JP2003006985A - Information recorder and information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recorder which can multiplex a time code in a video signal without applying an excessive load on the device and can display correct time even in interactive recording information, and to provide an information reproducing device. SOLUTION: The information recorder is provided with a signal processing means to output a compressed multiple signal in which an audio signal and a compressed video signal are multiplexed, a means for creating reproduction added information which creates reproduction added information including time information according to each partial recorded information, a multiplexing means which multiplexes a reproduction added information signal in the compressed multiple signal and outputs an information multiplexed and compressed signal, and a recording means which records the information multiplexed and compressed signal on an information recording medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording device and an information reproducing device, and more particularly, to an information recording device for compressing a video signal, multiplexing it with an audio signal, and recording it on a recording medium such as an optical disk. The present invention relates to an information reproducing device which reproduces an audio signal and a video signal from a recording medium.

[0002]

2. Description of the Related Art In recent years, optical disks, magneto-optical disks, magnetic tapes and the like have been generally used as recording media for video information and audio information. Among them, optical discs and magneto-optical discs are relatively small (disc diameter is 1
2 cm or less) is widely popular because of its lightness.

On the other hand, with the recent progress of multimedia technology, there is an increasing demand for recording movies and the like on these optical disks and magneto-optical disks. In order to meet this demand, it is necessary to record video information and audio information for a long time on the above-mentioned optical disk or magneto-optical disk of a size that is convenient and convenient. Specifically, diameter 12c
It is desired to record a movie or the like corresponding to a show time of 60 minutes or more on the m optical disc.
For this purpose, it is indispensable to perform data compression and record the video information including the moving image and the corresponding audio information.

A common compression method used for this data compression is MPEG (Moving Picture Experts Gro), which is an international standardization conference for storage media moving image coding.
up) proposed method (hereinafter referred to as MPEG method)
Therefore, it has been attracting attention as a standard for a compression method by highly efficient encoding of video information.

The outline of the MPEG system will be described below. Generally, in continuous frame images,
In many cases, the frame images before and after one frame image are similar to each other and have a mutual relationship. The MPEG system pays attention to this point, and based on a plurality of frame images transferred with several frames separated, another frame image existing between the plurality of frame images is interpolated based on a motion vector or the like of the original image. It is a method to generate in. In this case, when recording the other frame image, only the information regarding the difference and the motion vector from the plurality of frame images is recorded, and at the time of reproduction, it is referred to and predicted from the plurality of frame images. Then, it becomes possible to reproduce the other frame image. As a result, the image can be compressed and recorded.

Here, in the MPEG system, a unit called GOP (Group Of Picture) is used as a minimum unit that can be independently reproduced independently without referring to other images. FIG. 10 shows an example of a plurality of frame images forming this one GOP. In FIG. 10, one GOP is composed of 12 frame images. Among them, the frame image indicated by the code “I” is an I picture (Intra-
Coded picture: An intra-coded image), which is a frame image that can reproduce a complete frame image only with its own image. Further, the frame image indicated by the code “P” is a P picture (Predictive-coded pictur).
e: forward predictive coded image), which is a predictive image generated by decoding the difference from the predictive image that is compensated and reproduced based on the already decoded I picture or other P picture. Further, the frame image indicated by the code “B” is
B picture (Bidirectionally predictive-coded pictu
re: bidirectional predictive coded image), which is reproduced not only by using an already decoded I picture or P picture but also by using a temporally future I picture or P picture recorded on an optical disk or the like for prediction. Predicted image. Figure 10
In Fig. 3, arrows indicate prediction relationships (interpolation relationships) between pictures.

Here, there are two different generation modes for the data generation amount of one GOP. FIG. 11A shows
The GOP is recorded by controlling the compression rate and the like so that the data generation amount for each GOP 100 is always constant. If the amount of generated data is constant, the address of each GOP and the amount of data are in a proportional relationship, so that the address corresponding to the target time can be easily searched. On the other hand, FIG. 11B shows a GOP generated without performing control such that the amount of generated data is constant. At this time, the recorded GOPs 101, 102, and 103 have different amounts of data contained therein. Now, paying attention to the amount of data generated when the recorded video information is reproduced, in an image in which the original image moves rapidly, the correlation between each picture is small, so an efficient compression method using the correlation is sufficient. Therefore, the amount of generated data in one GOP increases. On the other hand, in the case of an image in which the movement of the original image is small, the correlation between each picture is large, so that many efficient compression methods using the correlation can be used, and the amount of data generated in one GOP can be increased. Less. According to the method shown in FIG. 11A, since each GOP always has a constant data amount regardless of the content of the motion component of the original image, the image quality of a moving image deteriorates, and For a small number of images, the amount of data will be wasted. Therefore, in order to homogenize the image quality and use the recording capacity of the optical disk efficiently, the method shown in FIG. 11B is preferable.

Next, when the video information compressed by the above method is recorded on the optical disc, as shown in FIG. 12, the audio information which has been subjected to a predetermined process such as compression is stored in a packet in a constant data amount. It is time-divided into so-called data units and multiplexed into one data stream. Then, the time-division multiplexed video information and audio information are recorded in units of the above packets.

As shown in FIG. 13, time axis information is added to each packet of the thus-recorded multiple stream data for convenience of synchronization management and access during reproduction. In the MPEG system, this time axis information is called PTS (Presentation Time Stamp). PTS
Is the reproduction time of the video information or the audio information for each packet in 1 / 90,000 seconds as a unit (that is, 1 second =
90,000 PTS). When the video information and the audio information are multiplexed and recorded, as shown in FIG. 13, the same PTS is described and recorded in the corresponding video packet and audio packet. Therefore, the playback device refers to this PTS. Then, by synchronizing the packet of the video information and the packet of the audio information in which the same PTS is recorded, the corresponding video information and the audio information can be reproduced in synchronization.

On the other hand, the PTS can also be used as elapsed time information of information during reproduction. That is, the PTS obtained from the optical disc is stored at the start of reproduction, and the PTS detected during the reproduction is recorded as the PT at the start of reproduction.
If the difference from S is calculated and divided by 90,000, the elapsed time in the PTS detected in the middle from the start of reproduction can be known.

Further, in the MPEG type optical disc, there is a method of using the GOP header described at the head of the above-mentioned GOP as a method of knowing the elapsed time in reproduction.

According to this method, the GOP header is added to each GOP header.
14 is a method of describing the elapsed time information (time code) from the beginning of reproduction corresponding to the above. The format of this time code is shown in FIG.

In FIG. 14, "time code hours"
"Time code minutes", "time code seconds" and "t
"ime code pictures" indicates "hour", "minute", "second" and "frame" in the time code,
The "marker bit" is fixed to "1".

The "drop frame flag" indicates whether or not two frames should be skipped in a predetermined amount. The outline of this drop frame is shown below. NTSC (Nation, which has become popular in the field of image processing)
In the case of the al Television System Committee) system, the frame frequency is 29.97 Hz and is not an integer.
The number of frames per second cannot be specified accurately. That is,
When the elapsed time is displayed in hours, minutes, seconds, and frames, there are mixed cases where the carry from frame to second is 29 frames and 30 frames. Therefore, VTR (Video Tape)
In the time code used for Recorder, etc., the playback time actually displayed is adjusted using drop frames. That is, the digits of the time code are "00" and "0" from the start of each minute except "0", "10", "20", "30", "40" and "50".
The frames corresponding to the two frame numbers "1" are skipped to the second, and the digits of the time code are "0", "10", "20", "30", "40" and In the case of "50", 30 from "00" to "29"
The frame advances to the second. By this processing, it is possible to accurately specify and display the time code according to the NTSC system. In FIG. 14, “dr
In the GOP in which the "op frame flag" is "1", the above-mentioned "00" and "01" frames are skipped.

The compressed multiplexed signal which has been subjected to the above-mentioned processing is recorded on the optical disc at a constant bit rate.
Here, at the time of reproduction, when displaying the elapsed time (reproduction time) accompanying the reproduced video signal or audio signal or when searching for the video at a specific elapsed time, It is necessary to describe elapsed time information for each fixed unit.

[0016]

However, regarding the description of the elapsed time information, the above two methods have the following problems.

First, in order to obtain the elapsed time based on the PTS, the PTS at the start of reproduction is stored as described above, and the PTS at the start of reproduction is subtracted from the PTS detected during the reproduction. The process of dividing the difference by 90,000 is required. Also, in the case of continuous reproduction, 90000 / (30 / 1.001) = 3003 (PT
From S), it is necessary to increase the number of frames by 3003 PTS. Here, (30 / 1.001) is
Indicates the exact frame frequency in NTSC system, 3
003PTS corresponds to the time required to reproduce one frame. Furthermore, in addition to this, it is necessary to perform processing by taking into account the above-described drop frame when moving from frame to second, and the necessity of these processing imposes a heavy load on the signal processing controller that constitutes the playback device. There is a problem.

On the other hand, when the elapsed time is calculated based on the time code described in the GOP header (see FIG. 14), the time code can be easily obtained for each GOP, but the obtained time code is reproduced. There are the following problems in deciding which frame of the generated video signal is to be associated.

Here, in order to explain this problem, the operation of the signal processing unit in the conventional reproducing apparatus will be described.
This will be described with reference to FIG.

As shown in FIG. 15, in the signal processing section S'in the conventional reproducing apparatus, the demodulated signal SL from the demodulating section (not shown) is first transmitted to the system decoder 110.
Entered in. At this time, a video signal (video signal) and an audio signal (audio signal) are multiplexed in the demodulated signal SL. Then, the system decoder 110 extracts various headers from the demodulated signal SL, and further, the video signal SV.
And audio signal SU. At this time, the video signal SV and the audio signal SU remain in the compressed state. The video signal SV and the audio signal SU are
The signals are individually output to the audio decoder 111 and the video decoder 112, respectively subjected to decompression processing, and output as an audio decompression signal SAE and a video decompression signal SVE. Here, in the video decoder 112, each GO
The GOP header HG is extracted from P. Then, the audio expansion signal SAE is output to the D / A converter 113, D / A converted, output as the output audio signal SAO, and output as audio by a predetermined amplifier (not shown) or the like. On the other hand, the video decompression signal SVE is output to the multiplexing unit 114, is multiplexed with the reproduction time code TT 'which will be described later, and is output to the D / A converter 115 as the video multiplex signal SVT and is D / A converted to the output video signal SVO. It is displayed on a monitor (not shown).

In parallel with these processes, the system decoder 110 extracts the PTS in the packet when extracting various headers and outputs it as the PTS signal ST to the signal processing controller 116. Then, the signal processing controller 116 causes the PTSs of the audio signal and the video signal extracted by the system decoder 110, respectively.
, The audio start signal SAS and the video start signal SVS are output in order to synchronize the audio signal and the video signal (see FIG. 13). In the audio decoder 111 and the video decoder 112, these audio start signal SAS and video start signal SVS
By outputting the audio expansion signal SAE and the video expansion signal SVE based on
And the video expansion signal SVE are synchronized. Further, the signal processing controller 116 outputs the reproduction time code TT 'included in the GOP header HG extracted by the video decoder 112 to the multiplexing unit 114 and multiplexes it with the video expansion signal SVE.

In the above operation, the reproduction time code T
In determining which frame included in the video expansion signal SVE is to be multiplexed, it is necessary to perform multiplexing based on the PTS that defines the reproduction time of both the audio signal and the video signal. However, the above PT
Since S is extracted by the system decoder 110, the reproduction time code TT 'can be accurately converted into the video expansion signal SV.
In order to multiplex to E, the signal processing controller 116 always stores the latest PTS, reads the PTS immediately before the GOP header HG, and outputs the playback time code TT 'included in the GOP header HG. It is necessary to output the playback time code TT 'based on the value,
There is a problem that processing this processing every time the GOP header HG is output imposes a heavy burden on the signal processing controller 116.

Further, in displaying the elapsed time, there are the following problems due to the content of the video signal or the audio signal.

In the prior art, the above-mentioned PTS or G
The time code of the OP header is given as a serial number from the beginning of the record information regardless of the content of the record information.

