JP4077005B2 - Information recording medium, recording apparatus and reproducing apparatus therefor - Google Patents

Description

  The present application relates to an information recording medium such as a high-density optical disk capable of recording information such as video and audio represented by DVD at a high density, a recording apparatus for recording information on the information recording medium, and the information recording medium Belongs to the technical field of a playback device for playing back information.

  Conventionally, so-called LDs (Laser Disks), CDs (Compact Disks), etc. are widely used as optical disks on which information such as video and audio is recorded.

  In these LDs and the like, video information and audio information are recorded together with time information indicating the time at which each information should be reproduced with reference to the reproduction start position of each LD or the like. For this reason, in addition to general normal playback in which recorded information is played back in the order in which they are recorded, for example, in a CD, only a desired song is extracted from a plurality of recorded songs. Or playback such as changing the playback order at random.

  However, in the LD or the like, it is said that viewers have choices with respect to displayed video and reproduced sound, and that the viewer cannot select and reproduce so-called interactive changes such as selecting and viewing them. There was a problem.

  That is, for example, when watching a foreign movie recorded on LD, select the language used in the subtitles displayed on the screen (for example, select Japanese subtitles and original subtitles) ) When displaying or listening to music recorded on a CD, the sound of the music may be selected (for example, selecting whether to listen in English or Japanese lyrics) It is not possible.

  On the other hand, there are many proposals and developments on DVD, which is an optical disk whose storage capacity is increased by about 10 times without changing the size of the conventional optical disk. Thus, if voices and the like are recorded in the plurality of subtitles and a plurality of languages, the viewer can enjoy the reproduction rich in interactive change by selecting it.

  However, when recording a plurality of types of voices or various types of music on the DVD, the number of bits is increased when recording the digitized data and recording high-quality sound or the like. However, at this time, if the decoder in the conventional playback device is diverted and an attempt is made to configure the playback device at a low cost, the decoder has a processing capability corresponding to the number of bits of audio or the like recorded on the DVD. It is conceivable that it does not have

  In this case, if the audio or the like is not recorded in an appropriate recording mode, the audio information to be reproduced may not be reproduced during reproduction in an inexpensive reproduction apparatus using the conventional decoder. There is a point.

  Therefore, the present invention has been made in view of this problem, and its problem is to reproduce audio recorded on the DVD in an inexpensive reproduction apparatus having a decoder having the same function as a conventional decoder. When recording, audio and the like that can be easily reproduced can be recorded, and also audio and the like that can be easily reproduced can be recorded even in a reproduction apparatus equipped with a high-performance decoder dedicated to the DVD. It is another object of the present invention to provide a recording device and an information recording medium on which the sound and the like are recorded, and a reproducing device that can reproduce the sound and the like.

In order to solve the above problems, the invention according to claim 1 quantizes recording information to be recorded consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits. Quantizing means for outputting quantized recording information, and the quantized recording information for each of the channels, upper bit quantized recording information of upper 8 × m (m <n and m is a natural number) bits Dividing means for dividing the lower bit quantized recording information, which is the quantized recording information other than the upper bit quantized recording information, and the divided upper bit quantized recording information and the lower bit quantized recording information A higher-order bit quantization recording information block including a plurality of higher-order bit quantization recording information corresponding to successive quantization timings for each of the channels, the higher-order quantization recording information The upper bit quantized recording information block used for the reproduction processing of the recording information using only the block, and the lower bits including a plurality of the lower bit quantized recording information corresponding to the continuous quantization timing for each channel configure, and a lower bit quantized record information block to be subjected to the reproduction processing of the recording information by using the lower quantization record information block and the upper quantized record information block a quantized record information block, wherein Configuration means for configuring a recording information block by adjoining an upper bit quantized recording information block and a lower bit quantized recording information block, and configuring a recording information unit including a plurality of continuous recording information blocks, and an information recording medium A recording position of the upper bit quantized recording information and a recording position of the lower bit quantized recording information, or Additional information generating means for generating additional information for calculating only one of the recording positions of the upper bit quantized recording information, the configured recording information unit, and the generated additional information. Multiplex recording information generating means for multiplexing and generating multiplex recording information; and recording means for recording the multiplex recording information on the information recording medium.

In order to solve the above problem, the invention according to claim 7 quantizes recording information to be recorded consisting of a plurality of channels constituting one stream by 8 × n (n is a natural number of 2 or more) bits. A quantization step of outputting quantized recording information, and the quantized recording information is converted into upper 8 × m (m <n and m is a natural number) bits upper bit quantized recording information for each channel. And a dividing step of dividing the low-order bit quantized recording information that is the quantized recording information other than the high-order bit quantized recording information, and the divided high-order bit quantized recording information and the low-order bit quantized recording information A higher-order bit quantization recording information block including a plurality of higher-order bit quantization recording information corresponding to successive quantization timings for each of the channels, the higher-order quantization recording information The upper bit quantized recording information block used for the reproduction processing of the recording information using only the block, and the lower bits including a plurality of the lower bit quantized recording information corresponding to the continuous quantization timing for each channel configure, and a lower bit quantized record information block to be subjected to the reproduction processing of the recording information by using the lower quantization record information block and the upper quantized record information block a quantized record information block, wherein An information recording medium comprising: a recording information block comprising an upper bit quantized recording information block and a lower bit quantized recording information block adjacent to each other; and a recording information unit including a plurality of continuous recording information blocks. A recording position of the upper bit quantized recording information and a recording position of the lower bit quantized recording information, or An additional information generating step for generating additional information for calculating only one of the recording positions of the upper bit quantized recording information, the configured recording information unit, and the generated additional information. A multiplex recording information generating step of multiplexing and generating multiplex recording information; and a recording step of recording the multiplex recording information on the information recording medium.

In order to solve the above-mentioned problem, the invention according to claim 13 is characterized in that the recording information consisting of a plurality of channels constituting one stream is 8 × n (n is a natural number of 2 or more) bits for each channel. The quantized quantized recording information includes upper bit quantized recording information that is the quantized recording information of upper 8 × m (m <n and m is a natural number) bits for each channel, and the upper bit Divided into lower-bit quantized recording information that is the quantized recording information other than the bit-quantized recording information, and a plurality of higher-order bit quantized recording information corresponding to successive quantization timings are allocated to each channel. A high-order bit quantized recording information block including a high-order bit quantized recording information block that is used for reproducing the recording information using only the high-order quantized recording information block A lower bit quantization recording information block including a plurality of the lower bit quantization recording information corresponding to the quantization timing for each channel, the lower quantization recording information block and the upper quantization recording information block being used. wherein the lower bit quantized record information block to be subjected to the reproduction process of the record information, is configured, the recording information to be adjacent to said lower bit quantized record information block and the upper bit quantized record information block had A block is configured, and a recording information unit is configured by a plurality of continuous recording information blocks, and the recording position of the upper bit quantized recording information and the recording of the lower bit quantized recording information on the information recording medium Addition to calculate either the position or only the recording position of the upper bit quantized recording information Comprising a multi-address, the recording information unit that is the configuration, but the information recording area which is recorded in multiplexed structure.

In order to solve the above problems, the invention according to claim 17 is characterized in that recording information consisting of a plurality of channels constituting one stream is recorded in 8 × n (n is a natural number of 2 or more) bits for each channel. The quantized quantized recording information includes upper bit quantized recording information that is the quantized recording information of upper 8 × m (m <n and m is a natural number) bits for each channel, and the upper bit It is divided into lower bit quantized recording information that is the quantized recording information other than bit quantized recording information, and includes a plurality of upper bit quantized recording information corresponding to successive quantization timings for each channel An upper bit quantized recording information block which is used for the reproduction processing of the recording information using only the upper quantized recording information block , A lower bit quantization recording information block including a plurality of lower bit quantization recording information corresponding to successive quantization timings for each channel, the lower quantization recording information block and the upper quantization recording information block A lower-bit quantized recording information block used for reproducing the used recording information, and the upper-bit quantized recording information block and the lower-bit quantized recording information block are adjacent to each other. The recording information unit is configured by a plurality of continuous recording information blocks, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium Or additional information for calculating only the recording position of the higher-order bit quantized recording information. And the configured recording information unit are reproduced from the information recording medium in which the recording information unit is multiplexed, and the multiplexed recording information for each channel from the information recording medium Detecting and demodulating means for detecting and demodulating and outputting as a demodulated signal, recording information block extracting means for extracting only the upper bit quantized recording information block from the demodulated signal, and the extracted upper bit quantized recording Reproduction processing means for reproducing the higher-order bit quantized recording information included in the information block and outputting the recorded information.

To solve the problems above SL, the invention according to claim 18, 8 × n (n is a natural number of 2 or more) the record information comprising a plurality of channels for each said respective channels constituting one stream bits The quantized recording information quantized in step (b) is the upper bit quantized recording information that is the quantized recording information of upper 8 × m (m <n and m is a natural number) bits for each channel. Divided into lower bit quantized recording information that is the quantized recording information other than the upper bit quantized recording information, and a plurality of the upper bit quantized recording information corresponding to successive quantization timings A high-order bit quantized recording information block including a high-order bit quantized recording information block that is used for reproducing the recording information using only the high-order quantized recording information block , A lower bit quantization recording information block including a plurality of lower bit quantization recording information corresponding to successive quantization timings for each channel, the lower quantization recording information block and the upper quantization recording information block A lower-bit quantized recording information block used for reproducing the used recording information, and the upper-bit quantized recording information block and the lower-bit quantized recording information block are adjacent to each other. The recording information unit is configured by a plurality of continuous recording information blocks, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium Or additional information for calculating only the recording position of the higher-order bit quantized recording information. And a recording apparatus that reproduces the recorded information from an information recording medium in which the configured recording information unit is multiplexed and recorded the multiplexed recording information for each channel from the information recording medium. Detection and demodulation means for detecting, demodulating and outputting as a demodulated signal, recording information block extracting means for extracting the upper bit quantized recording information block and the lower bit quantized recording information block from the demodulated signal, and the extraction Quantized recording information for extracting the upper bit quantized recording information and the lower bit quantized recording information corresponding to the upper bit quantized recording information from the upper bit quantized recording information block and the lower bit quantized recording information block The extracting means combines the extracted upper bit quantized recording information and the lower bit quantized recording information and Processing to and a reproduction processing means for outputting the record information.

