical read head; a control unit designed to control the operation of the second demodulateur unit based on the identification data read from the optical recording medium by the optical head reading, with grooves intersect the Central position of the track at a predetermined interval.
22. The device according to item 21, in which the identifying data recorded on the optical recording media is data indicating whether there were or not the second data recorded on the optical recording medium, and the control unit includes a second demodulate unit, when the identification data indicates that the second data has been recorded is and optical recording media.
23. The device according to item 22, further comprising a signal processing unit, intended for the formation of the playback signal and the error signal of the tracking track on the basis of the output signal of the optical head reading, and in which the playback signal from the signal processing unit is supplied to the first demodulate block and the error signal of the tracking path of the signal processing unit is supplied to the second demodulate block.
24. The device according to item 23, wherein said control unit includes a switching unit, located between the signal processing unit and the second demodulation block and the block type definition of the disk to the switching operation of switching unit on the basis of these identification
data, and when the identifying information indicates that the second data has been recorded on the optical recording medium, the controller can determine the type of drive controls the switching operation of switching unit to connect the signal error tracking track to the second demodulateur block.
25. The device according to paragraph 24, in which the second demodulate unit includes a filter unit that is designed to highlight the high frequency component of the error signal of the tracking path, which is supplied from a signal processing unit, and the unit demodula the ion processing, designed for demodulation of the output signal of the filter unit.
26. The device according to item 21, characterized in that it includes a synthesizing unit that is designed for synthesizing the output signal of the first demodulateur unit and the output signal of the second demodulateur block.
27. The device according to paragraph 24, in which the control unit further comprises another switching unit that switches the block type definition of the disk, and selects either the output signal of the synthesizing unit or the output signal of the second demodulateur block.
28. The device according to item 22, in which the optical read head includes a photodetector having a first light detection unit and the second light detection unit, which are formed by dividing at least two of the block in the direction of the track of the optical recording medium, and the device further includes a signal processing unit, for performing arithmetic operations on the output signals from the first light detection unit and the second light detection unit, and the total signal, which represents the sum of the output signals of the first light detection unit and the second light detection unit, served on the first demodulate block from the signal processing unit and the difference signal, which depict the defaults to a difference of the output signals of the first light detection unit and the second light detection unit, served on the second demodulate block from the signal processing unit.
29. The device according to p, in which the second demodulate unit includes a filter unit that is used to select the component of the high frequency differential signal, which is supplied from the signal processing unit, and the block demodulation processing intended for demodulation of the output signal from the filter unit.
30. The device according to item 21, wherein the unit includes determining the type of external device, designed to determine whether the external device connected to the specified device has a valid external device or not, and in which, when the block type definition of the external device determines that the external device connected to the specified device, is a valid external device, at least from the second demodulateur unit displays the output.
31. Optical recording medium including a data recording area having a spiral track, composed of multiple grooves, which are formed on the basis of the first data, which must be subjected to a predetermined modulation and recorded, and the areas between the slots; the data area management, in which the recorded management data of the first data recorded in the recording area of the data, in what oterom many grooves is offset from the center of the track based on the second data, while the notches intersect the Central position of the track at a predetermined interval.
32. Media in p, in which many notches are displaced in the direction which perpendicularly crosses the centre of the track.
33. Media in p, in which many slots hosted, at least in one of the positions is in a Central position on the specified center of the track, in the first position, is shifted on the basis of the second data in the direction which perpendicularly crosses the centre of the track, and in the second position, displaced from the second data so that the center of the track situated between the first position.
34. Media in p, in which with respect to the first data executed modulation type 8-14.
35. Media in clause 34, wherein a set of grooves is located in a Central position in each of at least one frame.
36. Media in p, in which the first data are digital data that is recorded on the optical recording medium, and the second data are additional data digital data.
37. Media in p, in which the additional data is data including at least data management copyright.
38. Media in p, in which the first data represent the high-order bits of digital data, which record the Ana on the optical recording medium, and the second data are bits of digital data.
39. Media in p, in which management data is recorded identifying information showing were or not the second data recorded on the optical recording medium.