By the way, when the recording information to be recorded including the video signal and the audio signal is divided into a plurality of partial recording information according to the contents, the partial recording information is divided along the time axis as shown in FIG. 16 (a). There may be interactive relationships as shown in. In the example illustrated in FIG. 16A, first, the video and audio indicating “Problem 1” are output as a moving image or a still image. Then, if the user inputs an answer and the answer is correct, the video and audio indicating "correct answer 1" is output, and if the user inputs an answer that is not correct, "wrong 1" Is output. And
It is assumed that after outputting “correct answer 1” or “wrong 1”, the video and audio indicating the next “problem 2” are output. At this time, the "wrong 1" screen is displayed longer than the "correct answer 1" screen in order to show what is wrong. When recording a video signal and an audio signal corresponding to the recording information having such a configuration, a series of multiplexed compressed signals as shown in FIG. 16B is obtained, and "correct answer 1" is obtained according to the answer input by the user. Or, it will jump to "wrong 1". However, the partial record information 121 corresponding to “correct answer 1” and the partial record information 122 corresponding to “wrong 1”
Since the length of each is different, "Problem 2" is passed through "Correct Answer 1"
The elapsed time from the beginning of the recorded information at the beginning of the "problem 2" when reaching the "No. 2" and the elapsed time from the beginning of the recorded information at the beginning of the "problem 2" when reaching the "Problem 2" via the "Error 1" Since the elapsed time is different from the time, the elapsed time information (in the PTS or GOP header) is a serial number that is added to the multiplex compressed signal shown in FIG. 16B from the beginning of the recorded information as the elapsed time information. There is a problem that time code) cannot be used. Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to multiplex a time code on a video expansion signal without imposing an excessive burden on a signal processing controller that constitutes a reproducing apparatus. An object of the present invention is to provide an information recording device and an information reproducing device which are capable of displaying accurate elapsed time even if the information is interactive.

[0026]

In order to solve the above problems, the recording apparatus of the present invention compresses the recording information divided into partial recording information and a video signal constituting the recording information by compression. In an information recording apparatus for recording a video signal and an audio signal forming the recording information on an information recording medium, a signal processing for outputting a compression multiplexed signal which is a signal obtained by multiplexing the audio signal and the compressed video signal. Means, reproduction additional information generating means for generating reproduction additional information including time information corresponding to each of the partial recording information, and the reproduction additional information signal is multiplexed with the compression multiplexed signal to output an information multiplexed compressed signal. It is characterized by comprising: a multiplexing means and a recording means for recording the information multiplexed compressed signal on the information recording medium.

In order to solve the above-mentioned problems, the reproducing apparatus of the present invention has a reproduction additional information including an audio signal and a compressed video signal divided into partial record information, and time information corresponding to the partial record information. An information reproducing apparatus for reproducing a recorded information recording medium, comprising: a reading unit for reading information from the information recording medium; and a control unit, the control unit comprising:
The time information is extracted, and the time is displayed based on the time information.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the following embodiments apply the present invention to an information recording apparatus for recording information on an optical disc as an information recording medium and an information reproducing apparatus for reproducing the recorded information from the optical disc on which the recorded information is recorded by the information recording apparatus. The case where it is applied will be described.

(I) Information Recording Device First, the configuration of the information recording device according to the embodiment will be described with reference to FIG. As shown in FIG. 1, an information recording apparatus S1 according to an embodiment includes a VTR 1 for temporarily recording record information such as audio information and video information to be recorded, and partial record information for each content type of the record information. Is a content signal pre-input based on the cue sheet ST in which the start time for each partial record information in the record information is recorded together with the content type corresponding to each partial record information. After the A / D conversion of the audio information and the video information output from the memory 2 and the memory 2 that stores the content signal including the start time of the partial recording information corresponding to each type of content and each content type, each GOP is performed by the MPEG method. The recording information is compressed, and the audio information and the video information are time-axis-multiplexed on a packet basis and output as a compressed multiplexed signal SR, and the recording information output from the VTR 1 Corresponding to the time code TT and the content signal S output from the memory 2
Based on I, a position signal SP indicating the start position in the recorded information of each GOP is output, and the time code T
Based on T and the content signal SI output from the memory 2,
The reproduction time when the partial record information is reproduced for each partial record information and the partial record information start address in the record information of each partial record information are detected, and the content information is generated together with the corresponding content type. A signal processing unit 3 that outputs SAC, a hard disk device 4 that temporarily stores the compressed multiplex signal SR, and a flexible disk (FD) that temporarily records the content information signal SAC and the position signal SP.
The device 5 and the entire information recording device S1 are controlled, and each partial recording is performed based on the compressed multiplexed signal SR read from the hard disk device 4 and the content information signal SAC and position signal SP read from the FD device 5. Structure additional information including the reproduction time of the information and the start address in the recorded information, and reproduction additional information including the elapsed time at the time of reproduction in each partial record information and the PTS of the video information reproduced at the elapsed time are generated. The additional information signal SA is formed by forming additional information from the additional structure information and the additional reproduction information, and the additional structure signal is time-separated from the compression multiplexed signal SR and recorded on the optical disc, and the additional reproduction information is recorded. A controller 6 which outputs an information selection signal SC for time-axis multiplexing at the head of each GOP in the compressed multiplexed signal SR, and information selection Based on the signal SC, the structure additional information in the additional information signal SA is time-separated from the compression multiplexed signal SR and added to the compression multiplexed signal SR, and the reproduction additional information in the additional information signal SA is added in the compression multiplexed signal SR. A multiplexer 7 as an additional multiplexing means (multiplexing means) for time-axis-multiplexing at the head of each GOP and outputting an information-added multiplex compression signal SAP, and for the information-added compression multiplex signal SAP, for example, a Reed-Solomon code or the like The error correction code (ECC) is added and the modulator 8 which performs modulation such as 8-15 modulation to generate the disc recording signal SM, and the master (cutout type) for manufacturing the disc recording signal SM from the optical disc. And a mastering device 9 as a recording means for recording on the stamper disk DKS.

Here, the signal processing unit 3 in the above configuration
Function as the first signal processing means, the second signal processing means and the third signal processing means, and the controller 6 functions as the structure additional information generating means, the reproduction additional information generating means, the additional multiplexing means and the multiplexing means.

Next, the operation of the information recording device S1 will be described.

The record information (audio information and video information) temporarily recorded in the VTR 1 is A in the signal processing unit 3.
After D / D conversion, it is compressed by MPEG method,
The signals are time-axis multiplexed into a compressed multiplexed signal SR, which is temporarily stored in the hard disk device 4.

In parallel with this, in the signal processing unit 3, based on the content signal SI including the content type and the start time for each partial record information input based on the description on the cue sheet ST and stored in the memory 2, A position signal SP indicating the start position in the recorded information of each GOP is output by referring to the time code TT input from the VTR 1, and the reproduction time and the reproduction time when the partial recorded information of each partial recorded information is reproduced. The partial recording information start address in the recording information of each partial recording information is detected, it is made content information together with the corresponding content type, and the corresponding content information signal SAC is output and temporarily stored in the FD device 5 together with the position signal SP. To be done. The above processing is executed for all the recorded information.

When the above processing is completed for all the recorded information, the controller 6 reads the compression multiple signal SR from the hard disk device 4 and the content information signal SAC and the position signal SP from the FD device 5, thereby adding the structure additional information and the reproduction. The additional information is generated and used as the additional information, and the additional information signal SA corresponding to the additional information is output. The contents of the structure additional information and the reproduction additional information will be described later.

Thereafter, the compressed multiplexed signal SR is multiplexed with the additional information signal SA. At this time, the structure-added information signal corresponding to the structure-added information is time-separated from the compressed multiplexed signal SR, and is recorded separately from the compressed multiplexed signal SR in the innermost peripheral portion (lead-in area) of the stamper disk DKS. Is added to the compression multiplexed signal SR. On the other hand, the reproduction additional information signal corresponding to the reproduction additional information is time-axis-multiplexed at the head of each GOP in the compressed multiplexed signal SR into a packet different from the packet containing the video information and audio information included in the GOP. In this way, the compression multiplexed signal SR is multiplexed (added) with the additional information signal SA to generate the information added multiplexed compressed signal SAP. Then, the information-added multiplexed compressed signal SAP is added with an error correction code (ECC) such as Reed-Solomon code by the modulator 8 and modulated such as 8-15 modulation, and the disc recording signal modulated by the mastering device 9 is obtained. SM is recorded on the stamper disk DKS. And this stamper disk DK
An optical disk as a replica disk that is generally commercially available is manufactured by using a replication device (not shown) using S.

Next, the structure additional information and the reproduction additional information generated in the controller 6 will be described with reference to FIGS. 2 to 5.

First, the structure addition information will be described with reference to FIG.

As shown in FIG. 2A, the structure additional information I
J is reproduction time data IJT in which each total reproduction time of each partial record information (see FIG. 16) is described, and start address data in which a start address in each record information of each partial record information is described. The structure additional information signal, which is composed of IJS and corresponds to this structure additional information IJ, is time-separated from the compressed multiplexed signal SR, as described above, and is stored in the innermost part of the stamper disk DKS as shown in FIG. 2B. It is recorded in the structure additional information area at the periphery.

Next, the reproduction additional information will be described with reference to FIGS.

First, the structure of the reproduction additional information will be described with reference to FIG.

As described above, the reproduction additional information SJ is stored in a packet (the stream ID of the packet is private stream 2 in the MPEG system) different from the video signal and the audio signal in the compressed multiplexed signal SR, Its structure is, as shown in Fig. 3 (a), paket start code pre
fix data SJP, stream id data SJS, PES
packet length data SJL and PTS of applied video
It is composed of data SJT and CELTC data SJC. Here, paket start code prefix data SJ
The 6-byte data of P, stream id data SJS, and PES packet length data SJL is a private stream 2 packet header in which the contents to be described by the MPEG system are fixed. Then, the data of the other part is defined so that the user can freely use it, and in this embodiment, the PTS of applied video data S is set.
JT (hereinafter referred to as PTS data SJT) and CELTC
Describe the data SJC. Here, PTS data SJT
Is an image to be played at the elapsed time described in the CELTC data SJC (the elapsed time in each partial record information, which is reset to “0” at the beginning of the partial record information). The PTS of information is described. In addition, as described above, the CELTC data SJC describes the elapsed time in each partial record information and the elapsed time that is reset to “0” at the head of the partial record information. Here, the structure of the CELTC data SJC will be described in more detail as shown in FIG. That is, for each of the hour, minute, second, and frame data, the tens digit and the ones digit are separated from each other, and 4 bits are allocated to each of them, and the total is 32 bits.

Next, the structure of the data stream when the reproduction additional information SJ is multiplexed on the compression multiplexed signal SR will be described in detail with reference to FIGS. 4 and 5.

As described in the prior art, when the compressed video signal PV is generated by compressing the video information, the length (data amount) of each GOP is usually as shown in FIG. It is variable depending on the data amount of the picture included in each. Then, as shown in FIG. 4B, one GOP includes a plurality of I pictures, B pictures, and the like.
The data amount of each picture is also different. Here, when the compressed video signal PV is time-multiplexed with the audio signal, as described above, the compressed video signal PV is divided into packets, which are a multiplexing unit of a constant data amount. Figure 4
It shows in (c). In FIG. 4C, the dotted line in the GOP indicates the boundary of each picture. A packet header PH is added to each packet P, and when one picture starts in one packet, the PTS of the picture corresponding to the packet header PH can be described. In the case of FIG. 4C, the first packet P
The PTSs corresponding to the third packet P and the third packet P can be described, but in the present embodiment, the PTS is described only in the first packet P of each GOP.

The portion indicated by the code SF in FIG. 4C shows the portion to which data has been added by stuffing. Here, the stuffing is a packet P.
In order to adjust the amount of data within
Indicates a hexadecimal number. ) ”Is added to data that is irrelevant to the actual video data. In the example shown in FIG. 4C, the stuffing is performed on the portion of the G that is less than the amount of data in each GOP.

The video signal which has been subjected to the above processing is multiplexed with the audio signal to form a compressed multiplexed signal SR.

Although the processing described so far is executed in the signal processing unit 3, the GO processing is performed by these processings.
The head of P and the head of packet P always match, and the packet P corresponding to the head of GOP is
As shown in (a), the PTS of the first picture in the GOP (indicated by the symbols PTS1 and PTS2 in FIG. 5A) is described.

Here, the frame frequency is set to 29.97 (3
0 / 1.001) Hz, P in FIG.
The difference between TSn and PTSn + 1 is 90000 / (30 / 1.001) × 15 = 45045 when the number of frames forming the GOP is 15, and each PTS in FIG. This corresponds to the display time of the first picture in the GOP during reproduction.