In order to solve the above-mentioned problems, the invention described in claim 22 is characterized in that recording information consisting of a plurality of channels constituting one stream is 8 × n (n is a natural number of 2 or more) bits for each channel. The quantized quantized recording information includes upper bit quantized recording information that is the quantized recording information of upper 8 × m (m <n and m is a natural number) bits for each channel, and the upper bit It is divided into lower bit quantized recording information that is the quantized recording information other than bit quantized recording information, and includes a plurality of upper bit quantized recording information corresponding to successive quantization timings for each channel An upper bit quantized recording information block which is used for the reproduction processing of the recording information using only the upper quantized recording information block , A lower bit quantization recording information block including a plurality of lower bit quantization recording information corresponding to successive quantization timings for each channel, the lower quantization recording information block and the upper quantization recording information block A lower-bit quantized recording information block used for reproducing the used recording information, and the upper-bit quantized recording information block and the lower-bit quantized recording information block are adjacent to each other. The recording information unit is configured by a plurality of continuous recording information blocks, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium Or additional information for calculating only the recording position of the higher-order bit quantized recording information. And a recording information unit configured to reproduce the recorded information from an information recording medium on which the multiplexed recording information is recorded, wherein the multiplexed recording information is recorded for each channel from the information recording medium. A detecting and demodulating step for detecting, demodulating and outputting as a demodulated signal, a recording information block extracting step for extracting only the upper bit quantized recording information block from the demodulated signal, and the extracted upper bit quantized recording information A reproduction processing step of reproducing the higher-order bit quantized recording information included in the block and outputting the recording information.

In order to solve the above-mentioned problems, the invention described in claim 23 is characterized in that the recording information consisting of a plurality of channels constituting one stream is 8 × n (n is a natural number of 2 or more) bits for each channel. The quantized quantized recording information includes upper bit quantized recording information that is the quantized recording information of upper 8 × m (m <n and m is a natural number) bits for each channel, and the upper bit It is divided into lower bit quantized recording information that is the quantized recording information other than bit quantized recording information, and includes a plurality of upper bit quantized recording information corresponding to successive quantization timings for each channel An upper bit quantized recording information block which is used for the reproduction processing of the recording information using only the upper quantized recording information block , A lower bit quantization recording information block including a plurality of lower bit quantization recording information corresponding to successive quantization timings for each channel, the lower quantization recording information block and the upper quantization recording information block A lower bit quantized recording information block used for the reproduction processing of the recording information used, and the upper bit quantized recording information block and the lower bit quantized recording information block are adjacent to each other to form a recording information block. A recording information unit is configured by a plurality of continuous recording information blocks, and a recording position of the upper bit quantized recording information and a recording position of the lower bit quantized recording information on the information recording medium, Or additional information for calculating only one of the recording positions of the upper bit quantized recording information and A reproducing method for reproducing the recorded information from an information recording medium in which the configured recording information unit is multiplexed and detecting the multiplexed recorded information for each of the channels from the information recording medium. A detection demodulation step of demodulating and outputting as a demodulated signal, a recording information block extracting step of extracting the upper bit quantized recording information block and the lower bit quantized recording information block from the demodulated signal, and the extracted Quantized record information extracting step for extracting the upper bit quantized record information and the lower bit quantized record information corresponding to the upper bit quantized record information from the upper bit quantized record information block and the lower bit quantized record information block And combining the extracted upper bit quantized record information and lower bit quantized record information together with a reproduction process. And a reproduction processing step of outputting the record information to.

  Next, an embodiment suitable for the present application will be described. Note that the embodiment described below describes an embodiment in which the present invention is applied to the DVD.

  In the following embodiments, an example of each constituent element in the scope of the claims shown on the left side of the following list is composed of elements shown on the right side of the following list.

Upper bit quantized recording information ………… ： Upper bit data Lower bit quantized recording information ………… ： Lower bit data Upper bit quantized recording information block: Upper bit data block Lower bit quantized recording information block: Lower bit Data Block (I) Information Recording Medium Embodiment First, the physical and logical configuration and operation of a DVD, which is one embodiment of an information recording medium corresponding to the present application, will be described with reference to FIGS. I will explain.

  First, a recording format (physical recording format) on a DVD of video information and audio information (including music information; hereinafter the same) will be described with reference to FIG.

  As shown in FIG. 1, the DVD 1 according to the embodiment has a lead-in area LI at its innermost peripheral part and a lead-out area LO at its outermost peripheral part. Are divided into a plurality of VTSs (Video Title Set) 3 (VTS # 1 to VTS # n) each having an ID (identification) number. Here, the VTS is a related title (the number of audio information and sub-picture information included therein, the attributes such as the specification, the corresponding language, etc. are the same) titles (movies etc.) that the producer intends to present to the viewer. More specifically, for example, a plurality of movies having dialogues in different languages are recorded as titles for the same movie, or Even in the same movie, the movie version and the special version are recorded as different titles. In addition, the video manager 2 is recorded at the head of the area where the VTS 3 is recorded. The information recorded as the video manager 2 is, for example, a video recorded on the DVD 1 such as a menu indicating the name of each title, information for preventing illegal copying, or an access table for accessing each title. Information related to the entire information and audio information is recorded.

  Next, one VTS 3 is divided and recorded into a plurality of VOBs 10 each having an ID number, starting with the control data 11. Here, a portion constituted by a plurality of VOBs 10 is referred to as a VOB set (VOBS). This VOB set is a VOB set for the entity part in order to distinguish between control data 11 which is other data constituting the VTS 3 and a plurality of VOB 10 parts which are entities of video information and audio information. .

  The control data 11 recorded at the head of the VTS 3 includes information such as PGCI (Program Chain Information), which is various information related to the program chain, which is a logical division combining a plurality of cells (cells will be described later). Is recorded. In addition to the control information, each VOB 10 is recorded with video information and audio information entity portions (video or audio itself other than the control information).

  Furthermore, one VOB 10 includes a plurality of cells 20 each having an ID number. Here, one VOB 10 is configured to be completed by a plurality of cells 20, and one cell 20 does not straddle two VOBs 10.

  Next, one cell 20 includes a plurality of VOB units (VOBU) 30 each having an ID number. Here, the VOB unit 30 is one information unit constituted by any one of video information, audio information, sub-video information (subtitle information such as subtitles in a movie) or only a navigation pack described later. is there.

  The one VOB unit 30 includes a navigation pack 41 in which control information for controlling video information and the like included in the VOB unit 30 is stored, video data 42 as video information, and audio information. It consists of audio data 43 and sub-picture data 44 as sub-picture information. Here, video data is recorded as the video data 42, and audio data is recorded as the audio data 43. Further, as the sub-picture data 44, graphic data such as characters and figures as a sub-picture is recorded. The standard stipulates that there are 8 types of audio that can be recorded on the DVD 1 and 32 types of sub-video that can be recorded.

  The playback time corresponding to one VOB unit 30 (playback time corresponding to data recorded between one navigation pack 41 and the navigation pack 41 adjacent to the one navigation pack 41) is 0. Recorded to have a length of 4 seconds or more.

  Further, in one VOB unit 30, the navigation pack 41 is always present at the head thereof, but the video data 42, the audio data 43, and the sub-picture data 44 are not necessarily present in the VOB unit 30, and Even if they exist, their number and order can be arbitrarily set.

  Here, each division of the video data 42, the audio data 43, and the sub-picture data 44 shown in FIG. That is, in one VOB unit 30, video data 42, audio data 43, and sub-picture data 44 are divided and recorded in packs P, and the pack P in which the video data 42 is recorded is recorded as video. The pack P in which the audio data 43 is recorded is called an audio pack, and the pack P in which the sub-picture data 44 is recorded is called a sub-picture pack. These packs P are set based on the later-described MPEG2 system used in the DVD 1 of the present embodiment. Further, the pack header recorded at the head of each pack P has a playback time axis on which data contained in each pack P should be read from a track buffer in a playback apparatus to be described later and input to each buffer should be started. Read start time information called SCR (System Clock Reference) indicating the above read start time is recorded. For each pack P, usually, video data 42, audio data 43 or sub-picture data 44 is recorded for each packet which is a recording unit obtained by further subdividing the pack P. In general, one pack P is composed of one packet. That is, with respect to the audio data 43, the audio data 43 is recorded for each audio packet obtained by further subdividing the audio pack, and one audio pack is composed of one audio packet.

  Finally, the navigation pack 41 uses search information (specifically, an address on the DVD 1 in which the video or audio to be reproduced / displayed is recorded) for searching for the video or audio or the like to be reproduced / displayed. It consists of certain DSI (Data Search Information) data 51 and PCI (Presentation Control Information) data 50 which is information relating to playback display control when video or audio searched based on the DSI data 51 is played back. At this time, the DSI data 51 and the PCI data 50 are recorded as a DSI packet and a PCI packet as the packet PT, respectively.

  Further, all the video data 42 included in one VOB unit 30 is composed of one or a plurality of GOPs (Group Of Pictures).

  Note that the PCI data 50 includes highlight information defining display control and operation when an item is selected for a selection item selected by the viewer. With this highlight information, for example, in the image (the so-called menu screen) displaying the item to be selected by the viewer, the screen display change with respect to the item selection, the display position to be changed corresponding to the selection, and the selected A command for the item (an instruction indicating an operation to be executed for the selected item) is set.

  Further, image information for displaying a frame, a selection button, and the like necessary for configuring and displaying the menu screen is recorded as the sub-picture data 44 which is the sub-picture information.

  In addition, the highlight information can include information for setting a value of a register (memory) in the system controller in the playback apparatus described later. This will be described using, for example, the case where the recorded information recorded on the DVD 1 is educational software. In the educational software, a test question is displayed on the display unit, and then a plurality of answer candidates are displayed. In some cases, the sub-picture data 44 is used as a selection item to be selected by the viewer. At this time, the highlight information includes command information corresponding to each selection item. When the selection item corresponding to the correct answer of the problem is selected by the viewer, the system controller responds to the selection item. Based on the command information in the highlight information to be added, a predetermined score corresponding to the correct answer is added to a predetermined register included in the system controller, and the score is not added when an incorrect answer selection item is selected. To. Similarly, questions and answers are repeated for a predetermined number of questions, and after all the answers have been completed, the system controller refers to the predetermined register in which the score has been accumulated by other command information (for example, command information in PGCI). If the score is larger than a predetermined value, the pickup is jumped to the recording position on the DVD 1 where the problem of the next learning stage is recorded, and if the score is smaller than the predetermined value, the review is made. The pickup is jumped to the recording position where the software is recorded. As in the above example, the registers in the system controller can be set by highlight information.

