JP4510254B2 - Recording apparatus and encoding apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording apparatus and an encoding apparatus, and more particularly to an apparatus for recording an audio video signal on a recording medium and an apparatus for encoding a video signal.
[0002]
[Prior art]
A reproduction-only DVD (Digital Video Disk) records encoded data obtained by subjecting the audio video signal to compression encoding processing as an audio video signal corresponding to a predetermined program or the like. Here, the audio video signal includes an audio signal and a video signal, and the DVD includes, as the encoded data, audio encoded data obtained by encoding the audio signal, and a video signal. Video encoded data obtained by the encoding process is recorded. Also, the audio encoded data and the video encoded data are packed into respective packs. In other words, these encoded data are classified with a predetermined data size (for example, 2048 bytes) as the first data unit.
[0003]
In the following, audio encoded data corresponding to the first data unit is referred to as an audio pack, and video encoded data corresponding to the first data unit is referred to as a video pack.
Each audio pack and each video pack are multiplexed and recorded on a DVD.
[0004]
The encoded data recorded on the DVD is divided for each second data unit including a plurality of the first data units, which is a unit for managing the encoded data. This second data unit is called a video object (VOB).
[0005]
For example, encoded data corresponding to one program (program) is composed of one or more VOBs. In the video standard related to DVDROM, a group of one or more VOBs is a video object set (VOBS). Called and recorded on a DVD as one title.
[0006]
In addition to the encoded data of each title (program), the DVD includes, as management information for each title (program), information indicating the recording position of the encoded data corresponding to the title in the recording area (recording position). Information), video attribute information and audio attribute information corresponding to the encoded data, and the like are recorded. However, such management information is recorded for each VOB as described above.
[0007]
The recording position information is various address information in the recording area of the DVD. For example, the start address and the end address of the area where the encoded data of VOBS corresponding to the title is recorded, and the search point set in advance by the user It is information such as an address indicating.
[0008]
The video attribute information is information relating to a compression encoding mode, a television system, an aspect ratio, a display mode, and the like.
Here, the compression encoding mode of the DVD includes a mode based on an encoding system corresponding to MPEG-1 and a mode based on an encoding system corresponding to MPEG-2, and the compression encoding mode information is: It shows which encoding method the encoded data of each VOB corresponds to.
[0009]
TV systems include NTSC system (525 lines / frame frequency 59.97 Hz) system and PAL system (625 lines / frame frequency 50 Hz) system. Indicates which method the encoded data of each VOB corresponds to.
[0010]
The aspect ratio is the ratio between the horizontal size of the image and the vertical size. Specifically, two ratios of 4: 3 and 16: 9 are used as the aspect ratio, and the aspect ratio information is The figure shows which aspect ratio the encoded data of each VOB corresponds to.
[0011]
Furthermore, the display mode is a mode related to a method for displaying an image based on a video signal obtained from encoded data, for example, a pan / scan display mode or a letterbox display mode, and the display mode information includes encoded data of each VOB. This is information indicating what display method should be used to display the video signal obtained from. The pan / scan display mode is a mode in which a wide image having an aspect ratio of 16: 9 is displayed on a standard screen having an aspect ratio of 4: 3, except for both left and right regions of the wide image. . In the letterbox display mode, a wide image having an aspect ratio of 16: 9 is displayed on a standard screen having an aspect ratio of 4: 3 by adding areas of a certain color to the upper and lower sides of the wide image. Mode.
[0012]
Incidentally, there is an MPEG encoding method as an international standard method for compressing and encoding a video signal (hereinafter also referred to as image data). This is an image data encoding process that encodes image data using intra-frame correlation of pixel values and encodes image data using inter-frame correlation of pixel values. The interframe coding process is adaptively switched. In this MPEG encoding method, encoding processing of image data is performed with encoded data corresponding to a plurality of consecutive frames as one unit. Here, an image composed of a plurality of continuous frames is called a group of pictures (GOP).
[0013]
Specifically, in this MPEG encoding method, intra-frame encoding processing is performed on image data of at least one frame among a plurality of frames constituting this GOP, and image data of the remaining frames is applied. In this case, inter-frame coding processing is performed.