40. Media in p, wherein a set of grooves is offset from the center of the track on ±0.05 microns.
41. Media in p, which was executed encrypt with respect to the first data and the second data is a data key that is intended for decryption process performed with respect to the first data.
42. The recording method for optical recording media, comprising the steps of: modulating the recording laser beam emerging from the light source, based on the received first data; deviation of the modulated recording laser beam based on the received second data in the direction which almost perpendicularly intersects the direction of scanning the modulated recording laser beam of the optical recording medium; a focusing lens modulated and rejected the recording laser beam on an optical recording medium, with the notches intersect the Central position of the track at a predetermined interval.
43. The method according to § 42, in which the first data are generated from the basic data, which zapisi who are on the optical recording medium, and the second data is generated based on the additional data of the main data recorded on the optical recording medium.
44. The method according to § 42, in which the first data formed on the basis of high-order bits of the main data recorded on the optical recording medium, and the second data is generated based on low-order bits of the main data recorded on the optical recording medium.
45. How to play the optical recording medium having tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data, which are intended to record, and areas between the grooves, which includes the following steps: reading the first data and second data from optical recording media, on which many of the grooves is offset from the center of the track based on the second data; demodulating the first data based on the data read from the optical recording medium; and demodulating the second data based on the data read from the optical recording medium, with the notches intersect the Central position of the track at specified intervals.
46. The method according to item 45, further comprising the steps of forming the playback signal and the error signal of the tracking track on the basis of the data read from the optical recording medium; demodulating the first data formed on the basis of the signal playback; demodulation of the second data based on the error signal of the tracking path.
47. The method according to item 45, in which the second data demodulated on the basis of the high frequency component of the generated error signal of the tracking path.
48. The method according to item 45, which uses optical read head, comprising a photodetector having a first light detection unit and the second light detection unit, which are formed by dividing at least two blocks in the direction of the track of the optical recording medium, the first data demodulated on the basis of the total signal, which represents the sum of the output signals of the first light detection unit and the second light detection unit and the second data demodulated on the basis of the difference signal, which represents the difference of the output signals of the first light detection unit and the second light detection unit.
49. The method according to p, in which the second data demodulators-based component of the high frequency differential signal.
50. The method according to item 45, further comprising the step of outputting at least the second demodulated data, when it is determined that the connected external device is a valid external device.
51. How to play intended for optical nositelyami, which has tracks, each of which is composed of multiple grooves, which are formed on the basis of the first data designed to capture, and areas between the grooves, and wherein a set of grooves is offset from the center of the track based on the second data, and which were recorded identifying information, containing the following steps: first demodulation data based on the data read from the optical recording medium, and demodulation of the second data based on the data read from the optical recording medium in accordance with a result of identification of the identification data read from the optical recording medium, with the notches intersect the Central position track at a predetermined interval.
52. The method according to § 51, where, when identifying the data recorded on the optical recording medium, show that the second data has been recorded on the optical recording medium, the second data demodulators based on the data read from the specified optical recording media.
53. The method according to § 51, characterized in that it comprises the following steps: formation of the playback signal and the error signal of the tracking track on the basis of the data read from the optical recording medium; demodulating the first data based on a playback signal; demodulating the second data on the basis of SFOR the new error signal of the tracking path.
54. The method according to § 51, characterized in that it includes the step of synthesizing the demodulated first data and the second demodulated data, and output the result of the synthesis.
55. The method according to § 51, characterized in that it includes the step of outputting at least the second demodulated data, when it is determined that the connected external device is a valid external device.
56. The method according to § 51, which uses optical read head, comprising a photodetector having a first light detection unit and the second light detection unit, which are formed by dividing at least two of the block in the direction of the track of the optical recording medium, the first data demodulated on the basis of the total signal, which represents the sum of the output signals of the first light detection unit and the second light detection unit and the second data demodulated on the basis of the difference signal, which represents the difference of the output signals of the first light detection unit and the second light detection unit.
57. The method according to p, in which the second data demodulators-based component of the high frequency differential signal.