  On the other hand, the GOP can be independently played back as defined in the MPEG2 (Moving Picture Experts Group 2) standard, which is an image compression method employed when recording video information on the DVD 1 in the present embodiment. The smallest image unit.

  Here, the outline of the MPEG2 system will be described. In general, in continuous frame images, frame images before and after one frame image are often similar to each other and have a mutual relationship. The MPEG2 system pays attention to this point, and based on a plurality of frame images transferred several frames apart, another frame image existing between the plurality of frame images is interpolated based on the motion vector of the original image. It is a method to generate by. In this case, when recording the other frame image, it is only necessary to record the information about the difference and motion vector between the plurality of frame images. Thus, the other frame image can be reproduced. As a result, compressed recording of images becomes possible.

  Further, the outline of the GOP will be described with reference to FIG. FIG. 2 shows an example of a plurality of frame images constituting one GOP. FIG. 2 shows a case where one GOP 52 is composed of 12 frame images (the number of frame images included in one GOP 52 is not constant in the MPEG2 system). The frame image indicated by “I” is called an I picture (Intra-coded picture) and refers to a frame image that can reproduce a complete frame image only with its own image. A frame picture indicated by a code “P” is called a P picture (Predictive-coded picture), and a prediction that has been compensated and reproduced based on an already decoded I picture or another P picture. It is the prediction image produced | generated by decoding the difference with an image. A frame image indicated by a code “B” is called a B picture (Bidirectionally predictive-coded picture), and is recorded on an optical disc or the like as well as an already decoded I picture or P picture. A predicted image that is reproduced by using a future I picture or P picture for prediction. In FIG. 2, the prediction relationship (interpolation relationship) between the pictures is indicated by arrows.

  Note that the MPEG2 system used in the DVD 1 according to the present embodiment employs a variable rate system in which the amount of data included in each GOP 52 is not constant. That is, when each picture included in one GOP 52 corresponds to a fast moving video and the correlation between the pictures is small, the amount of data for configuring each picture increases. The amount of data included in the GOP 52 also increases. On the other hand, when each picture included in one GOP 52 corresponds to a moving image that does not move much and the correlation between the pictures is large, the amount of data for configuring each picture is also reduced. The amount of data included in the GOP 52 is also reduced.

  Next, the audio data 43 in the DVD 1 that is a feature of the present invention will be described.

  As the audio data 43 in the DVD 1, compressed audio data may be recorded or uncompressed audio data may be recorded. Of these, uncompressed audio data may be linear PCM ( Audio data 43 encoded by a method called “Pulse Code Modulation” is recorded. The physical structure in the case where the linear PCM audio data 43 is recorded on the DVD 1 will be described with reference to FIG. Note that the linear PCM audio data 43 in this embodiment is quantized with a 24-bit quantization bit number.

  As shown in FIG. 3, when recording linear PCM audio data 43 on the DVD 1, one audio data 43 (hereinafter referred to as audio pack AP) is a start indicating that the audio pack AP is started. A packet header 65 including identification information indicating that the data included in the audio pack AP is the audio data 43 starting with the pack header 64 including the code and the SCR and the like, and included in the audio pack AP. Additional information AD, which is information related to the audio data 43, and the audio data 43 included in the audio pack AP in units of reproduction divided into audio data 43 corresponding to a certain reproduction time (for example, 1/600 second). It is composed of a plurality of audio frames AF. Here, the additional information AD is included in the number of quantization bits when the audio data 43 is quantized by the linear PCM method (24 bits in the present embodiment), the sampling frequency at that time, and the audio data 43. Information such as the number of existing channels is described. Here, the number of channels included in the audio data 43 constitutes one channel by the audio data 43 to be output from one speaker, and more specifically, normal left and right When only audio data 43 to be reproduced from two speakers is included, the number of channels is “2”. When audio data 43 having a so-called surround effect is recorded, the number of speakers, for example, There are 4 channels.

  One audio frame AF is configured by the audio data 43 corresponding to the predetermined reproduction time in the following form.

  That is, one high-order data block including two high-order bit data 66 that are the high-order 16-bit audio data 43 among the audio data 43 for each channel quantized with 24 bits at one quantization timing One sample block SPB is constituted by the UB and one lower data block DB including two lower bit data 67 which are the audio data 43 of the lower 8 bits, and the sample block SPB is set at the predetermined reproduction time. A corresponding number of frames are connected to form one audio frame AF.

Further, the two upper bit data 66 included in the upper data block UB are 16 bits of upper bit data 66A (16A) quantized at the quantization timing corresponding to the even-numbered quantization timing in the linear PCM quantization. in Figure 3 indicated by "S _2n". a) shows 3 high order bit data 66B (FIG. 16-bit quantized in the quantization timing corresponding to odd-numbered by "S _{2n + 1".)} and contains Yes.

Also, the two lower bit data 67 included in the lower data block DB are quantization timings corresponding to even-numbered quantization timings at which the upper bit data 66A is generated, among the quantization timings in linear PCM quantization. The quantization is performed at the quantization timing corresponding to the odd-numbered quantization timing at which the 8-bit lower bit data 67A (indicated by “e _2n ” in FIG. 3) and the upper bit data 66B generated in FIG. 8 bits of lower bit data 67B (indicated by “e _{2n + 1} ” in FIG. 3). In FIG. 3, the numbers in parentheses in each of the upper bit data 66 and the lower bit data 67 indicate the number of bits of the respective data.

  Here, the upper bit data 66A and the lower bit data 67A constitute the 24-bit audio data 43 that is quantized at one quantization timing corresponding to the even number, and further, the upper bit data 66B. And the lower bit data 67B constitute 24-bit audio data 43 quantized at one quantization timing corresponding to the odd number. Therefore, if both the upper bit data 66A and the lower bit data 67A are combined and reproduced at the time of reproduction, the audio data 43 quantized with the original 24 bits can be reproduced, and similarly the upper bit data 66B and If both the lower bit data 67B are combined and reproduced at the time of reproduction, the audio data 43 quantized with the original 24 bits can be reproduced.

  Further, each upper bit data 66 and lower bit data 67 are composed of channel upper bit data 68 and channel lower bit data 69 for each channel. FIG. 3 shows a state in which four channels “A” to “D” are included as channels, and the numbers in parentheses in each channel upper bit data 68 or channel lower bit data 69 are as follows. The number of bits of each data is shown.

  In the playback device described later according to the present invention, when the audio decoder has only a processing capability corresponding to 16 bits, each channel lower bit data 69 is not played back. In this case, since the audio data 43 included in each channel lower bit data 69 is audio data corresponding to a quantization bit width that does not cause a problem in hearing even if it is not reproduced, it is reproduced. Even if it is not reproduced occasionally, there is no significant problem in hearing (in the meantime, the conventionally known CD has 16 bits of quantization bits, and the DVD 1 of the present embodiment has higher-quality audio data than the CD. 43 is recorded, so the maximum number of quantization bits is 24 bits).

  In the hierarchical recording format shown in FIG. 1 described above, each category is freely set by the producer of recording information to be recorded in the DVD 1 (hereinafter simply referred to as the producer) according to the intention. To be recorded. By performing reproduction for each of these sections based on the logical structure described later, various reproductions with various changes can be made.

  Next, a logical format (logical structure) in which information recorded by the physical division shown in FIG. 1 is combined will be described with reference to FIG. Note that the logical structure shown in FIG. 4 does not actually record information on the DVD 1 in that structure, but combines the data (particularly cell 20) shown in FIG. 1 with the logical structure shown in FIG. Information for reproduction (access information, time information, etc.) is recorded on the DVD 1, particularly in the control data 11.

  For clarification of the explanation, starting from the lower hierarchy of FIG. 4, by selecting and combining a plurality of cells 20 from the physical structure explained in FIG. It is logically constructed based on the intention of the producer. The program 60 is also a minimum logical unit that can be accessed by a command by a system controller in a playback apparatus described later by identifying a partition. Note that the producer can also define the program 60 as a minimum unit in which one or more programs 60 can be selected and viewed by the viewer, and this unit is referred to as PTT (Part Of Title).

  In addition, since one program 60 is logically configured by selecting a plurality of cells 20, one cell 20 is used in a plurality of programs 60, that is, one cell 20 is used in a plurality of different programs 60. It is also possible for the producer to reuse the so-called cell 20 to be reproduced.

  Here, the number of one cell 20 is handled as a cell ID number when the cell 20 is handled in the physical format shown in FIG. 1 (shown as cell ID # in FIG. 1), and is shown in FIG. When handled in the logical format, they are handled as cell numbers in the order of description in PGCI described later.

  Next, a plurality of programs 60 are combined to logically configure one PGC (Program Chain) 61 based on the intention of the producer. The above-described PGCI is defined in units of the PGC 61, and in the PGCI, the reproduction order of the cells 20 for each program 60 when the respective programs 60 are reproduced (the program unique to each program 60 by this reproduction order). A number is assigned), the address of the recording position of each cell 20 on the DVD 1, the number of the first cell 20 to be reproduced in one program 60, the reproduction method of each program 60 [information on the DVD 1 of this embodiment] When recording, random playback (random playback using random numbers, the same program 60 may be played multiple times), shuffle playback (random playback using random numbers similar to random playback). However, the same program 60 can only be played once, and the same program 60 can be played multiple times. ) Or loop playback (playing back one PGC 61 many times), or the producer chooses the playback method by combination of loop playback and random playback or shuffle playback for each PGC 61 Can be played back. ] And various commands (commands that can be specified by the producer for each PGC 61 or cell 20). The recording position of the PGCI on the DVD 1 is in the control data 11 (see FIG. 1) as described above. However, when the PGCI is a PGCI related to the menu in the video manager 2, the recording position of the PGCI is In the control data (not shown) included in the video manager 2.

  In addition to the PGCI, one PGC 61 includes data such as substantial video and audio as a combination of programs 60 (in other words, a combination of cells 20).

  Furthermore, in one PGC 61, it is possible to reuse the cell 20 shown in the description of the program 60 (that is, the same cell 20 is used by different PGC 61). In addition to the method of reproducing the cells 20 in the order stored in the DVD 1 (reproduction of continuously arranged cells), the cells 20 to be used are reproduced regardless of the order stored in the DVD 1 (for example, later The producer can select a method (reproduction of non-contiguously arranged cells), for example, reproducing the recorded cell 20 first.