On the other hand, for audio information, for example, the compression unit is an audio unit, and the same processing as above is performed for each audio unit. Here, in this embodiment, since there is no concept of GOP in the voice information, when the voice unit starts in the packet P, P is written in the packet header PH of the voice unit.
The TS shall be described.

As shown in FIG. 5B, the reproduction additional information SJ of this embodiment is described by providing an additional packet PD different from the packet containing the video information and the audio information for each GOP ( PTS described in the GOP to which the additional packet PD belongs (PTS of the first picture in the GOP) is described in the packet header PH.

According to the information recording apparatus S1 described above,
Since reproduction additional information SJ including CELTC data SJC for each partial recording information and PTS data SJT corresponding to the CELTC data SJC is recorded together with the recording information, elapsed time information for the demodulated and expanded video information at the time of reproduction. It becomes easy to multiplex. Also, CELTC data SJC
However, since it is reset at the beginning of each partial record information, even when reproducing in the order different from the recording order of the partial record information, the CELTC data SJC in each partial record information is reproduced.
By adding, it is possible to display correct elapsed time information corresponding to the entire reproduced recorded information.

Further, since the additional structure information IJ including the additional reproduction information SJ, the reproduction time for each partial record information and the partial record information start address in the record information is recorded together with the record information, the reproduction of the record information is started at the time of reproduction. When a desired reproduction position with the position as the starting point is input, it is possible to detect the partial record information including the reproduction position,
The recorded information corresponding to the reproduction position can be quickly reproduced with the PTS as a reference.

Furthermore, at the time of reproduction, when a desired reproduction position starting from the starting position of the partial recording information is input, the partial recording information including the reproduction position can be detected and the PTS can be used as a reference. As a result, it is possible to quickly reproduce the record information corresponding to the reproduction position.

(II) Information reproducing apparatus As shown in FIG. 6, the information reproducing apparatus S2 according to the embodiment is
From the optical disc DK recorded as the disc recording signal SM, the information recording device S1 multiplexes (adds) the additional information signal SA including the structure additional information IJ and the reproduction additional information SJ to the compressed multiplex signal SR, and the disc recording signal is recorded. An optical pickup 10 as a detecting means for detecting SM and outputting it as a detection signal SPU, and a binarizer for binarizing the read detection signal SPU by a constant threshold value and outputting it as a binary signal SB. 11 and the binary signal SB is demodulated and error-corrected to obtain the demodulated signal S
A demodulator 12 as an extraction means for outputting L as a structure signal for extracting the structure additional information signal SIJ corresponding to the structure additional information IJ from the binary signal SB, and M for the demodulated signal SL.
A signal processing unit 13 that performs decompression processing by the PEG method, performs D / A conversion and outputs as an output video signal SAO and an output music signal SVO, and detects a clock component from the binary signal SB and outputs it as a detection clock signal CLKP. The clock component detector 14, the detected clock signal CLKP, and a reference clock signal CLK from an oscillator 17, which will be described later, are phase-compared to form a comparison signal, and a high frequency component is removed from the comparison signal to control the rotation speed of the spindle motor 16. Under the rotation speed control based on the rotation speed control signal SSP and the phase comparator 15 including an LPF (Low Pass Filter) output as the signal SSP,
The spindle motor 16 for rotating the optical disk DK, the oscillator 17 for outputting the reference clock signal CLK for timing synchronization between the respective members constituting the information reproducing apparatus S2, and the control of the entire information reproducing apparatus S2 are performed. Structure additional information IJ corresponding to the structure additional information signal SIJ
And a designation signal SZ for designating a reproduction position to be reproduced inputted from the remote controller 18 and a demodulator 1
Based on the address signal SAD corresponding to the address of the recorded information which is currently being reproduced, the designated signal SZ
The spindle control signal SE and the slider control signal SX for reproducing the partial record information corresponding to the reproduction position designated by are output, and the total elapsed time signal SAT indicating the total elapsed time in reproducing the record information is displayed. And a controller 20 for outputting to the display unit 19 as. Further, the controller 20 includes the signal processing unit 13
Control signal SCT for controlling the
3 and the control signal SCT sent from the signal processing unit 13 to the controller 20 includes the reproduction additional information signal SSJ corresponding to the reproduction additional information SJ extracted by the signal processing unit 13. ing. The optical pickup 10 is moved on the optical disk DK by the operation of a slider (not shown) based on the slider control signal SX, and reproduces the record information to be reproduced.

Here, the controller 20 functions as a total elapsed time calculating means, a reproduced partial recording information detecting means, a controlling means, and a partial recording information start position detecting means.

Further, as shown in FIG. 7, the signal processing unit 13
Extracts various headers from the demodulated signal SL from the demodulator 12 and also outputs the video signal SV and audio signal SU.
And a system decoder 21 for separating the audio signal SU, an audio decoder 22 for expanding the audio signal SU and outputting an audio expanded signal SAE, and an audio expanded signal SAE for D /
A D / A converter 24 for A-converting and outputting the output audio signal SAO, and a video expansion signal S for expanding the video signal SV.
The video decoder 23 that outputs VE and the video expansion signal S
A time division multiplex signal STCJ, which will be described later, is multiplexed on VE, and a multiplexing unit 25 for outputting a video multiplex signal SVT and a D for D / A converting the video multiplex signal SVT and outputting an output video signal SVO.
/ A converter 26 and a signal processing controller 2 described later
Based on the reproduction time code TTP and the time start signal STS from 7 and the time code buffer 28 which outputs the time code multiplexed signal STCJ, and the reference clock signal CLK from the oscillator 17, while controlling the entire signal processing unit 13, A signal processing controller 27 as an elapsed time information multiplexing means for exchanging a control signal SCT including a reproduction additional information signal SSJ with the controller 20.
It consists of and.

Here, regarding the output of the output video signal SVO and the output audio signal SAO by the signal processing unit 13 based on the control of the control signal SCT, the partial record information is recorded in order to reproduce the partial record information to be reproduced. While the optical pickup 10 is being moved to the position by the slider control signal SX, the output video signal SVO is the image immediately before the transfer as a still image, and the output audio signal SAO.
The output of will be interrupted.

Further, in the recording by the information recording apparatus S1, since the disk recording signal SM is modulated so that the clock can be self-extracted at the time of reproduction, the clock component detector 14 extracts the extracted clock signal CLKP. Can be detected.

Next, regarding the operation of the information reproducing apparatus S2,
A reproduction operation using the structure additional information IJ and the reproduction additional information SJ will be mainly described with reference to FIGS. 6 to 9.

First, the reproduction operation using the reproduction additional information SJ will be described together with the operation of the signal processing unit 13.

As shown in FIG. 7, in the signal processing unit 13, the demodulated signal SL from the demodulator 12 is input to the system decoder 21. At this time, the demodulated signal SL has a video signal (video signal) and an audio signal (audio signal) multiplexed. Then, the system decoder 21 extracts various headers from the demodulated signal SL, and further, the video signal S
Separated into V and audio signal SU. At this time, the video signal SV and the audio signal SU remain in the compressed state. This video signal SV and audio signal SU
Are separately output to the audio decoder 22 and the video decoder 23, respectively subjected to expansion processing and output as an audio expansion signal SAE and a video expansion signal SVE. The audio expansion signal SAE is D / A
It is output to the converter 24, D / A converted, output as an output audio signal SAO, and output as audio by a predetermined amplifier or the like not shown. On the other hand, the video decompression signal SVE is output to the multiplexing unit 25, and the time code multiplexing signal S described later is obtained.
The signal is multiplexed with TCJ and output as a video multiplexed signal SVT to the D / A converter 26 for D / A conversion, and displayed as an output video signal SVO on a monitor or the like not shown.

In parallel with these processes, the system decoder 21 extracts the PTS in the packet header contained in the demodulated signal SL when extracting various headers, and outputs the PTS.
The signal ST is output to the signal processing controller 27.
Further, in parallel with this, the system decoder 21 extracts the reproduction additional information SJ from the additional packet PD, and the CELTC data SJC and the CELTC data SJC included therein.
To the signal processing controller 27 as the elapsed time signal STT. Here, since only one reproduction additional information SJ is included in each GOP as described above, the elapsed time information corresponding to the frames other than the frame corresponding to the picture reproduced at the beginning of each GOP is the signal. It is calculated in increments for each frame in the processing controller 27. The elapsed time information thus generated is output to the time code buffer 28 as a reproduction time code TTP and temporarily stored. And
Based on the PTS signal ST, the signal processing controller 27 refers to the PTS of the audio signal SU and the video signal SV and the PTS of the reproduction additional information SJ included in the elapsed time signal STT to refer to the audio signal SU and the video signal having the same PTS. In order to output SV and playback time code TTP at the same time, audio start signal SAS, video start signal SVS and time start signal STS are output to audio decoder 22, video decoder 23 and time code buffer 28, respectively. According to the video start signal SVS and the time start signal STS, the video decoder 23 outputs the video expansion signal SVE, and the time code buffer 28 outputs the video expansion signal SVE.
Time code multiplexed signal S corresponding to the video signal included in
TCJ is output, and these are multiplexed by the multiplexing unit 25. At this time, since the corresponding video expansion signal SVE and time code multiplex signal STCJ are simultaneously output and multiplexed with PTS as a reference, the correct time code can be multiplexed with the video expansion signal SVE.

Here, the elapsed time information (CE which is included in the reproduction additional information SJ extracted by the system decoder 21
Since the LTC data SJC) is reset at the beginning of each partial record information, the time code multiplexed in the video expansion signal SVE is also set to "0" at the beginning of each partial record information. Further, the signal processing controller 27 is internally provided with a time code counter (not shown), and this counter has elapsed time information (CELTC data S in the reproduction additional information).
JC) and is incremented each time the video frame corresponding to the picture changes.

On the other hand, the reproduction additional information SJ is output from the signal processing controller 27 to the controller 20 as a control signal SCT.

As a result of the above processing, regarding the result of adding the elapsed time information for each partial record information, the result of adding the elapsed time information to the interactive record information as shown in FIG. 16 is shown in FIG. Show. As shown in FIG. 8A, in each of the partial record information 120 to 123, each partial record information is continuous within the partial record information and is reset at the head of each partial record information to be “0”. Elapsed time information (0, 1, 2, ...) Is added.

Therefore, when the elapsed time from the beginning of the recorded information is displayed for the interactive recorded information shown in FIG. 8A, for example, as shown in FIG. If the answer input next to the partial record information 120 indicating “corresponding to correct answer 1” corresponds to the elapsed time in the partial record information 121 indicating “correct answer 1”, the partial record information indicating “problem 1” A value obtained by adding the last elapsed time of 120 is the elapsed time in the partial record information 121 indicating the “correct answer 1”. Similarly, the partial record information 12 indicating "problem 2" next to the partial record information 121 indicating "correct answer 1" is displayed.
3, the partial record information 123 indicating “problem 2” at the last elapsed time of the partial record information 121 indicating “correct answer 1”.
The elapsed time in the partial record information 123 indicating the “problem 2” is added. Figure 8 (c)
Similarly, in the case shown in, the partial record information 1 indicating "problem 1"
The elapsed time is added in the order of 20, the partial record information 122 indicating “Error 1”, and the partial record information 123 indicating “Problem 2”. This adding operation is performed by the controller 20 based on the reproduction additional information SJ input to the controller 20 as the control signal SCT, and is displayed on the display unit 19 as the total elapsed time signal SAT indicating the total elapsed time when the recorded information is reproduced. The correct total elapsed time is displayed regardless of the reproduction route of the recorded information.

In this embodiment, the time record multiple signal STCJ including the elapsed time information is multiplexed with the video expansion signal SVE. However, as described above, the elapsed time for each partial record information is added. It is also possible to obtain the total elapsed time information, multiplex this information with the video expansion signal SVE, and display the total elapsed time together with the display of the output video signal SAD.

Next, the reproducing operation using the structure addition information IJ will be described with reference to FIG.

As described above, the structure addition information IJ is extracted by the demodulation unit 12 and output to the controller 20 as the structure addition information signal SIJ and stored therein.

This structure additional information IJ is shown in FIG. 9B in the case of non-interactive recording information as shown in FIG. 9A.
It is described as shown in. Here, for example, in FIG.
Designation to access the portion of time "x" (the time "x" is in the middle of Chapter 3 in FIG. 9A) from the start of reproduction of the recorded information shown in (a). When the signal SZ is input from the remote controller 18, the controller 2
0 performs the following operation.