[0014]
The inter-frame encoding process includes two processes, a forward inter-frame predictive encoding process and a bi-directional inter-frame predictive encoding process. A frame on which the forward interframe predictive encoding process is performed is called a P frame, and a frame on which the bidirectional interframe predictive encoding process is performed is called a B frame. The P frame image data is subjected to predictive coding processing with reference to image data of a frame (reference frame) located before the P frame. The image data of the B frame is subjected to predictive encoding processing with reference to the image data of two frames (reference frames) positioned adjacent to and adjacent to the B frame. Normally, in the encoding process of the P frame, an I frame adjacent to the P frame is used as a reference frame, and in the encoding process of the B frame, an I frame and a P frame, or a P frame adjacent to the P frame are used. Used as a reference frame.
[0015]
FIG. 17 is a diagram for explaining a configuration example of the GOP. A plurality of continuous frames F (k−5) to F (k + 12) and encoded data D (k−) corresponding to each frame are illustrated. 5) to D (k + 12) are shown in comparison. Note that k is an arbitrary integer.
[0016]
Here, one GOP is composed of 12 frames from the B frame F (k−2) to the P frame F (k + 9). For example, P frame F (k + 3) is subjected to inter-frame predictive coding processing using I frame F (k) as a reference frame. In addition, the P frame F (k + 6) is subjected to inter-frame predictive coding processing using the P frame F (k + 3) as a reference frame. The B frames F (k + 1) and F (k + 2) are subjected to inter-frame predictive coding using the I frame F (k) and P frame F (k + 3) as reference frames. The
[0017]
For the encoded data corresponding to each frame obtained by the above encoding process, in order to reduce the memory capacity used in the decoding process, the array of the encoded data is changed to an image of each frame. Is changed from an array according to the display order to an array according to the decoding order of each frame (array change process). Specifically, in the encoded data obtained by subjecting the encoded data corresponding to the GOP to the above-described arrangement changing process, the encoded data D (k) of the I frame F (k) is, as shown in FIG. It is located at the beginning of the encoded data corresponding to the GOP, and thereafter encoded data D (k-2) of B frame F (k-2) and encoded data D (k of B frame F (k-1) -1), the encoded data D (k + 3) of the P frame F (k + 3) continues in order.
The encoded data corresponding to the GOP is recorded on a recording medium in the order after the arrangement changing process, or transmitted via a transmission medium.
[0018]
The header information of the video stream (encoded data obtained by the encoding process of the video signal) compliant with the MPEG standard includes information on horizontal and vertical screen sizes, frame frequencies, and aspect ratios as video resolution information. The header information also includes information for recognizing whether the video stream corresponds to an interlace signal or a progressive signal.
[0019]
In the DVD standard, encoded data corresponding to one or more GOPs and corresponding to a display time of 0.4 second or more and 1.0 second or less is defined as a video object unit (VOBU) (third data unit). The VOB is composed of a plurality of VOBUs.
[0020]
The VOBU includes a plurality of packs that are the first data unit, and the leading position of the VOBU and the leading position of the pack coincide. In addition, a pack called a navigation pack including information such as reproduction control information (PCI) and data search information (DSI) is arranged at the top of the VOBU.
[0021]
At present, in the field of television broadcasting, CS (communication satellite) broadcasting has been digitized for the first time, but following digital broadcasting of standard television signals, digital broadcasting of high-definition television signals is also started. Therefore, it is assumed that standard television signals and high-vision television signals are mixed in the same broadcast series, and that interlace signals and progressive signals are mixed in the same broadcast series. In such a case, the video resolution of the television signal broadcast in the same broadcast series changes when the program is switched.
[0022]
In such digital television broadcasting, a video stream and an audio stream are multiplexed according to the MPEG standard and transmitted as a transport stream.
[0023]
On the other hand, when the video stream and the audio stream are recorded on a DVD, the transport stream including the video stream and the audio stream is converted into a program stream in order to have a special reproduction function. To be recorded. Therefore, in order to receive a digital television broadcast signal and record an audio video stream on a DVD, it is necessary to convert the audio video stream from a transport stream to a program stream (TS / PS). Technology has already been developed. For example, Japanese Patent Laid-Open No. 11-45512 (Hitachi, Ltd.) discloses a technique for TS / PS conversion, that is, a technique for converting a transport stream into a program stream.
[0024]
Accordingly, a recording standard for recording the program stream on a recording medium such as an optical disc will be described in detail below.
First, FIG. 18 is a diagram for explaining the format of recording data based on the recording standard, and shows the detailed contents of the video attribute information (V_ATR) 10d1.