  Next, one title 62 is logically configured by one or a plurality of PGCs 61. The title 62 is a unit corresponding to, for example, one movie, and is complete information that the producer wants to provide to the viewer of the DVD 1.

  One or more titles 62 logically constitute one VTS 63. The titles 62 included in the VTS 63 have common attributes. For example, a movie in a different language corresponds to each title 62 for one same movie.

  Further, information corresponding to one VTS 63 shown in FIG. 4 corresponds to information included in one VTS 3 shown in FIG. That is, all information logically included in the VTS 63 shown in FIG. 4 is recorded on the DVD 1 as a single VTS 3.

  Based on the logical format described above, the producer specifies the information divided in the physical structure, thereby forming a video (movie or the like) that the viewer should see.

  In the description of the physical structure shown in FIG. 1, it has been described that a plurality of cells 20 are recorded in the order of ID numbers in order to facilitate understanding of the contents. However, in the DVD 1 of the embodiment, actually, In some cases, one cell 20 is divided and recorded into a plurality of interleaved units IU shown in FIG.

  That is, for example, as shown in FIG. 5, the manufacturer configures one PGC 61A by the cells 20 having ID numbers 1, 2, and 4, and the other PGC 61B by the cells 20 having ID numbers 1, 3, and 4. Considering the case, when reproducing information from the DVD 1 based on the PGC 61A, only the cell 20 having ID numbers 1, 2, and 4 is reproduced, and when reproducing information from the DVD 1 based on the PGC 61B, Only the cell 20 having the ID numbers 1, 3 and 4 is reproduced. In this case, if the cells 20 are grouped for each ID number and recorded separately from each other, for example, in the case of the PGC 61A, the ID number 4 from the recording position on the DVD 1 of the cell 20 with the ID number 2 is recorded. It takes time to jump the pickup for playback to the recording position on the DVD 1 of the cell 20, and the cell 20 of ID number 2 and the cell 20 of ID number 4 are connected consecutively depending on the capacity of the track buffer in the playback apparatus described later. Playback (hereinafter referred to as seamless playback) cannot be performed.

  Therefore, in the case shown in FIG. 5, the input signal is temporarily input to the cell 20 with ID number 2 and the cell 20 with ID number 3 in accordance with the input / output processing speed in the track buffer in the playback apparatus described later. Even if the signal is stopped, the interleaved unit IU having a length that does not impair the continuity of the output signal (that is, the pickup in the playback apparatus jumps only during one interleaved unit IU, so that the input signal to the track buffer becomes Even if it is interrupted, the output signal from the track buffer is disassembled and recorded in an interleaved unit IU of a length that can be continuously output, and for example, when reproduced based on the PGC 61A, the ID number 2 Only the interleaved unit IU that constitutes the corresponding cell 20 is continuously detected and reproduced. Similarly, when reproducing based on the PGC 61B, only the interleaved unit IU constituting the cell 20 corresponding to the ID number 3 is continuously detected and reproduced. As described above, the length of the interleaved unit IU is determined in consideration of the capacity of the track buffer, and in addition to the performance of a drive mechanism such as a slider motor for performing track jumping. May be.

  In this manner, by recording one cell 20 divided into a plurality of interleaved units IU according to the intention of the producer, the track can be reproduced even when the PGC 61 including the cell 20 with the skipped ID number is reproduced. The signal output from the buffer is not interrupted, so that the viewer can view the reproduced video without interruption.

  When the interleaved unit IU is formed, the interleaved unit IU is formed so as to be completed within one VOB 10, and the one interleaved unit IU does not straddle a plurality of adjacent VOBs 10. As for the relationship between the interleaved unit IU and the VOB unit 30, one or more VOB units 30 are included in one interleaved unit IU, and one VOB unit 30 is included in one interleaved unit IU. The VOB unit 30 is not divided and straddles a plurality of interleaved units IU.

  Since it is necessary to record information in various layers as described above, the recording information having the above-described recording format is not limited to recording one movie as in the DVD 1 but is also an audio corresponding to the movie. Or, for subtitles and the like, it is particularly suitable for an information recording medium having a large storage capacity capable of recording audio or subtitles of a plurality of languages on the same optical disc.

(II) Embodiment of Recording Apparatus Next, an embodiment of a recording apparatus corresponding to the present application for recording the control information, video information and audio information on the DVD 1 will be described with reference to FIGS. To do.

  As shown in FIG. 6, the recording apparatus S1 according to the embodiment includes a VTR (Video Tape Recorder) 70, a memory 71, a signal processing unit 72, hard disk devices 73 and 74, a controller 75, and a multiplexer 76. And a modulator 77 and a mastering device 78 as a recording means.

  As shown in FIG. 7, the signal processing unit 72 includes a processing unit 72A, a quantizing unit 72B as a quantizing unit, a dividing unit 72C and a dividing unit 72D as a dividing unit, and a multiple recording information generating unit. The multiplexing unit 72E, the multiplexing unit 72F, and the control information generating unit 72G.

  Next, the operation will be described.

  In the VTR 70, recording information R which is a material such as audio information and video information to be recorded on the DVD 1 is temporarily recorded for each piece of information. The recording information R temporarily recorded in the VTR 70 is output to the signal processing unit 72 for each audio information or video information in response to a request from the signal processing unit 72.

  The processing unit 72A in the signal processing unit 72 performs A / D conversion on the input video information, and then performs compression processing using the MPEG2 system, and outputs a processed video signal Srv composed of the GOP 52. Then, the dividing unit 72C divides the processed video signal Srv into video packs (see FIG. 1) based on the time code Tt corresponding to the recording information R output from the VTR 70, and outputs the divided processed video signal Srvp. .

  On the other hand, the quantization unit 72B in the signal processing unit 72 quantizes the input audio information by the linear PCM method using the number of quantization bits of 24 bits, and outputs a quantized sound signal Sra.

  Then, the dividing unit 72D converts the 24-bit audio data 43 quantized at each quantization timing included in the quantized sound signal Sra and the upper 16-bit upper bit data 66 and the lower order at each quantization timing. The data is divided into 8-bit lower bit data 67 and a divided quantized sound signal Srap is output. At this time, the upper bit data 66 in the divided quantized sound signal Srap includes 16-bit channel upper bit data 68 for each channel, and further, the lower bit data 67 in the divided quantized sound signal Srap is included in the lower bit data 67 in the divided quantized sound signal Srap. Includes 8-bit channel lower bit data 69 for each channel (see FIG. 3).

  Next, the multiplexing unit 72E, from the upper bit data 66 and lower bit data 67 corresponding to each quantization timing included in the output divided quantized sound signal Srap, the upper bit data corresponding to the even-numbered quantization timing. 66A and upper bit data 66B corresponding to the odd-numbered quantization timing are extracted, and the upper bit data 66A and the upper bit data 66B are multiplexed so as to form the upper bit data block UB, and the upper bit data Lower bit data 67A corresponding to the even-numbered quantization timing that is the quantization timing at which data 66A was generated and lower-order bit data corresponding to the odd-numbered quantization timing that is the quantization timing at which upper bit data 66B was generated 67B are extracted, and these are the lower bit data Multiplexes and the low order bit data 67A and the low-order bit data 67B so as to constitute a lock DB. Further, the multiplexing unit 72E temporarily stores the upper bit data block UB configured as described above, and reads the upper bit data block UB and the lower bit data block DB so that the upper bit data block UB and the lower bit data block DB are adjacent to each other. The bit data block UB and the lower bit data block DB are multiplexed to form a sample block SPB, and a predetermined number of sample blocks SPB corresponding to a predetermined reproduction time (1/600 seconds) are grouped to form an audio frame AF. And output as a multiple quantized sound signal Srapp.

  After the audio frame AF is constructed, the additional information AD included in the control signal Si described later is multiplexed together with the pack header 64 and the packet header 65 for each predetermined number of sample blocks SPB. One audio pack AP shown in FIG. 3 is configured, and the multiple quantized sound signal Srapp includes a plurality of audio packs AP.

  Then, in the multiplexing unit 72F, based on the time code Tt, the divided processed video signal Srvp including the video pack output from the dividing unit 72C and the multiple quantized sound signal Srapp including the audio pack AP output from the multiplexing unit 72E are generated. It is multiplexed for each pack and output as a compressed multiplexed signal Sr. Thereafter, the output compressed multiplexed signal Sr is temporarily stored in the hard disk device 73. In the compressed multiplexed signal Sr, as shown in the top of FIG. 1 or FIG. 3, the video pack and the audio pack AP are multiplexed for each pack.

  In parallel with these, the memory 71 controls information for controlling the reproduction of the recorded information R (video manager 2, control data 11, and navigation pack 41 including PCI data 50 and DSI data 51 in FIG. 1). The control information input in advance based on the cue sheet ST in which is described is temporarily stored, and is output as a control information signal Si based on a request from the control information generation unit 72G included in the signal processing unit 72. The additional information AD included in the control information signal Si is output to the multiplexing unit 72E as described above.

  Then, based on the time code Tt and the control information signal Si output from the memory 71, the control information generation unit 72G separates the PCI data 50 and the DSI data 51 from the control information with reference to the time code Tt and corresponds. The PCI information signal Spci and the DSI information signal Sdsi are output, and the PCI information signal Spci and the DSI information signal Sdsi are temporarily stored in the hard disk device 74. At this time, control information other than the PCI data 50 and the DSI data 51 is not shown in FIGS. 6 and 7, but in the control information generation unit 72F as in the PCI data 50 and the DSI data 51. These are separated and stored in the hard disk device 74.

  The above processing is executed for the entire recording information R.

  When the above processing is completed for all of the recording information R, the controller 75 reads the compressed multiplexed signal Sr from the hard disk device 73 and reads the PCI information signal Spci and DSI information signal Sdsi and other control information from the hard disk device 74. Based on the above, additional information including PCI data 50, DSI data 51 and other control signals independently is generated and temporarily re-recorded in the hard disk device 74. This is because some pieces of control information have contents determined by the generation result of the compressed multiplexed signal Sr.