(1) Based on the reproduction time data IJT included in the structure additional information SJ (FIG. 9B), the recording information corresponding to the time "x" from (m + n) <x <(m + n + k) Is included in Chapter 3.

(2) Based on the start address data IJS contained in the structure additional information SJ (FIG. 9B), the third
Get chapter start address "C".

(3) a = x-m-n is calculated to detect the position where the elapsed time information (CELTC data SJC) in the reproduction additional information SJ of the partial record information corresponding to Chapter 3 is "a". ,
A slider control signal SX is output to move the optical pickup 10 to a position on the optical disk DK corresponding to that position.

(4) Playback is started from the position of the elapsed time "a" in Chapter 3.

Structure additional information I when the above is not interactive
This is a reproducing operation using J.

Next, the reproducing operation using the structure addition information IJ in the case of the interactive recording information as shown in FIG. 8 will be described.

In the case of the interactive recording information as shown in FIG. 8, the structure addition information IJ is described as shown in FIG. 9 (c). Here, for example, when the remote controller 18 inputs the designation signal SZ indicating that the time "y" has elapsed from the start of reproduction of "problem 2" of the recorded information shown in FIG. 8, the controller 20 causes the following: It operates like this.

(1) The start address "d" of Problem 2 is acquired based on the start address data IJS included in the structure additional information SJ (FIG. 9C).

(2) Elapsed time information (CELTC data SJ in reproduction additional information SJ of partial record information corresponding to problem 2)
C) detects the position of "d" and outputs the slider control signal SX to move the optical pickup 10 to the position on the optical disk DK corresponding to the position.

(3) Playback is started from the position of the elapsed time "d" in Problem 2.

The above is the reproduction operation using the structure addition information IJ in the case of interactive recording information. As described above, according to the reproduction operation of the information reproducing apparatus S2 using the reproduction additional information SJ and the structure additional information IJ, the reproduction additional information SJ
Since the elapsed time information (CELTC data SJC) contained in is multiplexed with the video signal expanded based on the corresponding PTS, the video signal and the elapsed time information can be easily multiplexed, and the information reproducing apparatus S2 The elapsed time information can be multiplexed with the demodulated and expanded video information without increasing the load on the signal processing controller 27 in FIG.

Further, since the elapsed time information is reset at the head of each partial record information, and added in the reproduction order of the partial record information and displayed as the total elapsed time, the recording order and the reproduction order for each partial record information. The correct total elapsed time corresponding to the entire reproduced recorded information can be displayed even when the difference is different.

Therefore, the correct total elapsed time can be displayed even when the interactive recording information is reproduced.

Further, since the reproduction additional information SJ and the structure additional information IJ are detected together with the record information, when a desired reproduction position with the reproduction start position of the record information as a starting point is input, a part including the reproduction position is inputted. The record information can be detected, and the record information corresponding to the reproduction position can be rapidly reproduced with the PTS as a reference. Furthermore, even when the recording order and the reproduction order are different for each partial record information in the reproduction of the record information, when the desired reproduction position whose starting point is the start position of the partial record information is input, the reproduction position is changed. It is possible to detect the partial record information including the record information, and it is possible to quickly reproduce the record information corresponding to the reproduction position based on the PTS. (III) Modified Embodiment In the above embodiments, the structural additional information IJ is recorded in the innermost peripheral portion of the optical disc, but the present invention is not limited to this, and a plurality of recorded information can be recorded on one optical disc. In some cases, they are for example ISO (Internatio
nal Organization for Standarization) 9660, and the structure additional information IJ may be described at the beginning of each file.

Further, the remote controller 18 may be a keyboard or the like.

[0085]

As described above, according to the recording apparatus of the present invention, since the time information is recorded together with the record information for each partial record information, it becomes easy to multiplex the time information with the demodulated video information. .

According to the reproducing apparatus of the present invention, since the time is displayed based on the time information, it is possible to display the correct time corresponding to the entire reproduced record information. Therefore, the correct time can be displayed even when the interactive recorded information is reproduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration block diagram of an information recording apparatus according to an embodiment.

2A and 2B are diagrams illustrating structure addition information, FIG. 2A is a diagram showing the structure, and FIG. 2B is a diagram showing recording positions on a stamper disk.

3A and 3B are diagrams for explaining reproduction additional information, FIG. 3A is a diagram showing the structure thereof, and FIG. 3B is a diagram showing CELTC data SJ.
It is a figure which shows the structure of C.

FIG. 4 is a diagram showing a relationship between GOP and packets,
(A) is a figure which shows GOP in a compressed video signal, (b) is a figure which shows the picture which comprises one GOP, (c) is a figure which shows the state which divided one GOP into packets. Is.

FIG. 5 is a diagram for explaining a PTS addition position, (a)
FIG. 4 is a diagram showing a relationship between GOP and PTS, and FIG. 7B is a diagram showing a relationship between information-added multiplex compression signal and PTS.

FIG. 6 is a schematic block diagram of an information reproducing apparatus according to an embodiment.

FIG. 7 is a schematic configuration block diagram of a signal processing unit.

FIG. 8 is a diagram showing formation of a time code in interactive recording information, (a) is a diagram showing elapsed time information for each partial recording information, and (b) is an input answer “correct answer 1”.
It is a figure which shows the time code of the whole record information in the case of responding to, and (c) is a figure which shows the time code of the whole record information in case the input answer corresponds to "mistake 1".

9A and 9B are diagrams illustrating access using structure additional information, FIG. 9A is a diagram showing elapsed time information for each partial record information in the case of non-interactive record information, and FIG. )
FIG. 9 is a diagram showing an example of a structure of structure additional information corresponding to the record information shown in FIG. 8, and FIG. 9C is a diagram showing an example of a structure of structure additional information in the case of the interactive record information shown in FIG. 8. .

FIG. 10 is a diagram showing frame images forming a GOP.

FIG. 11 is a diagram showing a data generation amount of GOP,
(A) is a figure which shows the case where the data generation amount of each GOP is constant, and (b) is a figure which shows the case where the data generation amount of each GOP is variable.

FIG. 12 is a diagram illustrating formation of multiple streams.

FIG. 13 is a diagram illustrating synchronization between a video stream and an audio stream.

FIG. 14 is a diagram showing a structure of a time code in a GOP header.

FIG. 15 is a schematic configuration block diagram of a signal processing unit of a conventional technique.

FIG. 16 is a diagram for explaining reproduction and recording of interactive recording / recording information, and FIG. 16 (a) is a diagram for explaining a reproduction state;
FIG. 7B is a diagram illustrating a recording state.

[Explanation of symbols]

1 ... VTR 2 ... memory 3 ... Signal processing unit 4 ... Hard disk drive 5: FD device 6, 20 ... Controller 7 ... Multiplexer 8 ... Modulator 9 ... Mastering device 10 ... Optical pickup 11 ... Binarizer 12 ... Demodulator 13, S '... Signal processing unit 14 ... Clock component extractor 15 ... Phase comparator 16: Spindle motor 17 ... Oscillator 18 ... Remote control 19 ... Display 21, 110 ... System decoder 22, 111 ... Audio decoder 23, 112 ... Video decoder 24, 26, 113, 115 ... D / A converter 25, 114 ... Multiplex part 27, 116 ... Signal processing controller 28: Time code buffer 100, 101, 102, 103 ... GOP 120, 121, 122, 123 ... Partial record information DKS: Stamper disc DK: Optical disc S1 ... Information recording device S2 ・ ・ ・ Information playback device SI ・ ・ ・ Content signal SP ・ ・ ・ Position signal SAC: Content information signal SR: Compressed multiplexed signal SA ・ ・ ・ Additional information signal SC ・ ・ ・ Information selection signal SAP: Information-added multiple compressed signal SM: Disc recording signal SPU ・ ・ ・ Detection signal SX ・ ・ ・ Slider control signal SE ・ ・ ・ Spindle control signal SSP: Rotation speed control signal SB: Binary signal SAD: Address signal SIJ ・ ・ ・ Structure additional information signal SZ: Designation signal SAT: Total elapsed time signal SL ・ ・ ・ Demodulated signal SAO: Output video signal SVO: Output voice signal SCT: control signal CLK: Reference clock signal CLKP: Detection clock signal TT: Time code TTP, TT '... Playback time code STT ・ ・ ・ Elapsed time signal ST ・ ・ ・ PTS signal SU ・ ・ ・ Audio signal SV ・ ・ ・ Video signal SAS: audio start signal SVS ・ ・ ・ Video start signal STS ・ ・ ・ Time start signal STCJ ・ ・ ・ Time code multiplexed signal SVE ・ ・ ・ Video expansion signal SAE ・ ・ ・ Audio expansion signal SVT ・ ・ ・ Video multiplexed signal IJ ... Additional structure information IJT: Playback time data IJS ... Start address data SJ: Additional reproduction information SJP ・ ・ ・ paket start code prefix data SJS ・ ・ ・ stream id data SJL ・ ・ ・ PES packet length data SJT ・ ・ ・ PTS of applied video data SJT SJC ・ ・ ・ CELTC data PV: Compressed video signal P ... Packet PH: Packet header SF ... Stuffing area PD: Additional packet PV: Video packet PA: Voice packet HG: GOP header

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 10, 2002 (2002.7.1)
0)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Information recording apparatus and information reproducing apparatus

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording device and an information reproducing device, and more particularly, to an information recording device for compressing a video signal, multiplexing it with an audio signal, and recording it on a recording medium such as an optical disk. The present invention relates to an information reproducing device which reproduces an audio signal and a video signal from a recording medium.

[0002]

2. Description of the Related Art In recent years, optical disks, magneto-optical disks, magnetic tapes and the like have been generally used as recording media for video information and audio information. Among them, optical discs and magneto-optical discs are relatively small (disc diameter is 1
2 cm or less) is widely popular because of its lightness.

On the other hand, with the recent progress of multimedia technology, there is an increasing demand for recording movies and the like on these optical disks and magneto-optical disks. In order to meet this demand, it is necessary to record video information and audio information for a long time on the above-mentioned optical disk or magneto-optical disk of a size that is convenient and convenient. Specifically, diameter 12c
It is desired to record a movie or the like corresponding to a show time of 60 minutes or more on the m optical disc.
For this purpose, it is indispensable to perform data compression and record the video information including the moving image and the corresponding audio information.

A common compression method used for this data compression is MPEG (Moving Picture Experts Gro), which is an international standardization conference for storage media moving image coding.
up) proposed method (hereinafter referred to as MPEG method)
Therefore, it has been attracting attention as a standard for a compression method by highly efficient encoding of video information.

The outline of the MPEG system will be described below. Generally, in continuous frame images,
In many cases, the frame images before and after one frame image are similar to each other and have a mutual relationship. The MPEG system pays attention to this point, and based on a plurality of frame images transferred with several frames separated, another frame image existing between the plurality of frame images is interpolated based on a motion vector or the like of the original image. It is a method to generate in. In this case, when recording the other frame image, only the information regarding the difference and the motion vector from the plurality of frame images is recorded, and at the time of reproduction, it is referred to and predicted from the plurality of frame images. Then, it becomes possible to reproduce the other frame image. As a result, the image can be compressed and recorded.

Here, in the MPEG system, a unit called GOP (Group Of Picture) is used as a minimum unit that can be independently reproduced independently without referring to other images. FIG. 10 shows an example of a plurality of frame images forming this one GOP. In FIG. 10, one GOP is composed of 12 frame images. Among them, the frame image indicated by the code “I” is an I picture (Intra-
Coded picture: An intra-coded image), which is a frame image that can reproduce a complete frame image only with its own image. Further, the frame image indicated by the code “P” is a P picture (Predictive-coded pictur).
e: forward predictive coded image), which is a predictive image generated by decoding the difference from the predictive image that is compensated and reproduced based on the already decoded I picture or other P picture. Further, the frame image indicated by the code “B” is
B picture (Bidirectionally predictive-coded pictu
re: bidirectional predictive coded image), which is reproduced not only by using an already decoded I picture or P picture but also by using a temporally future I picture or P picture recorded on an optical disk or the like for prediction. Predicted image. Figure 10
In Fig. 3, arrows indicate prediction relationships (interpolation relationships) between pictures.