[0025]
The recording data 10 is data recorded on a recording medium by a recorder compliant with the recording standard. The recording data 10 includes a video manager (VMG) 10a and three video objects, that is, a video object (1) (VOB). (1)) 10a1, a video object (2) (VOB (2)) 10a2, and a video object (3) (VOB (3)) 10a3. The VOB (1) 10a1 to VOB (3) 10a3 include an audio video stream, and the VMG 10a includes management information for each VOB.
[0026]
Here, the recorded data 10 corresponds to one television broadcast program. Further, the recorded data 10 is recorded by being divided into three VOBs according to the recording standard as a result of the user performing two pause operations during recording of the audio video stream of the program. . That is, the boundary position between VOB (1) 10a1 and VOB (2) 10a2 corresponds to the first pause position, and the boundary position between VOB (2) 10a2 and VOB (3) 10a3 corresponds to the second pause position. ing. In other words, in the recording process based on the DVD recording standard, when the recording process of the audio video stream is paused, the streams before and after the pause position are recorded on the recording medium as separate VOBs.
[0027]
As described above, the VMG 10a is management information of each recorded VOB, and includes the video manager information (VMGI) 10b1 and the audio video file information table (AVFIT) 10b2. The VMGI 10b1 includes information relating to the time (recording time) when each VOB was recorded on the recording medium and the address (recording address) of the recording area in the recording medium corresponding to each VOB as the search information.
[0028]
The AVFIT 10b2 includes audio video file table information (AVFITI) 10c and video object stream information (VOB_STI) equal to the number of recorded VOBs, that is, VOB_STI (1) 10c1, VOB_STI (2) 10c2. , VOB_STI (3) 10c3. The AVFITI 10c includes information on the number of recorded VOBs. Each VOB_STI 10c1 to 10c3 describes attribute information of the corresponding VOB. For example, VOB_STI (1) 10c1 includes video attribute information (V_ATR) 10d1 and audio attribute information (A_ATR) 10d2.
[0029]
Hereinafter, first, the video attribute information (V_ATR) 10d1 will be described in detail.
The V_ATR 10d1 includes compression mode information 10e1, horizontal resolution (H_Video resolution) information 10e2, vertical resolution (V_Video resolution) information 10e3, frame frequency information 10e4, television system (TV System) information 10e5, Aspect ratio information 10e6 is included.
[0030]
Here, the compression mode information 10e1 is information for recognizing whether each VOB video stream is in the MPEG-1 encoding scheme or the MPEG-2 encoding scheme.
[0031]
In the horizontal resolution information 10e2, information for identifying the horizontal screen size corresponding to each VOB is described. Specifically, values such as 352, 480, 544, 704, 720, 1440, 1920 are described as the number of pixels in the horizontal direction.
[0032]
In the vertical resolution information 10e3, information for identifying the screen size in the vertical direction corresponding to each VOB is described. Specifically, values such as 240, 480, 576, 720, and 1080 are described as the number of scanning lines.
[0033]
The frame frequency information 10e4 is information for identifying the frame frequency corresponding to each VOB, and is, for example, frequency information such as 24, 29.97, 30, 25, 50, 60 Hz.
[0034]
The television system information 10e5 is information for identifying whether the video signal corresponding to each VOB is an interlace signal or a progressive signal.
[0035]
The aspect ratio information 10e6 is information for identifying the aspect ratio of the video signal corresponding to each VOB. For example, the aspect ratio information 10e6 is information indicating an aspect ratio value (4: 3 or 16: 9), a letterbox type, and the like. is there.
[0036]
In FIG. 18, the V_ATR 10d1 includes compression mode information 10e1, horizontal resolution information 10e2, vertical resolution information 10e3, frame frequency information 10e4, television system information 10e5, and aspect ratio information 10e6. As described above, the V_ATR 10d1 may include caption data information (Line21_switch) 10e7 in addition to the information 10e1 to 10e6. The caption data information 10e7 is information for identifying whether or not Line 21 data is included in each of the video signal of the first field and the video signal of the second field. Line 21 data (Closed Caption Data) is subtitle data to be superimposed on a portion corresponding to the 21st line of the video signal.
[0037]
Next, the audio attribute information (A_ATR) 10d2 will be described in detail.
FIG. 20 is a diagram for explaining the format of the recording data, and shows the detailed contents of the audio attribute information (A_ATR) 10d2.