  On the other hand, the controller 75 performs time management of the operations of the signal processing unit 72 and the hard disk devices 73 and 74, and sends the additional information signal Sa corresponding to the additional information including the PCI information signal Spci and the DSI information signal Sdsi to the hard disk device. The information selection signal Scc for time-division multiplexing the compressed multiplexed signal Sr and the additional information signal Sa is generated and output.

  Thereafter, the compressed multiplexed signal Sr and the additional information signal Sa are read from the hard disk device 73 or 74 based on the information selection signal Scc from the controller 75, and are time-axis multiplexed by the multiplexer 76 as the information added compressed multiplexed signal Sap. Is output. At the stage of this information-added compression multiplexed signal Sap, the information to be recorded is synthesized with the control information, the video information, and the audio information by the switching operation using the information selection signal Scc of the controller 75, and the top stage of FIG. The physical structure (physical format) shown in FIG. Then, the PCI data 50 and the DSI data 51 are included in the navigation pack 41 independently of other control information.

  When sub-picture information is included in the information to be recorded, it is read from another hard disk device (not shown) and input to the signal processing unit 72, and signal processing is performed in the same manner as video information and audio information. And included in the information-added compressed multiplexed signal Sap.

  Thereafter, the modulator 77 applies an error correction code (ECC) such as a Reed-Solomon code and modulation such as 8-16 modulation to the output information-added compressed multiplexed signal Sap to generate a disc recording signal Sm. To the mastering device 78.

  Finally, the mastering device 78 records the disk recording signal Sm on a stamper disk that becomes a master (cutting die) when manufacturing the optical disk. Then, an optical disc as a commercially available replica disc is manufactured by a replication device (not shown) using this stamper disc.

  As described above, according to the recording apparatus S1 of the embodiment, the audio data 43 quantized with 24 bits is divided into the upper 16-bit upper bit data 66 and the lower 8-bit lower bit data 67. Since the upper bit data block UB and the lower bit data block DB are composed of two upper bit data 66 and lower bit data 67 corresponding to successive quantization timings, respectively, and recorded on the DVD 1, the audio data 43 At the time of reproduction, when the audio decoder has only a 16-bit processing capability, only the upper bit data block UB can be extracted and the upper bit data 66 included therein can be D / A converted and reproduced.

  When the audio decoder is capable of 24-bit D / A conversion processing, the upper bit data 66 and the lower bit data 67 are extracted and the corresponding upper bit data 66 and lower bit data 67 are paired for D / A. Can be converted. Further, since both the upper bit data 66 and the lower bit data 67 have a bit number that is a multiple of 8, the processing can be simplified in the 8-bit digital signal processing.

  Furthermore, the upper bit data block UB is configured by the upper bit data 66A corresponding to the even-numbered quantization timing and the upper bit data 66B corresponding to the odd-numbered quantization timing, and corresponds to the even-numbered quantization timing. Since the lower bit data block DB is constructed and recorded by the lower bit data 67A and the lower bit data 67B corresponding to the odd-numbered quantization timing, 24-bit D / A conversion processing is possible in the audio decoder of the playback device. In this case, it is possible to reduce the memory capacity required for combining the upper bit data 66 and the lower bit data 67 in the D / A conversion process.

  Also, regardless of the number of channels included in the audio data 43, the upper bit data block UB and the lower bit data block DB are both an integral multiple of 16 bits, which makes digital signal processing even easier.

(III) Embodiment of Reproducing Device Next, an embodiment of a reproducing device corresponding to the present application for reproducing the recorded information recorded on the DVD 1 by the recording device S1 will be described with reference to FIGS. explain.

  As shown in FIG. 8, the reproducing apparatus S2 according to the embodiment includes a pickup 80 as detection and demodulation means, a demodulation and correction unit 81 as detection and demodulation means, stream switches 82 and 84, a track buffer 83, and a system. A buffer 85, a demultiplexer 86, a VBV (Video Buffer Verifier) buffer 87, a video decoder 88, a sub-picture buffer 89, a sub-picture decoder 90, a mixer 91, an audio buffer 92, and an audio decoder 93; PCI buffer 94, PCI decoder 95, highlight buffer 96, highlight decoder 97, input unit 98, display 99, system controller 100, drive controller 101, spindle motor 102, slider motor 103 And composed by It is. The configuration shown in FIG. 8 describes only the portion related to the reproduction of video and audio in the configuration of the playback device S2, and is a servo for servo-controlling the pickup 80, the spindle motor 102, the slider motor 103, and the like. Since the circuit and the like are the same as those of the prior art, the description and detailed description are omitted.

  Next, the overall operation will be described.

  The pickup 80 includes a laser diode, a deflection beam splitter, an objective lens, a photodetector, and the like (not shown). The pickup 80 irradiates the DVD 1 with the light beam B as reproduction light, and reflects the reflected light from the DVD 1 on the light beam B. It receives light and outputs a detection signal Sp corresponding to information pits formed on the DVD 1 (in the DVD 1, the recorded information is recorded by forming information pits). At this time, the light beam B is accurately applied to the information track on the DVD 1 and is focused on the information recording surface on the DVD 1 with respect to an objective lens (not shown) in the same manner as in the prior art. Thus, tracking servo control and focus servo control are performed.

  The detection signal Sp output from the pickup 80 is input to the demodulation and correction unit 81, subjected to demodulation processing and error correction processing to generate a demodulation signal Sdm, and is output to the stream switch 82 and the system buffer 85.

  The stream switch 82 to which the demodulated signal Sdm is input is controlled to be opened and closed by the switch signal Ssw1 from the drive controller 101. When the stream switch 82 is closed, the input demodulated signal Sdm is directly passed through and output to the track buffer 83. On the other hand, when the stream switch 82 is opened, the demodulated signal Sdm is not output, and unnecessary information (signal) is not input to the track buffer 83.

  The track buffer 83 to which the demodulated signal Sdm is input is configured by a FIFO (First In First Out) memory or the like, temporarily stores the input demodulated signal Sdm, and when the stream switch 84 is closed, The stored demodulated signal Sdm is continuously output. The track buffer 83 compensates for the difference in data amount for each GOP in the MPEG2 system, and is discontinuous due to the track jump in the seamless playback described above when reading the data divided into the interleaved units IU. The demodulated signal Sdm that is input to is continuously output, and the reproduction interruption due to the discontinuity is eliminated.

  The stream switch 84 to which the demodulated signal Sdm is continuously input is used in the system so that in the demultiplexing process in the demultiplexer 86, the various buffers in the subsequent stage do not overflow or conversely become empty and the decoding process is not interrupted. Opening and closing is controlled by a switch signal Ssw2 from the controller 100.

  On the other hand, the system buffer 85 to which the demodulated signal Sdm is input in parallel with the track buffer 83 is detected first when the DVD 1 is loaded, and management information (video manager 2 etc.) relating to the entire information recorded on the DVD 1 or The control data 11 for each VTS 3 is accumulated and output to the system controller 100 as control information Sc, and the DSI data 51 for each navigation pack 41 is temporarily accumulated during reproduction and output to the system controller 100 as control information Sc. . In the demultiplexer 86 to which the demodulated signal Sdm is continuously input via the stream switch 84, the PCI for each video data 42, audio data 43, sub-picture data 44, and navigation pack 41 from the demodulated signal Sdm for each pack. Data 50 is extracted and output to a VBV buffer 87, a sub-picture buffer 89, an audio buffer 92, and a PCI buffer 94 as a video signal Sv, a sub-picture signal Ssp, an audio signal Sad, and a PCI signal Spc, respectively. Note that the demodulated signal Sdm may include a plurality of languages as separate streams as the audio data 43 or the sub-picture data 44. In this case, the desired signal is received by the stream selection signal Slc from the system controller 100. Are selected and output to the audio buffer 92 or the sub-picture buffer 89.

  At this time, the demultiplexer 86 extracts the pack header and the packet header from each pack (including the audio pack AP) and the packet, and outputs the information included in each to the system controller 100 as the header signal Shd.

  Further, the audio signal Sad includes audio data 43 divided into audio packs AP of the form shown in FIG. 3, and each audio pack AP includes additional information AD and a plurality of sample blocks SPB shown in FIG. It is included.

  The VBV buffer 87 to which the video signal Sv is input is configured by a FIFO memory or the like, temporarily stores the video signal Sv, and outputs it to the video decoder 88. The VBV buffer 87 is for compensating variation in the data amount for each picture (see FIG. 2) in the video signal Sv compressed by the MPEG2 system. Then, the video signal Sv in which the variation in the data amount is compensated is input to the video decoder 88, demodulated by the MPEG2 system, and output to the mixer 91 as a demodulated video signal Svd.

  On the other hand, the sub picture buffer 89 to which the sub video signal Ssp is input temporarily stores the input sub video signal Ssp and outputs it to the sub picture decoder 90. The sub picture buffer 89 is for outputting the sub picture data 44 included in the sub video signal Ssp in synchronization with the video data 42 corresponding to the sub picture data 44. Then, the sub-picture signal Ssp synchronized with the video data 42 is input to the sub-picture decoder 90, demodulated, and output to the mixer 91 as a demodulated sub-picture signal Sspd.

  Note that when the sub-video signal Ssp includes video information for configuring a frame, a selection button, and the like necessary for configuring and displaying the menu screen, highlight control from the system controller 100 is performed. Based on the signal Sch, the display state of a selection button or the like to be displayed is changed and output.

  The demodulated video signal Svd output from the video decoder 88 and the demodulated sub-video signal Sspd output from the sub-picture decoder 90 (synchronized with the corresponding demodulated video signal Svd) are mixed by the mixer 91, The video signal Svp to be finally displayed is output to a display unit such as a CRT (Cathode Ray Tube) (not shown).

  Next, the audio buffer 92 to which the audio signal Sad is input is configured by a FIFO memory or the like, and temporarily stores the input audio signal Sad and outputs it to the audio decoder 93. The audio buffer 92 is for outputting the audio signal Sad in synchronization with the video signal Sv or the sub-video signal Ssp including the corresponding video information, and delays the audio signal Sad according to the output status of the corresponding video information. Let The audio signal Sad time-adjusted so as to synchronize with the corresponding video information is output to the audio decoder 93, subjected to predetermined decoding such as D / A conversion, and the like as a demodulated audio signal Sadd to a speaker (not shown). Is output.