Here, there are two different generation modes for the data generation amount of one GOP. FIG. 11A shows
The GOP is recorded by controlling the compression rate and the like so that the data generation amount for each GOP 100 is always constant. If the amount of generated data is constant, the address of each GOP and the amount of data are in a proportional relationship, so that the address corresponding to the target time can be easily searched. On the other hand, FIG. 11B shows a GOP generated without performing control such that the amount of generated data is constant. At this time, the recorded GOPs 101, 102, and 103 have different amounts of data contained therein. Now, paying attention to the amount of data generated when the recorded video information is reproduced, in an image in which the original image moves rapidly, the correlation between each picture is small, so an efficient compression method using the correlation is sufficient. Therefore, the amount of generated data in one GOP increases. On the other hand, in the case of an image in which the movement of the original image is small, the correlation between each picture is large, so that many efficient compression methods using the correlation can be used, and the amount of data generated in one GOP can be increased. Less. According to the method shown in FIG. 11A, since each GOP always has a constant data amount regardless of the content of the motion component of the original image, the image quality of a moving image deteriorates, and For a small number of images, the amount of data will be wasted. Therefore, in order to homogenize the image quality and use the recording capacity of the optical disk efficiently, the method shown in FIG. 11B is preferable.

Next, when the video information compressed by the above method is recorded on the optical disc, as shown in FIG. 12, the audio information which has been subjected to a predetermined process such as compression is stored in a packet in a constant data amount. It is time-divided into so-called data units and multiplexed into one data stream. Then, the time-division multiplexed video information and audio information are recorded in units of the above packets.

As shown in FIG. 13, time axis information is added to each packet of the thus-recorded multiple stream data for convenience of synchronization management and access during reproduction. In the MPEG system, this time axis information is called PTS (Presentation Time Stamp). PTS
Is the reproduction time of the video information or the audio information for each packet in 1 / 90,000 seconds as a unit (that is, 1 second =
90,000 PTS). When the video information and the audio information are multiplexed and recorded, as shown in FIG. 13, the same PTS is described and recorded in the corresponding video packet and audio packet. Therefore, the playback device refers to this PTS. Then, by synchronizing the packet of the video information and the packet of the audio information in which the same PTS is recorded, the corresponding video information and the audio information can be reproduced in synchronization.

On the other hand, the PTS can also be used as elapsed time information of information during reproduction. That is, the PTS obtained from the optical disc is stored at the start of reproduction, and the PTS detected during the reproduction is recorded as the PT at the start of reproduction.
If the difference from S is calculated and divided by 90,000, the elapsed time in the PTS detected in the middle from the start of reproduction can be known.

Further, in the MPEG type optical disc, there is a method of using the GOP header described at the head of the above-mentioned GOP as a method of knowing the elapsed time in reproduction.

According to this method, the GOP header is added to each GOP header.
14 is a method of describing the elapsed time information (time code) from the beginning of reproduction corresponding to the above. The format of this time code is shown in FIG.

In FIG. 14, "time code hours"
"Time code minutes", "time code seconds" and "t
"ime code pictures" indicates "hour", "minute", "second" and "frame" in the time code,
The "marker bit" is fixed to "1".

The "drop frame flag" indicates whether or not two frames should be skipped in a predetermined amount. The outline of this drop frame is shown below. NTSC (Nation, which has become popular in the field of image processing)
In the case of the al Television System Committee) system, the frame frequency is 29.97 Hz and is not an integer.
The number of frames per second cannot be specified accurately. That is,
When the elapsed time is displayed in hours, minutes, seconds, and frames, there are mixed cases where the carry from frame to second is 29 frames and 30 frames. Therefore, VTR (Video Tape)
In the time code used for Recorder, etc., the playback time actually displayed is adjusted using drop frames. That is, the digits of the time code are "00" and "0" from the start of each minute except "0", "10", "20", "30", "40" and "50".
The frames corresponding to the two frame numbers "1" are skipped to the second, and the digits of the time code are "0", "10", "20", "30", "40" and In the case of "50", 30 from "00" to "29"
The frame advances to the second. By this processing, it is possible to accurately specify and display the time code according to the NTSC system. In FIG. 14, “dr
In the GOP in which the "op frame flag" is "1", the above-mentioned "00" and "01" frames are skipped.

The compressed multiplexed signal which has been subjected to the above-mentioned processing is recorded on the optical disc at a constant bit rate.
Here, at the time of reproduction, when displaying the elapsed time (reproduction time) accompanying the reproduced video signal or audio signal or when searching for the video at a specific elapsed time, It is necessary to describe elapsed time information for each fixed unit.

[0016]

However, regarding the description of the elapsed time information, the above two methods have the following problems.

First, in order to obtain the elapsed time based on the PTS, the PTS at the start of reproduction is stored as described above, and the PTS at the start of reproduction is subtracted from the PTS detected during the reproduction. The process of dividing the difference by 90,000 is required. Also, in the case of continuous reproduction, 90000 / (30 / 1.001) = 3003 (PT
From S), it is necessary to increase the number of frames by 3003 PTS. Here, (30 / 1.001) is
Indicates the exact frame frequency in NTSC system, 3
003PTS corresponds to the time required to reproduce one frame. Furthermore, in addition to this, it is necessary to perform processing by taking into account the above-described drop frame when moving from frame to second, and the necessity of these processing imposes a heavy load on the signal processing controller that constitutes the playback device. There is a problem.

On the other hand, when the elapsed time is calculated based on the time code described in the GOP header (see FIG. 14), the time code can be easily obtained for each GOP, but the obtained time code is reproduced. There are the following problems in deciding which frame of the generated video signal is to be associated.

Here, in order to explain this problem, the operation of the signal processing unit in the conventional reproducing apparatus will be described.
This will be described with reference to FIG.

As shown in FIG. 15, in the signal processing section S'in the conventional reproducing apparatus, the demodulated signal SL from the demodulating section (not shown) is first transmitted to the system decoder 110.
Entered in. At this time, a video signal (video signal) and an audio signal (audio signal) are multiplexed in the demodulated signal SL. Then, the system decoder 110 extracts various headers from the demodulated signal SL, and further, the video signal SV.
And audio signal SU. At this time, the video signal SV and the audio signal SU remain in the compressed state. The video signal SV and the audio signal SU are
The signals are individually output to the audio decoder 111 and the video decoder 112, respectively subjected to decompression processing, and output as an audio decompression signal SAE and a video decompression signal SVE. Here, in the video decoder 112, each GO
The GOP header HG is extracted from P. Then, the audio expansion signal SAE is output to the D / A converter 113, D / A converted, output as the output audio signal SAO, and output as audio by a predetermined amplifier (not shown) or the like. On the other hand, the video decompression signal SVE is output to the multiplexing unit 114, is multiplexed with the reproduction time code TT 'which will be described later, and is output to the D / A converter 115 as the video multiplex signal SVT and is D / A converted to the output video signal SVO. It is displayed on a monitor (not shown).

In parallel with these processes, the system decoder 110 extracts the PTS in the packet when extracting various headers and outputs it as the PTS signal ST to the signal processing controller 116. Then, the signal processing controller 116 causes the PTSs of the audio signal and the video signal extracted by the system decoder 110, respectively.
, The audio start signal SAS and the video start signal SVS are output in order to synchronize the audio signal and the video signal (see FIG. 13). In the audio decoder 111 and the video decoder 112, these audio start signal SAS and video start signal SVS
By outputting the audio expansion signal SAE and the video expansion signal SVE based on
And the video expansion signal SVE are synchronized. Further, the signal processing controller 116 outputs the reproduction time code TT 'included in the GOP header HG extracted by the video decoder 112 to the multiplexing unit 114 and multiplexes it with the video expansion signal SVE.

In the above operation, the reproduction time code T
In determining which frame included in the video expansion signal SVE is to be multiplexed, it is necessary to perform multiplexing based on the PTS that defines the reproduction time of both the audio signal and the video signal. However, the above PT
Since S is extracted by the system decoder 110, the reproduction time code TT 'can be accurately converted into the video expansion signal SV.
In order to multiplex to E, the signal processing controller 116 always stores the latest PTS, reads the PTS immediately before the GOP header HG, and outputs the playback time code TT 'included in the GOP header HG. It is necessary to output the playback time code TT 'based on the value,
There is a problem that processing this processing every time the GOP header HG is output imposes a heavy burden on the signal processing controller 116.

Further, in displaying the elapsed time, there are the following problems due to the content of the video signal or the audio signal.

In the prior art, the above-mentioned PTS or G
The time code of the OP header is given as a serial number from the beginning of the record information regardless of the content of the record information.

By the way, when the recording information to be recorded including the video signal and the audio signal is divided into a plurality of partial recording information according to the contents, the partial recording information is divided along the time axis as shown in FIG. 16 (a). There may be interactive relationships as shown in. In the example illustrated in FIG. 16A, first, the video and audio indicating “Problem 1” are output as a moving image or a still image. Then, if the user inputs an answer and the answer is correct, the video and audio indicating "correct answer 1" is output, and if the user inputs an answer that is not correct, "wrong 1" Is output. And
It is assumed that after outputting “correct answer 1” or “wrong 1”, the video and audio indicating the next “problem 2” are output. At this time, the "wrong 1" screen is displayed longer than the "correct answer 1" screen in order to show what is wrong. When recording a video signal and an audio signal corresponding to the recording information having such a configuration, a series of multiplexed compressed signals as shown in FIG. 16B is obtained, and "correct answer 1" is obtained according to the answer input by the user. Or, it will jump to "wrong 1". However, the partial record information 121 corresponding to “correct answer 1” and the partial record information 122 corresponding to “wrong 1”
Since the length of each is different, "Problem 2" is passed through "Correct Answer 1"
The elapsed time from the beginning of the recorded information at the beginning of the "problem 2" when reaching the "No. 2" and the elapsed time from the beginning of the recorded information at the beginning of the "problem 2" when reaching the "Problem 2" via the "Error 1" Since the elapsed time is different from the time, the elapsed time information (in the PTS or GOP header) is a serial number that is added to the multiplex compressed signal shown in FIG. 16B from the beginning of the recorded information as the elapsed time information. There is a problem that time code) cannot be used. Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to multiplex a time code on a video expansion signal without imposing an excessive burden on a signal processing controller that constitutes a reproducing apparatus. An object of the present invention is to provide an information recording device and an information reproducing device which are capable of displaying accurate elapsed time even if the information is interactive.

[0026]

In order to solve the above problems, the recording apparatus of the present invention is provided with a compressed video signal and an audio signal.
The recorded information divided into a plurality of partial recorded information
In an information recording device for recording on a data recording medium, a signal processing means for outputting a compression multiplexed signal which is a signal in which the audio signal and the compressed video signal are multiplexed, and a reproduction including time information corresponding to each of the partial record information. Reproduction additional information generating means for generating additional information, multiplex means for multiplexing the reproduction additional information signal on the compression multiplexed signal and outputting an information multiplex compressed signal, and recording the information multiplex compressed signal on the information recording medium. And a recording means for performing the recording.

In order to solve the above problems, the reproducing apparatus of the present invention includes a compressed video signal and an audio signal, and includes a plurality of units.
An information reproducing apparatus for reproducing an information recording medium on which minute recording information and reproduction additional information including time information corresponding to the partial recording information are recorded , comprising: a reading unit for reading information from the information recording medium; The control means extracts the time information and displays the time based on the time information.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the following embodiments apply the present invention to an information recording apparatus for recording information on an optical disc as an information recording medium and an information reproducing apparatus for reproducing the recorded information from the optical disc on which the recorded information is recorded by the information recording apparatus. The case where it is applied will be described.