  In addition, when it is detected that it is necessary to temporarily interrupt (pause) the sound immediately after access to the desired information, the system controller 100 outputs a pause signal Sca to the audio decoder 93. The audio decoder 93 temporarily stops outputting the demodulated audio signal Sadd. The processing in the audio decoder 93 will be described in detail later, separately for a case where the audio decoder 93 has a 24-bit D / A conversion capability and a case where the audio decoder 93 has only a 16-bit D / A conversion capability.

  Further, the PCI buffer 94 to which the PCI signal Spc is input is configured by a FIFO memory or the like, and temporarily stores the input PCI signal Spc and outputs it to the PCI decoder 95. The PCI buffer 94 synchronizes the PCI data 50 included in the PCI signal Spc with the video data 42, the audio data 43, or the sub-picture data 44 corresponding to the PCI data 50, and the video data 42, the audio data 43, or the sub-data. This is to apply the PCI data 50 to the picture data 44 or the like. Then, the PCI signal Spc synchronized with the corresponding video data 42, audio data 43 or sub-picture data 44 by the PCI buffer 94 is separated from the highlight information included in the PCI data 50 by the PCI decoder 95, and the highlight signal Shi Are output to the highlight buffer 96, and a portion other than the highlight information of the PCI data 50 is output to the system controller 100 as a PCI information signal Spci.

  The highlight buffer 96 to which the highlight signal Shi is input is composed of a FIFO memory or the like, temporarily stores the input highlight signal Shi, and outputs it to the highlight decoder 97. The highlight buffer 96 accurately changes the display state of the selection item (select button) corresponding to the highlight information in response to the sub-video signal Ssp including the video information for the highlight information. It is a buffer for performing time axis compensation to be displayed. The highlight signal Shi subjected to time axis compensation is decoded by the highlight decoder 97, and information included in the highlight signal Shi is output to the system controller 100 as a demodulated highlight signal Shid. The demodulated highlight signal Shid includes information for setting a register in the system controller 100.

  Here, the system controller 100 outputs the highlight control signal Sch in order to change the display state based on the highlight information based on the demodulated highlight signal Shid. At this time, the system controller 100 validates the selection operation using the menu screen or the like based on the highlight information based on the valid period information indicating the valid period of the highlight information included in the demodulated highlight signal Shid. The selection operation based on the input signal Sin from the input unit 98 is accepted and the highlight control signal Sch is output.

  Further, the system controller 100 receives control information Sc input from the system buffer 85, a header signal Shd input from the demultiplexer 86, a PCI information signal Spci input from the system PCI decoder 95, and an input unit 98 such as a remote controller. On the basis of the input signal Sin, the switch signal Ssw2, the stream selection signal Slc, the pause signal Sca, and the highlight control signal Sch are output in order to perform correct reproduction corresponding to those signals, and the operation of the reproduction device S2 In order to display the situation or the like, a display signal Sdp is output to a display 99 such as a liquid crystal display device.

  Furthermore, when the system controller 100 detects from the DSI information signal Sdsi or the like that a track jump process such as a search is necessary for seamless playback, the system controller 100 instructs the drive controller 101 to perform the track jump process. A seamless control signal Scsl corresponding to is output.

  The drive controller 101 to which the seamless control signal Scsl is input outputs a drive signal Sd to the spindle motor 102 or the slider motor 103. In response to this drive signal Sd, the spindle motor 102 or the slider motor 103 moves the pickup 2 so that the light beam B is applied to the recording position on the DVD 1 to be reproduced (see the broken line arrow in FIG. 8) and rotates the DVD 1. The number is controlled by CLV (Constant Linear Velocity). In parallel with this, when the pickup 2 is moving and the demodulation signal Sdm is not output from the demodulation correction unit 81, the drive controller 101 outputs the switch signal Ssw1 based on the seamless control signal Scsl and opens the stream switch 82. At the same time, when the demodulated signal Sdm starts to be output, the stream switch 82 is closed and the demodulated signal Sdm is output to the track buffer 83.

  Next, the processing in the audio decoder 93 will be described in detail for a case where the audio decoder 93 has a 24-bit D / A conversion capability and a case where the audio decoder 93 has only a 16-bit D / A conversion capability.

First a first embodiment of (A) audio decoder, only 16-bit D / A conversion capability without the audio decoder 93 (hereinafter, referred to as an audio decoder _{93 -1.)} Configuration and the operation of, described with reference to FIG. 9 To do.

As shown in FIG. 9 (a), if the audio decoder 93 _-1, the audio decoder 93 _-1 extracts only high order bit data block UB from the audio pack AP included in the input audio signal Sad, extracted An extraction unit 93A as recording information block extraction means for outputting as a signal Sap, and decoding as reproduction processing means for D / A converting the upper bit data 66 included in the extraction signal Sap by 16 bits and outputting a demodulated audio signal Sadd Part 93B. Next, the operation will be described with reference to the flowchart shown in FIG.

As shown in FIG. 9 (b), in the audio decoder 93 _-1, the audio signal Sad is inputted from the audio buffer 92, first, in the extraction unit 93A, the audio pack AP included in the audio signal Sad Only the upper bit data block UB is extracted and the extraction signal Sap is output (step S1). The extraction of only the upper bit data block UB is performed from the beginning of the audio pack AP based on the information on the number of quantization bits in the additional information AD included in the audio pack AP and the number of channels included in the audio pack AP. The position of the upper bit data block UB is calculated, thereby extracting only the upper bit data block UB and discarding the lower bit data block DB (skip skipping).

  When only the upper bit data block UB is extracted from the audio pack AP (step S1), next, the decoding unit 93B extracts the upper bit data 66 included in the extraction signal Sap and is included in the upper bit data 66. The channel upper bit data 68 is extracted for each channel (step S2). Thereafter, the channel upper bit data 68 is D / A converted at 16 bits for each channel, and a demodulated audio signal Sadd is output (step S3).

  Then, it is determined whether or not the processing has been completed for all data (step S4). If the processing has been completed (step S4; YES), the processing is terminated. If the processing has not been completed (step S4; NO), the process returns to step S1 to process the next data.

  By the above operation, only the 16-bit upper bit data block UB is extracted and D / A conversion of the audio data 43 is performed, and a demodulated audio signal Sadd is output for each channel, and sound is output from a corresponding speaker (not shown). Is output as

(B) second embodiment of the audio decoder then the audio decoder 93 with a 24-bit D / A conversion capability configuration and operation (hereinafter, referred to as an audio decoder _{93 -2.),} Will be described with reference to FIG. 10 .

As shown in FIG. 10 (a), when the audio decoder 93-2, the audio decoder 93 _-2, the upper bit data block UB from the audio pack AP included in the input audio signal Sad and low order bit data block DB Are extracted from the upper bit data block UB and the lower bit data block DB included in the first extracted signal Sap1, respectively, and the first bit signal block UB and the lower bit data block DB included in the first extracted signal Sap1. 66 and lower bit data 67 are extracted for each channel and output as a second extracted signal Sap2, and a second extraction unit 93D as a quantized recording information extracting means, upper bit data 66 included in the second extracted signal Sap2, and The upper bit corresponding to the even-numbered quantization timing among the lower bit data 67 The bit data 66A and the lower bit data 67A corresponding to the even-numbered quantization timing are combined for each channel, and the upper bit data 66B corresponding to the odd-numbered quantization timing and the lower-order bit data corresponding to the odd-numbered quantization timing. The decoding unit 93E as a reproduction processing unit that combines the bit data 67B for each channel, reconstructs the 24-bit audio data 43, and performs D / A conversion for each channel to output a demodulated audio signal Sadd. It is comprised by.

  Next, the operation will be described with reference to the flowchart shown in FIG.

As shown in FIG. 10 (b), in the audio decoder 93 _-2, the audio signal Sad is inputted from the audio buffer 92, first, at the first extraction unit 93C, the audio packs included in the audio signal Sad The upper bit data block UB and the lower bit data block DB are extracted from the AP and output as the first extraction signal Sap1 (step S10). The extraction of the upper bit data block UB and the lower bit data block DB is performed based on the information on the number of quantization bits in the additional information AD included in the audio pack AP and the number of channels included in the audio pack AP. The positions of the upper bit data block UB and the lower bit data block DB from the head of the pack AP are calculated, and thereby the upper bit data block UB and the lower bit data block DB are individually extracted.

  When the upper bit data block UB and the lower bit data block DB are extracted from the audio pack AP (step S10), next, in the second extraction unit 93D, the upper bit data is extracted from the upper bit data block UB and the lower bit data block DB, respectively. Data 66 and lower bit data 67 are extracted for each channel and output as the second extraction signal Sap2 (step S11). In this extraction for each channel, in the upper bit data 66 and the lower bit data 67, the channel upper bit data 68 and the channel lower bit data 69 are included in advance as 16-bit and 8-bit delimiters, respectively. Since it is known, channel high-order bit data 68 is obtained by dividing and extracting 16 bits from the top of the extracted high-order bit data 66, and at the same time, by extracting and extracting 8 bits at a time from the top of the extracted low-order bit data 67. Channel lower bit data 69 is obtained.

  When the upper bit data 66 and the lower bit data 67 are extracted for each channel (step S11), the decoder unit 93E then temporarily stores the extracted upper bit data 66 and lower bit data 67. Thus, the upper bit data 66A corresponding to the even-numbered quantization timing and the lower bit data 67A corresponding to the even-numbered quantization timing are combined for each channel, and the odd-numbered quantization timing is supported. The higher-order bit data 66B and the lower-order bit data 67B corresponding to the odd-numbered quantization timing are combined for each channel, and the 24-bit audio data 43 is reconstructed (step S12). The reconstruction of the audio data 43 is performed for each audio frame AF. Then, the reconstructed 24-bit audio data 43 is D / A converted for each channel to output a demodulated audio signal Sadd (step S13).

  Then, it is determined whether or not the processing has been completed for all data (step S14). If the processing has been completed (step S14; YES), the processing is terminated. If the processing has not been completed (step S14; NO), the process returns to step S10 to process the next data.

  Through the above operation, the upper bit data block UB and the lower bit data block DB are extracted, D / A conversion of the 24-bit audio data 43 is performed, and a demodulated audio signal Sadd is output for each channel. The sound is output from a speaker that does not.

  As described above, according to the playback device S2 of the embodiment, in the DVD 1, the audio data 43 quantized with 24 bits is converted into the upper 16-bit upper bit data 66 and the lower 8-bit lower bit data 67. Since the upper bit data block UB and the lower bit data block DB are composed and recorded by the upper bit data 66 and the lower bit data 67, which are divided and correspond to two consecutive quantization timings, respectively, the audio decoder When the processing capability is only 16 bits, only the upper bit data block UB can be extracted and the upper bit data 66 included therein can be D / A converted and reproduced.

  When the audio decoder is capable of 24-bit D / A conversion processing, the upper bit data 66 and the lower bit data 67 are extracted and the corresponding upper bit data 66 and lower bit data 67 are paired for D / A. Can be converted. Further, since both the upper bit data 66 and the lower bit data 67 have a bit number that is a multiple of 8, the processing can be simplified in the 8-bit digital signal processing.

  Furthermore, the upper bit data block UB is configured by the upper bit data 66A corresponding to the even-numbered quantization timing and the upper bit data 66B corresponding to the odd-numbered quantization timing, and corresponds to the even-numbered quantization timing. Since the lower bit data block DB is constructed and recorded by the lower bit data 67A and the lower bit data 67B corresponding to the odd-numbered quantization timing, the audio decoder can perform 24-bit D / A conversion processing. Can reduce the capacity of the memory in the audio decoder required when the upper bit data 66 and the lower bit data 67 are combined in the D / A conversion process.

  Also, regardless of the number of channels included in the audio data 43, the upper bit data block UB and the lower bit data block DB are both an integral multiple of 16 bits, which makes digital signal processing even easier.

  In each of the above embodiments, the audio data 43 is recorded on the DVD 1 by the linear PCM method having the number of quantization bits of 24 bits, and among these, the upper 16 bits are the upper bit data 66 and the lower 8 bits. However, the present invention is not limited to this. However, the present invention is not limited to this, and upper 8 × m (m which has a great influence on the audibility when reproducing audio data quantized with 8 × n (n is a natural number) bits. <N and m is a natural number) bits are upper bit data, and lower 8 × r (r = n−m, r is a natural number) bits that have a small influence on hearing at the time of reproduction are lower bit data Is also applicable.

  Furthermore, the form of the information recording medium is not limited to the DVD 1 described above.

It is a figure which shows the physical structure (physical format) of recording information. It is a figure which shows the frame image which comprises GOP. It is a figure which shows the detailed structure of the physical structure of audio data. It is a figure which shows the logical structure (logical format) of recording information. It is a figure which shows the structure of an interleaved unit. FIG. 2 is a block diagram illustrating a schematic configuration of a recording apparatus. It is a block diagram which shows the detailed structure of a signal processing part. It is a block diagram which shows schematic structure of a reproducing | regenerating apparatus. It is a figure which shows 1st Embodiment of an audio decoder, (a) is a block diagram which shows schematic structure of the audio decoder of 1st Embodiment, (b) is a flowchart which shows operation | movement of the audio decoder of 1st Embodiment. It is. It is a figure which shows 2nd Embodiment of an audio decoder, (a) is a block diagram which shows schematic structure of the audio decoder of 2nd Embodiment, (b) is a flowchart which shows operation | movement of the audio decoder of 2nd Embodiment. It is.

Explanation of symbols

1 DVD
2 Video Manager 3, 63 VTS
10 VOB
11 Control data 20 cells 30 VOB unit 41 Navi pack 42 Video data 43 Audio data 44 Sub picture data 50 ... PCI data 51 DSI data 52 GOP
60 programs 61, 61A, 61B PGC
62 Title 64 Pack header 65 Packet header 66, 66A, 66B Upper bit data 67, 67A, 67B Lower bit data 68 Channel upper bit data 69 Channel lower bit data 70 VTR
71 Memory 72 Signal Processing Unit 72A Processing Unit 72B Quantization Unit 72C, 72D Division Unit 72E, 72F Multiplexing Unit 72G Control Information Generation Unit 73, 74 Hard Disk Device 75 Controller 76 Multiplexer 77 Modulator 78 Mastering Device 80 Pickup 81 Demodulation Correction Unit 82, 84 stream switch 83 track buffer 85 system buffer 86 demultiplexer 87 VBV buffer 88 the video decoder 89 the sub picture buffer 90 sub-picture decoder 91 mixer 92 the audio buffer 93, 93 _{-1, 93 -2} audio decoder 93A extractor 93B, 93E Decoding unit 93C First extraction unit 93D Second extraction unit 94 PCI buffer 95 PCI decoder 96 Highlight buffer 97 Highlight decoder 9 Input unit 99 Display 100 System controller 101 Drive controller 102 Spindle motor 103 Slider motor AP Audio pack AF Audio frame AD Additional information SPB Sample block UB Upper bit data block DB Lower bit data block B Light beam S1 Recording device S2 Playback device ST Queue sheet Sr compression multiplexed signal Srv processed video signal Srvp division processed video signal Sra quantized sound signal Srapp multiple quantized sound signal Srap divided quantized sound signal Si control information signal Sa additional information signal Scc information selection signal Sm disk recording signal Sap information additional compression Multiple signal Spci PCI information signal Sdsi DSI information signal Sp detection signal Sd drive signal Sdm demodulated signal Ssw1, Ssw2 switch signal Sin input signal Sdp display signal Scsl seamless control Signal Sc Control signal Slc Stream selection signal Sca Pause signal Sch Highlight control signal Shi Highlight signal Spc PCI signal Sad Audio signal Ssp Sub video signal Sv Video signal Svd Demod video signal Sspd Demod sub video signal Sadd Demod audio signal Svp Video signal Shid Demodulated highlight signal Shd Header signal Sap extracted signal Sap1 First extracted signal Sap2 Second extracted signal Tt Time code R Recording information

Claims (26)