(I) Information Recording Device First, the configuration of the information recording device according to the embodiment will be described with reference to FIG. As shown in FIG. 1, an information recording apparatus S1 according to an embodiment includes a VTR 1 for temporarily recording record information such as audio information and video information to be recorded, and partial record information for each content type of the record information. Is a content signal pre-input based on the cue sheet ST in which the start time for each partial record information in the record information is recorded together with the content type corresponding to each partial record information. After the A / D conversion of the audio information and the video information output from the memory 2 and the memory 2 that stores the content signal including the start time of the partial recording information corresponding to each type of content and each content type, each GOP is performed by the MPEG method. The recording information is compressed, and the audio information and the video information are time-axis-multiplexed on a packet basis and output as a compressed multiplexed signal SR, and the recording information output from the VTR 1 Corresponding to the time code TT and the content signal S output from the memory 2
Based on I, a position signal SP indicating the start position in the recorded information of each GOP is output, and the time code T
Based on T and the content signal SI output from the memory 2,
The reproduction time when the partial record information is reproduced for each partial record information and the partial record information start address in the record information of each partial record information are detected, and the content information is generated together with the corresponding content type. A signal processing unit 3 that outputs SAC, a hard disk device 4 that temporarily stores the compressed multiplex signal SR, and a flexible disk (FD) that temporarily records the content information signal SAC and the position signal SP.
The device 5 and the entire information recording device S1 are controlled, and each partial recording is performed based on the compressed multiplexed signal SR read from the hard disk device 4 and the content information signal SAC and position signal SP read from the FD device 5. Structure additional information including the reproduction time of the information and the start address in the recorded information, and reproduction additional information including the elapsed time at the time of reproduction in each partial record information and the PTS of the video information reproduced at the elapsed time are generated. The additional information signal SA is formed by forming additional information from the additional structure information and the additional reproduction information, and the additional structure signal is time-separated from the compression multiplexed signal SR and recorded on the optical disc, and the additional reproduction information is recorded. A controller 6 which outputs an information selection signal SC for time-axis multiplexing at the head of each GOP in the compressed multiplexed signal SR, and information selection Based on the signal SC, the structure additional information in the additional information signal SA is time-separated from the compression multiplexed signal SR and added to the compression multiplexed signal SR, and the reproduction additional information in the additional information signal SA is added in the compression multiplexed signal SR. A multiplexer 7 as an additional multiplexing means (multiplexing means) for time-axis-multiplexing at the head of each GOP and outputting an information-added multiplex compression signal SAP, and for the information-added compression multiplex signal SAP, for example, a Reed-Solomon code or the like The error correction code (ECC) is added and the modulator 8 which performs modulation such as 8-15 modulation to generate the disc recording signal SM, and the master (cutout type) for manufacturing the disc recording signal SM from the optical disc. And a mastering device 9 as a recording means for recording on the stamper disk DKS.

Here, the signal processing unit 3 in the above configuration
Function as the first signal processing means, the second signal processing means and the third signal processing means, and the controller 6 functions as the structure additional information generating means, the reproduction additional information generating means, the additional multiplexing means and the multiplexing means.

Next, the operation of the information recording device S1 will be described.

The record information (audio information and video information) temporarily recorded in the VTR 1 is A in the signal processing unit 3.
After D / D conversion, it is compressed by MPEG method,
The signals are time-axis multiplexed into a compressed multiplexed signal SR, which is temporarily stored in the hard disk device 4.

In parallel with this, in the signal processing unit 3, based on the content signal SI including the content type and the start time for each partial record information input based on the description on the cue sheet ST and stored in the memory 2, A position signal SP indicating the start position in the recorded information of each GOP is output by referring to the time code TT input from the VTR 1, and the reproduction time and the reproduction time when the partial recorded information of each partial recorded information is reproduced. The partial recording information start address in the recording information of each partial recording information is detected, it is made content information together with the corresponding content type, and the corresponding content information signal SAC is output and temporarily stored in the FD device 5 together with the position signal SP. To be done. The above processing is executed for all the recorded information.

When the above processing is completed for all the recorded information, the controller 6 reads the compression multiple signal SR from the hard disk device 4 and the content information signal SAC and the position signal SP from the FD device 5, thereby adding the structure additional information and the reproduction. The additional information is generated and used as the additional information, and the additional information signal SA corresponding to the additional information is output. The contents of the structure additional information and the reproduction additional information will be described later.

Thereafter, the compressed multiplexed signal SR is multiplexed with the additional information signal SA. At this time, the structure-added information signal corresponding to the structure-added information is time-separated from the compressed multiplexed signal SR, and is recorded separately from the compressed multiplexed signal SR in the innermost peripheral portion (lead-in area) of the stamper disk DKS. Is added to the compression multiplexed signal SR. On the other hand, the reproduction additional information signal corresponding to the reproduction additional information is time-axis-multiplexed at the head of each GOP in the compressed multiplexed signal SR into a packet different from the packet containing the video information and audio information included in the GOP. In this way, the compression multiplexed signal SR is multiplexed (added) with the additional information signal SA to generate the information added multiplexed compressed signal SAP. Then, the information-added multiplexed compressed signal SAP is added with an error correction code (ECC) such as Reed-Solomon code by the modulator 8 and modulated such as 8-15 modulation, and the disc recording signal modulated by the mastering device 9 is obtained. SM is recorded on the stamper disk DKS. And this stamper disk DK
An optical disk as a replica disk that is generally commercially available is manufactured by using a replication device (not shown) using S.

Next, the structure additional information and the reproduction additional information generated in the controller 6 will be described with reference to FIGS. 2 to 5.

First, the structure addition information will be described with reference to FIG.

As shown in FIG. 2A, the structure additional information I
J is reproduction time data IJT in which each total reproduction time of each partial record information (see FIG. 16) is described, and start address data in which a start address in each record information of each partial record information is described. The structure additional information signal, which is composed of IJS and corresponds to this structure additional information IJ, is time-separated from the compressed multiplexed signal SR, as described above, and is stored in the innermost part of the stamper disk DKS as shown in FIG. 2B. It is recorded in the structure additional information area at the periphery.

Next, the reproduction additional information will be described with reference to FIGS.

First, the structure of the reproduction additional information will be described with reference to FIG.

As described above, the reproduction additional information SJ is stored in a packet (the stream ID of the packet is private stream 2 in the MPEG system) different from the video signal and the audio signal in the compressed multiplexed signal SR, Its structure is, as shown in Fig. 3 (a), paket start code pre
fix data SJP, stream id data SJS, PES
packet length data SJL and PTS of applied video
It is composed of data SJT and CELTC data SJC. Here, paket start code prefix data SJ
The 6-byte data of P, stream id data SJS, and PES packet length data SJL is a private stream 2 packet header in which the contents to be described by the MPEG system are fixed. Then, the data of the other part is defined so that the user can freely use it, and in this embodiment, the PTS of applied video data S is set.
JT (hereinafter referred to as PTS data SJT) and CELTC
Describe the data SJC. Here, PTS data SJT
Is an image to be played at the elapsed time described in the CELTC data SJC (the elapsed time in each partial record information, which is reset to “0” at the beginning of the partial record information). The PTS of information is described. In addition, as described above, the CELTC data SJC describes the elapsed time in each partial record information and the elapsed time that is reset to “0” at the head of the partial record information. Here, the structure of the CELTC data SJC will be described in more detail as shown in FIG. That is, for each of the hour, minute, second, and frame data, the tens digit and the ones digit are separated from each other, and 4 bits are allocated to each of them, and the total is 32 bits.

Next, the structure of the data stream when the reproduction additional information SJ is multiplexed on the compression multiplexed signal SR will be described in detail with reference to FIGS. 4 and 5.

As described in the prior art, when the compressed video signal PV is generated by compressing the video information, the length (data amount) of each GOP is usually as shown in FIG. It is variable depending on the data amount of the picture included in each. Then, as shown in FIG. 4B, one GOP includes a plurality of I pictures, B pictures, and the like.
The data amount of each picture is also different. Here, when the compressed video signal PV is time-multiplexed with the audio signal, as described above, the compressed video signal PV is divided into packets, which are a multiplexing unit of a constant data amount. Figure 4
It shows in (c). In FIG. 4C, the dotted line in the GOP indicates the boundary of each picture. A packet header PH is added to each packet P, and when one picture starts in one packet, the PTS of the picture corresponding to the packet header PH can be described. In the case of FIG. 4C, the first packet P
The PTSs corresponding to the third packet P and the third packet P can be described, but in the present embodiment, the PTS is described only in the first packet P of each GOP.

The portion indicated by the code SF in FIG. 4C shows the portion to which data has been added by stuffing. Here, the stuffing is a packet P.
In order to adjust the amount of data within
Indicates a hexadecimal number. ) ”Is added to data that is irrelevant to the actual video data. In the example shown in FIG. 4C, the stuffing is performed on the portion of the G that is less than the amount of data in each GOP.

The video signal which has been subjected to the above processing is multiplexed with the audio signal to form a compressed multiplexed signal SR.

Although the processing described so far is executed in the signal processing unit 3, the GO processing is performed by these processings.
The head of P and the head of packet P always match, and the packet P corresponding to the head of GOP is
As shown in (a), the PTS of the first picture in the GOP (indicated by the symbols PTS1 and PTS2 in FIG. 5A) is described.

Here, the frame frequency is set to 29.97 (3
0 / 1.001) Hz, P in FIG.
The difference between TSn and PTSn + 1 is 90,000 / (30 / if the number of frames forming a GOP is 15 frames.
1.001) × 15 = 45045, and each PTS in FIG. 5A corresponds to the display time of the head picture in the corresponding GOP at the time of reproduction.

On the other hand, for audio information, for example, the compression unit is an audio unit, and the same processing as above is performed for each audio unit. Here, in this embodiment, since there is no concept of GOP in the voice information, when the voice unit starts in the packet P, P is written in the packet header PH of the voice unit.
The TS shall be described.

As shown in FIG. 5B, the reproduction additional information SJ of this embodiment is described by providing an additional packet PD different from the packet containing the video information and the audio information for each GOP ( PTS described in the GOP to which the additional packet PD belongs (PTS of the first picture in the GOP) is described in the packet header PH.

According to the information recording apparatus S1 described above,
Since reproduction additional information SJ including CELTC data SJC for each partial recording information and PTS data SJT corresponding to the CELTC data SJC is recorded together with the recording information, elapsed time information for the demodulated and expanded video information at the time of reproduction. It becomes easy to multiplex. Also, CELTC data SJC
However, since it is reset at the beginning of each partial record information, even when reproducing in the order different from the recording order of the partial record information, the CELTC data SJC in each partial record information is reproduced.
By adding, it is possible to display correct elapsed time information corresponding to the entire reproduced recorded information.

Further, since the additional structure information IJ including the additional reproduction information SJ, the reproduction time for each partial record information and the partial record information start address in the record information is recorded together with the record information, the reproduction of the record information is started at the time of reproduction. When a desired reproduction position with the position as the starting point is input, it is possible to detect the partial record information including the reproduction position,
The recorded information corresponding to the reproduction position can be quickly reproduced with the PTS as a reference.

Furthermore, at the time of reproduction, when a desired reproduction position starting from the starting position of the partial recording information is input, the partial recording information including the reproduction position can be detected and the PTS can be used as a reference. As a result, it is possible to quickly reproduce the record information corresponding to the reproduction position.

(II) Information reproducing apparatus As shown in FIG. 6, the information reproducing apparatus S2 according to the embodiment is
From the optical disc DK recorded as the disc recording signal SM, the information recording device S1 multiplexes (adds) the additional information signal SA including the structure additional information IJ and the reproduction additional information SJ to the compressed multiplex signal SR, and the disc recording signal is recorded. An optical pickup 10 as a detecting means for detecting SM and outputting it as a detection signal SPU, and a binarizer for binarizing the read detection signal SPU by a constant threshold value and outputting it as a binary signal SB. 11 and the binary signal SB is demodulated and error-corrected to obtain the demodulated signal S
A demodulator 12 as an extraction means for outputting L as a structure signal for extracting the structure additional information signal SIJ corresponding to the structure additional information IJ from the binary signal SB, and M for the demodulated signal SL.
A signal processing unit 13 that performs decompression processing by the PEG method, performs D / A conversion and outputs as an output video signal SAO and an output music signal SVO, and detects a clock component from the binary signal SB and outputs it as a detection clock signal CLKP. The clock component detector 14, the detected clock signal CLKP, and a reference clock signal CLK from an oscillator 17, which will be described later, are phase-compared to form a comparison signal, and a high frequency component is removed from the comparison signal to control the rotation speed of the spindle motor 16. Under the rotation speed control based on the rotation speed control signal SSP and the phase comparator 15 including an LPF (Low Pass Filter) output as the signal SSP,
The spindle motor 16 for rotating the optical disk DK, the oscillator 17 for outputting the reference clock signal CLK for timing synchronization between the respective members constituting the information reproducing apparatus S2, and the control of the entire information reproducing apparatus S2 are performed. Structure additional information IJ corresponding to the structure additional information signal SIJ
And a designation signal SZ for designating a reproduction position to be reproduced inputted from the remote controller 18 and a demodulator 1
Based on the address signal SAD corresponding to the address of the recorded information which is currently being reproduced, the designated signal SZ
The spindle control signal SE and the slider control signal SX for reproducing the partial record information corresponding to the reproduction position designated by are output, and the total elapsed time signal SAT indicating the total elapsed time in reproducing the record information is displayed. And a controller 20 for outputting to the display unit 19 as. Further, the controller 20 includes the signal processing unit 13
Control signal SCT for controlling the
3 and the control signal SCT sent from the signal processing unit 13 to the controller 20 includes the reproduction additional information signal SSJ corresponding to the reproduction additional information SJ extracted by the signal processing unit 13. ing. The optical pickup 10 is moved on the optical disk DK by the operation of a slider (not shown) based on the slider control signal SX, and reproduces the record information to be reproduced.

Here, the controller 20 functions as a total elapsed time calculating means, a reproduced partial recording information detecting means, a controlling means, and a partial recording information start position detecting means.

Further, as shown in FIG. 7, the signal processing unit 13
Extracts various headers from the demodulated signal SL from the demodulator 12 and also outputs the video signal SV and audio signal SU.
And a system decoder 21 for separating the audio signal SU, an audio decoder 22 for expanding the audio signal SU and outputting an audio expanded signal SAE, and an audio expanded signal SAE for D /
A D / A converter 24 for A-converting and outputting the output audio signal SAO, and a video expansion signal S for expanding the video signal SV.
The video decoder 23 that outputs VE and the video expansion signal S
A time division multiplex signal STCJ, which will be described later, is multiplexed on VE, and a multiplexing unit 25 for outputting a video multiplex signal SVT and a D for D / A converting the video multiplex signal SVT and outputting an output video signal SVO.
/ A converter 26 and a signal processing controller 2 described later
Based on the reproduction time code TTP and the time start signal STS from 7 and the time code buffer 28 which outputs the time code multiplexed signal STCJ, and the reference clock signal CLK from the oscillator 17, while controlling the entire signal processing unit 13, A signal processing controller 27 as an elapsed time information multiplexing means for exchanging a control signal SCT including a reproduction additional information signal SSJ with the controller 20.
It consists of and.

Here, regarding the output of the output video signal SVO and the output audio signal SAO by the signal processing unit 13 based on the control of the control signal SCT, the partial record information is recorded in order to reproduce the partial record information to be reproduced. While the optical pickup 10 is being moved to the position by the slider control signal SX, the output video signal SVO is the image immediately before the transfer as a still image, and the output audio signal SAO.
The output of will be interrupted.

Further, in the recording by the information recording apparatus S1, since the disk recording signal SM is modulated so that the clock can be self-extracted at the time of reproduction, the clock component detector 14 extracts the extracted clock signal CLKP. Can be detected.

Next, regarding the operation of the information reproducing apparatus S2,
A reproduction operation using the structure additional information IJ and the reproduction additional information SJ will be mainly described with reference to FIGS. 6 to 9.

First, the reproduction operation using the reproduction additional information SJ will be described together with the operation of the signal processing unit 13.

As shown in FIG. 7, in the signal processing unit 13, the demodulated signal SL from the demodulator 12 is input to the system decoder 21. At this time, the demodulated signal SL has a video signal (video signal) and an audio signal (audio signal) multiplexed. Then, the system decoder 21 extracts various headers from the demodulated signal SL, and further, the video signal S
Separated into V and audio signal SU. At this time, the video signal SV and the audio signal SU remain in the compressed state. This video signal SV and audio signal SU
Are separately output to the audio decoder 22 and the video decoder 23, respectively subjected to expansion processing and output as an audio expansion signal SAE and a video expansion signal SVE. The audio expansion signal SAE is D / A
It is output to the converter 24, D / A converted, output as an output audio signal SAO, and output as audio by a predetermined amplifier or the like not shown. On the other hand, the video decompression signal SVE is output to the multiplexing unit 25, and the time code multiplexing signal S described later is obtained.
The signal is multiplexed with TCJ and output as a video multiplexed signal SVT to the D / A converter 26 for D / A conversion, and displayed as an output video signal SVO on a monitor or the like not shown.

In parallel with these processes, the system decoder 21 extracts the PTS in the packet header contained in the demodulated signal SL when extracting various headers, and outputs the PTS.
The signal ST is output to the signal processing controller 27.
Further, in parallel with this, the system decoder 21 extracts the reproduction additional information SJ from the additional packet PD, and the CELTC data SJC and the CELTC data SJC included therein.
To the signal processing controller 27 as the elapsed time signal STT. Here, since only one reproduction additional information SJ is included in each GOP as described above, the elapsed time information corresponding to the frames other than the frame corresponding to the picture reproduced at the beginning of each GOP is the signal. It is calculated in increments for each frame in the processing controller 27. The elapsed time information thus generated is output to the time code buffer 28 as a reproduction time code TTP and temporarily stored. And
Based on the PTS signal ST, the signal processing controller 27 refers to the PTS of the audio signal SU and the video signal SV and the PTS of the reproduction additional information SJ included in the elapsed time signal STT to refer to the audio signal SU and the video signal having the same PTS. In order to output SV and playback time code TTP at the same time, audio start signal SAS, video start signal SVS and time start signal STS are output to audio decoder 22, video decoder 23 and time code buffer 28, respectively. According to the video start signal SVS and the time start signal STS, the video decoder 23 outputs the video expansion signal SVE, and the time code buffer 28 outputs the video expansion signal SVE.
Time code multiplexed signal S corresponding to the video signal included in
TCJ is output, and these are multiplexed by the multiplexing unit 25. At this time, since the corresponding video expansion signal SVE and time code multiplex signal STCJ are simultaneously output and multiplexed with PTS as a reference, the correct time code can be multiplexed with the video expansion signal SVE.

Here, the elapsed time information (CE which is included in the reproduction additional information SJ extracted by the system decoder 21
Since the LTC data SJC) is reset at the beginning of each partial record information, the time code multiplexed in the video expansion signal SVE is also set to "0" at the beginning of each partial record information. Further, the signal processing controller 27 is internally provided with a time code counter (not shown), and this counter has elapsed time information (CELTC data S in the reproduction additional information).
JC) and is incremented each time the video frame corresponding to the picture changes.

On the other hand, the reproduction additional information SJ is output from the signal processing controller 27 to the controller 20 as a control signal SCT.

As a result of the above processing, regarding the result of adding the elapsed time information for each partial record information, the result of adding the elapsed time information to the interactive record information as shown in FIG. 16 is shown in FIG. Show. As shown in FIG. 8A, in each of the partial record information 120 to 123, each partial record information is continuous within the partial record information and is reset at the head of each partial record information to be “0”. Elapsed time information (0, 1, 2, ...) Is added.

Therefore, when the elapsed time from the beginning of the recorded information is displayed for the interactive recorded information shown in FIG. 8A, for example, as shown in FIG. If the answer input next to the partial record information 120 indicating “corresponding to correct answer 1” corresponds to the elapsed time in the partial record information 121 indicating “correct answer 1”, the partial record information indicating “problem 1” A value obtained by adding the last elapsed time of 120 is the elapsed time in the partial record information 121 indicating the “correct answer 1”. Similarly, the partial record information 12 indicating "problem 2" next to the partial record information 121 indicating "correct answer 1" is displayed.
3, the partial record information 123 indicating “problem 2” at the last elapsed time of the partial record information 121 indicating “correct answer 1”.
The elapsed time in the partial record information 123 indicating the “problem 2” is added. Figure 8 (c)
Similarly, in the case shown in, the partial record information 1 indicating "problem 1"
The elapsed time is added in the order of 20, the partial record information 122 indicating “Error 1”, and the partial record information 123 indicating “Problem 2”. This adding operation is performed by the controller 20 based on the reproduction additional information SJ input to the controller 20 as the control signal SCT, and is displayed on the display unit 19 as the total elapsed time signal SAT indicating the total elapsed time when the recorded information is reproduced. The correct total elapsed time is displayed regardless of the reproduction route of the recorded information.

In this embodiment, the time record multiple signal STCJ including the elapsed time information is multiplexed with the video expansion signal SVE. However, as described above, the elapsed time for each partial record information is added. It is also possible to obtain the total elapsed time information, multiplex this information with the video expansion signal SVE, and display the total elapsed time together with the display of the output video signal SAD.

Next, the reproducing operation using the structure addition information IJ will be described with reference to FIG.

As described above, the structure addition information IJ is extracted by the demodulation unit 12 and output to the controller 20 as the structure addition information signal SIJ and stored therein.

This structure additional information IJ is shown in FIG. 9B in the case of non-interactive recording information as shown in FIG. 9A.
It is described as shown in. Here, for example, in FIG.
Designation to access the portion of time "x" (the time "x" is in the middle of Chapter 3 in FIG. 9A) from the start of reproduction of the recorded information shown in (a). When the signal SZ is input from the remote controller 18, the controller 2
0 performs the following operation.

(1) Based on the reproduction time data IJT included in the structure additional information SJ (FIG. 9B), the recording information corresponding to the time "x" from (m + n) <x <(m + n + k) Is included in Chapter 3.

(2) Based on the start address data IJS contained in the structure additional information SJ (FIG. 9B), the third
Get chapter start address "C".

(3) a = x-m-n is calculated to detect the position where the elapsed time information (CELTC data SJC) in the reproduction additional information SJ of the partial record information corresponding to Chapter 3 is "a". ,
A slider control signal SX is output to move the optical pickup 10 to a position on the optical disk DK corresponding to that position.

(4) Playback is started from the position of the elapsed time "a" in Chapter 3.

Structure additional information I when the above is not interactive
This is a reproducing operation using J.

Next, the reproducing operation using the structure addition information IJ in the case of the interactive recording information as shown in FIG. 8 will be described.

In the case of the interactive recording information as shown in FIG. 8, the structure addition information IJ is described as shown in FIG. 9 (c). Here, for example, when the remote controller 18 inputs the designation signal SZ indicating that the time "y" has elapsed from the start of reproduction of "problem 2" of the recorded information shown in FIG. 8, the controller 20 causes the following: It operates like this.

(1) The start address "d" of Problem 2 is acquired based on the start address data IJS included in the structure additional information SJ (FIG. 9C).

(2) Elapsed time information (CELTC data SJ in reproduction additional information SJ of partial record information corresponding to problem 2)
C) detects the position of "d" and outputs the slider control signal SX to move the optical pickup 10 to the position on the optical disk DK corresponding to the position.

(3) Playback is started from the position of the elapsed time "d" in Problem 2.

The above is the reproduction operation using the structure addition information IJ in the case of interactive recording information. As described above, according to the reproduction operation of the information reproducing apparatus S2 using the reproduction additional information SJ and the structure additional information IJ, the reproduction additional information SJ
Since the elapsed time information (CELTC data SJC) contained in is multiplexed with the video signal expanded based on the corresponding PTS, the video signal and the elapsed time information can be easily multiplexed, and the information reproducing apparatus S2 The elapsed time information can be multiplexed with the demodulated and expanded video information without increasing the load on the signal processing controller 27 in FIG.

Further, since the elapsed time information is reset at the head of each partial record information, and added in the reproduction order of the partial record information and displayed as the total elapsed time, the recording order and the reproduction order for each partial record information. The correct total elapsed time corresponding to the entire reproduced recorded information can be displayed even when the difference is different.

Therefore, the correct total elapsed time can be displayed even when the interactive recording information is reproduced.

Further, since the reproduction additional information SJ and the structure additional information IJ are detected together with the record information, when a desired reproduction position with the reproduction start position of the record information as a starting point is input, a part including the reproduction position is inputted. The record information can be detected, and the record information corresponding to the reproduction position can be rapidly reproduced with the PTS as a reference. Furthermore, even when the recording order and the reproduction order are different for each partial record information in the reproduction of the record information, when the desired reproduction position whose starting point is the start position of the partial record information is input, the reproduction position is changed. It is possible to detect the partial record information including the record information, and it is possible to quickly reproduce the record information corresponding to the reproduction position based on the PTS. (III) Modified Embodiment In the above embodiments, the structural additional information IJ is recorded in the innermost peripheral portion of the optical disc, but the present invention is not limited to this, and a plurality of recorded information can be recorded on one optical disc. In some cases, they are for example ISO (Internatio
nal Organization for Standarization) 9660, and the structure additional information IJ may be described at the beginning of each file.

Further, the remote controller 18 may be a keyboard or the like.

[0085]

As described above, according to the recording apparatus of the present invention, since the time information is recorded together with the record information for each partial record information, it becomes easy to multiplex the time information with the demodulated video information. .