Quantization means for quantizing recording information to be recorded consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits, and outputting quantized recording information;
The quantized recording information is divided into upper 8 × m (m <n and m is a natural number) bits of upper bit quantized recording information for each channel and the quantized information other than the upper bit quantized recording information. Dividing means for dividing into low-order bit quantized recording information which is encoded recording information;
Based on the divided upper bit quantized recording information and lower bit quantized recording information, the upper bit quantized recording includes a plurality of upper bit quantized recording information corresponding to successive quantization timings for each channel. An upper bit quantized recording information block that is used for reproducing the recording information using only the upper quantized recording information block, and a plurality of the lower bit quanta corresponding to the successive quantization timings. Low-order bit quantized recording information block that includes encoded recording information for each channel, and the low-order bit quantum used for the reproduction processing of the recording information using the low-order quantized recording information block and the high-order quantized recording information block of the recorded information blocks, constitute the upper bit quantized record information block and the low order bit quantized Symbol And configuring means for the information block to be adjacent to configure the recording information blocks, constituting the recording information unit comprising a plurality of said recording information blocks contiguous,
Addition for calculating either the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information or only the recording position of the upper bit quantized recording information on the information recording medium Additional information generating means for generating information;
Multiplex recording information generating means for multiplexing the recording information unit configured as described above and the generated additional information to generate multiplex recording information;
Recording means for recording the multiple recording information on the information recording medium;
A recording apparatus comprising: The recording apparatus according to claim 1,
The additional information includes at least quantized bit number information indicating the number of bits when the recording information is quantized and channel number information indicating the number of channels. apparatus. The recording apparatus according to claim 1 or 2,
The recorded information is sound information,
The quantization means quantizes the recording information with 24 bits for each of the channels,
Further, the dividing means uses the upper 16 bits of the quantized recording information as the upper bit quantized recording information, and the lower 8 bits of the quantized recording information of the quantized recording information. Is the lower-order bit quantized recording information. The recording apparatus according to any one of claims 1 to 3,
The multiplex recording information generating means configures an upper bit quantized recording information block with two upper bit quantized recording information corresponding to two consecutive quantization timings for each channel.
2. A recording apparatus comprising: a lower bit quantized recording information block comprising two lower bit quantized recording information corresponding to the second quantization timing. The recording apparatus according to any one of claims 1 to 4,
The recording means is a mastering device ;
The information recording medium is a stamper disk. The recording apparatus according to claim 5, wherein
A recording apparatus further comprising replication means for manufacturing a replica disk using the stamper disk.   A quantization step of quantizing recording information to be recorded consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits, and outputting quantized recording information;
  The quantized recording information is divided into upper 8 × m (m <n and m is a natural number) bits of upper bit quantized recording information for each channel and the quantized information other than the upper bit quantized recording information. A dividing step of dividing into low-order bit quantized recording information that is encoded recording information;
  Based on the divided upper bit quantized recording information and lower bit quantized recording information, the upper bit quantized recording includes a plurality of upper bit quantized recording information corresponding to successive quantization timings for each channel. An upper bit quantized recording information block that is used for reproducing the recording information using only the upper quantized recording information block, and a plurality of the lower bit quanta corresponding to the successive quantization timings. Low-order bit quantized recording information block that includes encoded recording information for each channel, and the low-order bit quantum used for the reproduction processing of the recording information using the low-order quantized recording information block and the high-order quantized recording information block And an upper bit quantized recording information block and a lower bit quantized recording block. A configuration step of the information block are adjacent to configure the recording information blocks, constituting the recording information unit comprising a plurality of said recording information blocks contiguous,
  Addition for calculating either the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information or only the recording position of the upper bit quantized recording information on the information recording medium An additional information generation step for generating information;
  A multiplex recording information generating step of generating multiplex recording information by multiplexing the configured recording information unit and the generated additional information;
  A recording step of recording the multiple recording information on the information recording medium;
  A recording method comprising: The recording method according to claim 7, wherein
The additional information includes at least quantized bit number information indicating the number of bits when the recording information is quantized and channel number information indicating the number of channels. Method. The recording method according to claim 7 or 8,
The recorded information is sound information,
The quantization step quantizes the recording information with 24 bits for each channel,
Further, the dividing step uses the upper 16 bits of the quantized recording information as the upper bit quantized recording information, and the lower 8 bits of the quantized recording information of the quantized recording information. Is the lower-order bit quantized recording information . In the recording method according to any one of claims 7 to 9 ,
The multiplex recording information generating step comprises, for each channel, configuring an upper bit quantized recording information block with two upper bit quantized recording information corresponding to two consecutive quantization timings,
A recording method comprising: forming a lower bit quantized recording information block by two lower bit quantized recording information corresponding to the second quantization timing . In the recording method according to any one of claims 7 to 10 ,
The recording process is a mastering process,
The recording method, wherein the information recording medium is a stamper disk . The recording method according to claim 11 ,
A recording method , further comprising a replication step of manufacturing a replica disk using the stamper disk .   Quantized recording information obtained by quantizing recording information consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits for each channel is the upper 8 for each channel. × m (m <n, where m is a natural number) bits of the upper bit quantized recording information that is the quantized recording information, and lower bit quantization that is the quantized recording information other than the upper bit quantized recording information It is divided into recorded information and
  Reproduction processing of the recording information using only the upper quantized recording information block, which is an upper bit quantized recording information block including a plurality of the upper bit quantized recording information corresponding to successive quantization timings for each channel A lower bit quantization recording information block including a plurality of lower bit quantization recording information corresponding to the quantization timing and a plurality of the lower bit quantization recording information corresponding to the quantization timing. An information block and a lower bit quantized recording information block used for the reproduction processing of the recorded information using the upper quantized recording information block, and
  The upper bit quantized recording information block and the lower bit quantized recording information block are adjacent to each other to form a recording information block,
  A recording information unit is composed of a plurality of continuous recording information blocks,
  Addition for calculating either the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information or only the recording position of the upper bit quantized recording information on the information recording medium An information recording medium comprising an information recording area in which information and a recording information unit configured as described above are recorded in a multiplexed structure. The information recording medium according to claim 13,
The additional information includes at least quantized bit number information indicating the number of bits when the recording information is quantized and channel number information indicating the number of channels. recoding media. The information recording medium according to claim 13 or 14,
The recorded information is sound information,
The quantized recording information is obtained by quantizing the recording information with 24 bits for each channel,
Further, the upper bit quantized record information is the quantized record information of the upper 16 bits of the quantized record information, and the lower bit quantized record information is the lower 8 bits of the quantized record information. An information recording medium which is quantized recording information . The information recording medium according to any one of claims 13 to 15 ,
The upper bit quantized recording information block is composed of two upper bit quantized recording information corresponding to two quantizing timings continuous for each channel,
2. The information recording medium according to claim 1, wherein the lower bit quantized recording information block is composed of two lower bit quantized recording information corresponding to the second quantization timing .   Quantized recording information obtained by quantizing recording information consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits for each channel is the upper 8 for each channel. × m (m <n, where m is a natural number) bits of the upper bit quantized recording information that is the quantized recording information, and lower bit quantization that is the quantized recording information other than the upper bit quantized recording information An upper bit quantized recording information block that is divided into recording information and includes a plurality of the upper bit quantized recording information corresponding to successive quantization timings for each of the channels, and only the upper quantized recording information block And a plurality of lower bits corresponding to the successive quantization timings. Sub-quantization record information block for each of the channels, and a low-order bit quantization record information block that is used for reproducing the record information using the low-order quantization record information block and the high-order quantization record information block A bit quantized recording information block, and a recording information block is configured by adjoining the upper bit quantized recording information block and the lower bit quantized recording information block, and a plurality of continuous recording information A recording information unit is configured by a block, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium, or only the recording position of the upper bit quantized recording information The additional information for calculating one of the above and the recording information unit configured as described above are multiplexed and recorded. From the information recording medium has a reproducing apparatus for reproducing the recorded information,
  Detecting and demodulating means for detecting the multiplex recording information for each of the channels from the information recording medium, demodulating and outputting the demodulated signal;
  Recording information block extracting means for extracting only the upper bit quantized recording information block from the demodulated signal;
  Reproduction processing means for reproducing the upper bit quantized recording information included in the extracted upper bit quantized recording information block and outputting the recording information;
  A playback apparatus comprising:   Quantized recording information obtained by quantizing recording information consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits for each channel is the upper 8 for each channel. × m (m <n, where m is a natural number) bits of the upper bit quantized recording information that is the quantized recording information, and lower bit quantization that is the quantized recording information other than the upper bit quantized recording information An upper bit quantized recording information block that is divided into recording information and includes a plurality of the upper bit quantized recording information corresponding to successive quantization timings for each of the channels, and only the upper quantized recording information block And a plurality of lower bits corresponding to the successive quantization timings. Sub-quantization record information block for each of the channels, and a low-order bit quantization record information block that is used for reproducing the record information using the low-order quantization record information block and the high-order quantization record information block A bit quantized recording information block, and a recording information block is configured by adjoining the upper bit quantized recording information block and the lower bit quantized recording information block, and a plurality of continuous recording information A recording information unit is configured by a block, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium, or only the recording position of the upper bit quantized recording information The additional information for calculating one of the above and the recording information unit configured as described above are multiplexed and recorded. From the information recording medium has a reproducing apparatus for reproducing the recorded information,
  Detecting and demodulating means for detecting the multiplex recording information for each of the channels from the information recording medium, demodulating and outputting the demodulated signal;
  Recording information block extraction means for extracting the upper bit quantized recording information block and the lower bit quantized recording information block from the demodulated signal;
  Quantization for extracting the upper bit quantized recording information and the lower bit quantized recording information corresponding to the upper bit quantized recording information from the extracted upper bit quantized recording information block and lower bit quantized recording information block Recording information extraction means;
  A playback apparatus comprising: playback processing means for combining the extracted upper bit quantized recording information and the lower bit quantized recording information and performing playback processing to output the recorded information. The playback device according to claim 17 or 18,
The additional information includes at least quantized bit number information indicating the number of bits when the recording information is quantized, and channel number information indicating the number of channels,
The recording information block extracting means specifies a recording position of at least one of the upper bit quantized recording information block or the lower bit quantized recording information block in the recording information unit based on the additional information. A reproducing apparatus characterized by the above. The playback device according to any one of claims 17 to 19,
The recorded information is sound information,
The quantized recording information is obtained by quantizing the recording information with 24 bits for each channel,
Further, the upper bit quantized record information is the quantized record information of the upper 16 bits of the quantized record information, and the lower bit quantized record information is the lower 8 bits of the quantized record information. A reproducing apparatus characterized by being quantized recording information . The playback device according to any one of claims 17 to 20 ,
The upper bit quantized recording information block is composed of two upper bit quantized recording information corresponding to two quantizing timings continuous for each channel,
The lower-order bit quantized recording information block is configured by two lower-order bit quantized recording information corresponding to the second quantization timing .   Quantized recording information obtained by quantizing recording information consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits for each channel is the upper 8 for each channel. × m (m <n, where m is a natural number) bits of the upper bit quantized recording information that is the quantized recording information, and lower bit quantization that is the quantized recording information other than the upper bit quantized recording information An upper bit quantized recording information block that is divided into recording information and includes a plurality of the upper bit quantized recording information corresponding to successive quantization timings for each of the channels, and only the upper quantized recording information block And a plurality of lower bits corresponding to the successive quantization timings. Sub-quantization record information block for each of the channels, and a low-order bit quantization record information block that is used for reproducing the record information using the low-order quantization record information block and the high-order quantization record information block A bit quantized recording information block, and a recording information block is configured by adjoining the upper bit quantized recording information block and the lower bit quantized recording information block, and a plurality of continuous recording information A recording information unit is configured by a block, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium, or only the recording position of the upper bit quantized recording information The additional information for calculating one of the above and the recording information unit configured as described above are multiplexed and recorded. After that the information recording medium to a reproducing method for reproducing the recorded information,
  Detecting and demodulating the multiplexed recording information for each channel from the information recording medium, demodulating and outputting as a demodulated signal;
  A recording information block extracting step for extracting only the upper bit quantized recording information block from the demodulated signal;
  A reproduction processing step of reproducing the upper bit quantized recording information included in the extracted upper bit quantized recording information block and outputting the recording information;
  A playback method characterized by comprising:   Quantized recording information obtained by quantizing recording information consisting of a plurality of channels constituting one stream with 8 × n (n is a natural number of 2 or more) bits for each channel is the upper 8 for each channel. × m (m <n, where m is a natural number) bits of the upper bit quantized recording information that is the quantized recording information, and lower bit quantization that is the quantized recording information other than the upper bit quantized recording information An upper bit quantized recording information block that is divided into recording information and includes a plurality of the upper bit quantized recording information corresponding to successive quantization timings for each of the channels, and only the upper quantized recording information block And a plurality of lower bits corresponding to the successive quantization timings. Sub-quantization record information block for each of the channels, and a low-order bit quantization record information block that is used for reproducing the record information using the low-order quantization record information block and the high-order quantization record information block A bit quantized recording information block, and a recording information block is configured by adjoining the upper bit quantized recording information block and the lower bit quantized recording information block, and a plurality of consecutive recording information blocks A recording information unit is configured, and the recording position of the upper bit quantized recording information and the recording position of the lower bit quantized recording information on the information recording medium, or only the recording position of the upper bit quantized recording information, Additional information for calculating one of the above and the configured recording information unit are multiplexed and recorded. A reproducing method for reproducing the recorded information from that information storage medium,
  Detecting and demodulating the multiplexed recording information for each channel from the information recording medium, demodulating and outputting as a demodulated signal;
  A recording information block extracting step for extracting the upper bit quantized recording information block and the lower bit quantized recording information block from the demodulated signal;
  Quantization for extracting the upper bit quantized recording information and the lower bit quantized recording information corresponding to the upper bit quantized recording information from the extracted upper bit quantized recording information block and lower bit quantized recording information block A record information extraction process;
  A reproduction processing step of combining the extracted upper bit quantized record information and lower bit quantized record information and reproducing the output to output the record information;
  A playback method characterized by comprising: The reproduction method according to claim 22 or 23,
The additional information includes at least quantized bit number information indicating the number of bits when the recording information is quantized, and channel number information indicating the number of channels,
In the recording information block extracting step, based on the additional information, a recording position of at least one of the upper bit quantized recording information block or the lower bit quantized recording information block in the recording information unit is specified. A reproduction method characterized by the above. The reproduction method according to any one of claims 22 to 24,
The recorded information is sound information,
The quantized recording information is obtained by quantizing the recording information with 24 bits for each channel,
Further, the upper bit quantized record information is the quantized record information of the upper 16 bits of the quantized record information, and the lower bit quantized record information is the lower 8 bits of the quantized record information. A reproduction method characterized by being quantized recording information . The reproduction method according to any one of claims 22 to 25 ,
The upper bit quantized recording information block is composed of two upper bit quantized recording information corresponding to two quantizing timings continuous for each channel,
The reproduction method according to claim 1, wherein the lower bit quantized recording information block is constituted by two lower bit quantized recording information corresponding to the second quantization timing .

Images