According to the reproducing apparatus of the present invention, since the time is displayed based on the time information, it is possible to display the correct time corresponding to the entire reproduced record information. Therefore, the correct time can be displayed even when the interactive recorded information is reproduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration block diagram of an information recording apparatus according to an embodiment.

2A and 2B are diagrams illustrating structure addition information, FIG. 2A is a diagram showing the structure, and FIG. 2B is a diagram showing recording positions on a stamper disk.

3A and 3B are diagrams for explaining reproduction additional information, FIG. 3A is a diagram showing the structure thereof, and FIG. 3B is a diagram showing CELTC data SJ.
It is a figure which shows the structure of C.

FIG. 4 is a diagram showing a relationship between GOP and packets,
(A) is a figure which shows GOP in a compressed video signal, (b) is a figure which shows the picture which comprises one GOP, (c) is a figure which shows the state which divided one GOP into packets. Is.

FIG. 5 is a diagram for explaining a PTS addition position, (a)
FIG. 4 is a diagram showing a relationship between GOP and PTS, and FIG. 7B is a diagram showing a relationship between information-added multiplex compression signal and PTS.

FIG. 6 is a schematic block diagram of an information reproducing apparatus according to an embodiment.

FIG. 7 is a schematic configuration block diagram of a signal processing unit.

FIG. 8 is a diagram showing formation of a time code in interactive recording information, (a) is a diagram showing elapsed time information for each partial recording information, and (b) is an input answer “correct answer 1”.
It is a figure which shows the time code of the whole record information in the case of responding to, and (c) is a figure which shows the time code of the whole record information in case the input answer corresponds to "mistake 1".

9A and 9B are diagrams illustrating access using structure additional information, FIG. 9A is a diagram showing elapsed time information for each partial record information in the case of non-interactive record information, and FIG. )
FIG. 9 is a diagram showing an example of a structure of structure additional information corresponding to the record information shown in FIG. 8, and FIG. 9C is a diagram showing an example of a structure of structure additional information in the case of the interactive record information shown in FIG. 8. .

FIG. 10 is a diagram showing frame images forming a GOP.

FIG. 11 is a diagram showing a data generation amount of GOP,
(A) is a figure which shows the case where the data generation amount of each GOP is constant, and (b) is a figure which shows the case where the data generation amount of each GOP is variable.

FIG. 12 is a diagram illustrating formation of multiple streams.

FIG. 13 is a diagram illustrating synchronization between a video stream and an audio stream.

FIG. 14 is a diagram showing a structure of a time code in a GOP header.

FIG. 15 is a schematic configuration block diagram of a signal processing unit of a conventional technique.

FIG. 16 is a diagram for explaining reproduction and recording of interactive recording / recording information, and FIG. 16 (a) is a diagram for explaining a reproduction state;
FIG. 7B is a diagram illustrating a recording state.

[Explanation of symbols] 1 ... VTR 2 ... memory 3 ... Signal processing unit 4 ... Hard disk drive 5: FD device 6, 20 ... Controller 7 ... Multiplexer 8 ... Modulator 9 ... Mastering device 10 ... Optical pickup 11 ... Binarizer 12 ... Demodulator 13, S '... Signal processing unit 14 ... Clock component extractor 15 ... Phase comparator 16: Spindle motor 17 ... Oscillator 18 ... Remote control 19 ... Display 21, 110 ... System decoder 22, 111 ... Audio decoder 23, 112 ... Video decoder 24, 26, 113, 115 ... D / A converter 25, 114 ... Multiplex part 27, 116 ... Signal processing controller 28: Time code buffer 100, 101, 102, 103 ... GOP 120, 121, 122, 123 ... Partial record information DKS: Stamper disc DK: Optical disc S1 ... Information recording device S2 ・ ・ ・ Information playback device SI ・ ・ ・ Content signal SP ・ ・ ・ Position signal SAC: Content information signal SR: Compressed multiplexed signal SA ・ ・ ・ Additional information signal SC ・ ・ ・ Information selection signal SAP: Information-added multiple compressed signal SM: Disc recording signal SPU ・ ・ ・ Detection signal SX ・ ・ ・ Slider control signal SE ・ ・ ・ Spindle control signal SSP: Rotation speed control signal SB: Binary signal SAD: Address signal SIJ ・ ・ ・ Structure additional information signal SZ: Designation signal SAT: Total elapsed time signal SL ・ ・ ・ Demodulated signal SAO: Output video signal SVO: Output voice signal SCT: control signal CLK: Reference clock signal CLKP: Detection clock signal TT: Time code TTP, TT '... Playback time code STT ・ ・ ・ Elapsed time signal ST ・ ・ ・ PTS signal SU ・ ・ ・ Audio signal SV ・ ・ ・ Video signal SAS: audio start signal SVS ・ ・ ・ Video start signal STS ・ ・ ・ Time start signal STCJ ・ ・ ・ Time code multiplexed signal SVE ・ ・ ・ Video expansion signal SAE ・ ・ ・ Audio expansion signal SVT ・ ・ ・ Video multiplexed signal IJ ... Additional structure information IJT: Playback time data IJS ... Start address data SJ: Additional reproduction information SJP ・ ・ ・ paket start code prefix data SJS ・ ・ ・ stream id data SJL ・ ・ ・ PES packet length data SJT ・ ・ ・ PTS of applied video data SJT SJC ・ ・ ・ CELTC data PV: Compressed video signal P ... Packet PH: Packet header SF ... Stuffing area PD: Additional packet PV: Video packet PA: Voice packet HG: GOP header

Claims (43)

[Claims] 1. A recording information divided into partial recording information, a video signal forming the recording information is compressed into a compressed video signal, and an audio signal forming the recording information is recorded on an information recording medium. In the information recording device, a signal processing means for outputting a compression multiplexed signal which is a signal obtained by multiplexing the audio signal and the compressed video signal, and reproduction additional information including time information corresponding to each of the partial record information are generated. Reproducing additional information generating means, multiplexing means for multiplexing the reproducing additional information signal on the compressed multiplexed signal and outputting an information multiplexed compressed signal, and recording means for recording the information multiplexed compressed signal on the information recording medium, An information recording device comprising: 2. The information recording apparatus according to claim 1, wherein the time information is recorded with the tens digit and the ones digit separated for each of hour, minute, and second data. 3. The information recording apparatus according to claim 2, wherein a predetermined number of bits is assigned to the tens digit and the ones digit. 4. The information recording apparatus according to claim 1, wherein the time information indicates an elapsed time of the partial record information. 5. The audio signal and the compressed video signal are divided into preset multiplex units and recorded on the information recording medium, respectively. Information recording device described. 6. The reproduction additional information signal is further multiplexed with the compression multiplexed signal as the multiplex unit different from the multiplex unit including the audio signal or the compressed video signal. 5. The information recording device according to item 5. 7. The information recording apparatus according to claim 1, further comprising means for adding an error correction code and predetermined modulation to the information multiplexed compressed signal. 8. An information recording medium recorded by the information recording device according to any one of claims 1 to 7. 9. The information recording apparatus according to claim 1, wherein the information recording medium is a stamper disk. 10. The information recording apparatus according to claim 9, further comprising means for manufacturing a replica disk using the stamper disk. 11. Information recording for recording a compressed video signal and an audio signal forming the recording information on an information recording medium by compressing a video signal forming the recording information together with the recording information divided into partial recording information. In the method, a step of outputting a compression multiplexed signal which is a signal obtained by multiplexing the audio signal and the compressed video signal, a step of generating reproduction additional information including time information according to each of the partial record information, and the compression An information recording method comprising: a step of multiplexing the reproduction additional information signal on a multiplexed signal to output an information multiplexed compressed signal; and a step of recording the information multiplexed compressed signal on the information recording medium. . 12. The information recording method according to claim 11, wherein the time information is recorded with the tens digit and the ones digit separated respectively for hour, minute, and second data. 13. The predetermined number of bits are assigned to the tens digit and the ones digit.
Information recording method described in. 14. The information according to claim 11, wherein the time information indicates an elapsed time of the partial record information.
The information recording method described in any one of 1. 15. The audio signal and the compressed video signal are
The information recording method according to any one of claims 11 to 14, wherein the information recording medium is divided into preset multiplex units and recorded on the information recording medium. 16. The reproduction additional information signal is further multiplexed with the compression multiplexed signal as the multiplex unit different from the multiplex unit including the audio signal or the compressed video signal. 15. The information recording method described in 15. 17. The information recording method according to claim 11, further comprising a step of adding an error correction code and a predetermined modulation to the information multiplexed compressed signal. 18. An information recording medium recorded by the information recording method according to claim 11. 19. The information recording method according to claim 11, wherein the information recording medium is a stamper disk. 20. The information recording method according to claim 19, further comprising the step of manufacturing a replica disc using the stamper disc. 21. First signal processing means for outputting a compression multiplexed signal composed of an audio signal and a compressed video signal based on input recording information, and the compression multiplexed signal is divided into partial recording information, and the portion is recorded. Reproduction additional information generating means for outputting reproduction additional information including time information corresponding to recorded information; and multiplexing means for multiplexing the reproduction additional information signal with the compression multiplexed signal and outputting an information multiplex compressed signal. An information processing device characterized by the above. 22. The information processing apparatus according to claim 21, wherein the time information is recorded by separating the tens digit and the ones digit for the hour, minute, and second data, respectively. 23. The predetermined number of bits are assigned to the tens digit and the ones digit.
The information processing device according to 1. 24. The time information indicates an elapsed time of the partial record information.
2. The information processing device according to any one of 1. 25. The audio signal and the compressed video signal are
The information processing apparatus according to any one of claims 21 to 24, wherein the information processing apparatus is divided for each preset multiplex unit. 26. The reproduction additional information signal is further multiplexed with the compression multiplexed signal as the multiplex unit different from the multiplex unit including the audio signal or the compressed video signal. 25. The information processing device according to 25. 27. The information processing apparatus according to claim 21, further comprising means for adding an error correction code and predetermined modulation to the information multiplexed compressed signal. 28. A step of outputting a compression multiplex signal composed of an audio signal and a compressed video signal based on the input recording information, dividing the compression multiplex signal into partial recording information, and corresponding to the partial recording information The reproduction additional information including the time information described above, and the step of multiplexing the reproduction additional information signal with the compression multiplexed signal and outputting the information multiplexed compressed signal. . 29. The information processing method according to claim 11, wherein the time information is recorded with the tens digit and the ones digit separated for the hour, minute, and second data, respectively. 30. The predetermined number of bits are assigned to the tens digit and the ones digit.
Information processing method described in. 31. The time information indicates an elapsed time of the partial record information.
The information processing method described in any one of 1. 32. The audio signal and the compressed video signal are
The information processing method according to any one of claims 28 to 31, wherein the information processing method is divided into preset multiplex units. 33. The reproduction additional information signal is further multiplexed with the compression multiplexed signal as the multiplex unit different from the multiplex unit including the audio signal or the compressed video signal. 32. The information processing method described in 32. 34. The information processing method according to claim 28, further comprising means for adding an error correction code and predetermined modulation to the information multiplexed compressed signal. 35. An information reproducing apparatus for reproducing an information recording medium on which audio signals and compressed video signals divided into partial record information and additional reproduction information including time information corresponding to the partial record information are recorded. An information reproducing apparatus comprising: a reading unit that reads information from the information recording medium; and a control unit, wherein the control unit extracts the time information and displays time based on the time information. 36. The information reproducing apparatus according to claim 35, wherein the time information is recorded by separating the tens digit and the ones digit for hour, minute, and second data, respectively. 37. The predetermined number of bits are assigned to the tens digit and the ones digit.
The information reproducing apparatus described in. 38. The time information indicates an elapsed time of the partial record information.
The information reproducing apparatus described in any one of 1. 39. The information reproducing apparatus according to claim 35, further comprising display means for displaying time. 40. An information reproducing method for reproducing an information recording medium on which audio signals and compressed video signals divided into partial record information and additional reproduction information including time information corresponding to the partial record information are recorded. An information reproducing method comprising: a step of reading information from the information recording medium; a step of extracting the elapsed time information; and a step of displaying time based on the elapsed time information. 41. The information reproducing method according to claim 40, wherein the time information is recorded by separating the tens digit and the ones digit for the hour, minute, and second data, respectively. 42. The predetermined number of bits are assigned to the tens digit and the ones digit.
Information reproduction method described in. 43. The time information indicates an elapsed time of the partial record information.
The information reproducing method described in any one of 1.