[0038]
In this A_ATR 10d2, as information for identifying the attribute of the audio signal corresponding to each VOB, coding mode information 10f1, quantization information 10f2, dynamic range control information (DRC) 10f3, sampling Frequency information (fs) 10f4, number of audio channels information (Number of Audio channels) 10f5, and audio bit rate information (Bitrate) 10f6 are included.
[0039]
Here, the coding mode information 10f1 is information for identifying the type of the audio stream corresponding to each VOB. For example, the audio stream is Dolby AC3 system, MPEG-1 system, MPEG-2. It shows which method, such as the method or Linear PCM, is supported.
[0040]
Quantization information 10f2 identifies the number of quantization bits (16 bits, 20 bits, 24 bits, etc.) for Linear PCM when the audio stream corresponding to each VOB has been subjected to Linear PCM (Pulse Code Modulation). It is information to do.
[0041]
The dynamic range control information 10f3 is information for identifying whether or not there is dynamic range control data in the MPEG-1 or MPEG-2 encoding process in the audio stream corresponding to each VOB. It is.
[0042]
The sampling frequency information 10f4 is information for identifying the sampling frequency (48 kHz, 96 kHz, etc.) of the audio stream corresponding to each VOB.
[0043]
The audio channel number information 10f5 is the number of reproduced audio signal channels (1ch (mono), 2ch (stereo), 2ch (dual mono), 3ch, 4ch, 5ch, 6ch, 7ch) obtained from the audio stream corresponding to each VOB. 8ch).
[0044]
The audio bit rate information (Bitrate) 10f6 identifies the bit rate (64 kbps, 89 kbps, 112 kbps, 128 kbps, 160 kbps, 192 kbps, 224 kbps, 256 kbps, 320 kbps, 384 kbps, 448 kbps, 768 kbps, 1536 kbps) corresponding to each VOB. It is information for.
[0045]
By reading the VMG 10a from the recording data recorded on the recording medium (optical disk) as described above, it is possible to recognize the recording time and recording address of the audio video stream of each VOB, and the attribute information of each VOB. .
[0046]
Next, the configuration of the VOB in the recording data 10 will be described.
FIGS. 21 and 22 are diagrams for explaining the configuration of the VOB in the recording data 10, and FIGS. 21A and 22A show the detailed configuration of the VOB (1) 10a1 of the recording data 10. FIG. Is shown.
[0047]
The VOB (1) 10a1 includes several video object units (VOBU) (here, VOBU (1) 10g1, VOBU (2) 10g2, VOBU (3) 10g3, VOBU (4) 10g4,..., VOBU). (n) 10 gn).
[0048]
One VOBU includes an audio video stream corresponding to one or more GOPs corresponding to a display time of 0.4 to 1.0 seconds. For example, a VOBU (1) 10g1 includes a plurality of video packs (V_PCK) 10h (1), 10h (2), 10h (3),..., 10h (r) and a plurality of audio packs (A_PCK) 10i ( 1), 10i (2), ..., 10i (s). Each of the video pack and the audio pack has a predetermined data size. Here, the data size of the video pack and the audio pack is 2048 bytes.
[0049]
FIG. 21B shows the correspondence between the video packs 10h (1) to 10h (8) of the packs constituting the VOBU (1) 10g1 and the stream of each frame constituting the GOP.
[0050]
Here, VOBU (1) 10g1 includes a video stream corresponding to one GOP. Specifically, the video stream included in the VOBU (1) 10g1 is encoded data Dv1, I-frame encoded data Dv2, and Dv3, P-frame encoded data Dv4, B-frame encoded data Dv5. And Dv6, P frame encoded data Dv7, B frame encoded data Dv8 and Dv9, and padding data Dpud.
[0051]
Here, since each VOBU is composed of a 2048-byte video pack and audio pack, the data size of the VOBU must be an integer multiple of 2048 bytes. Therefore, padding data Dpud is added to a video stream of one GOP so that the data size of the video stream included in the VOBU matches an integer multiple of 2048 bytes.
[0052]
FIG. 22B shows the correspondence between the audio packs 10i (1) to 10i (4) of the packs constituting the VOBU (1) 10g1 and the stream of each audio frame.
[0053]
The VOBU (1) 10g1 includes an audio stream corresponding to one GOP. Specifically, the audio stream included in the VOBU (1) 10g1 includes encoded data of audio frames Da1 to Da8 and padding data Dpud1 to Dpud1 to audio packs (A_PCK) 10i (1) to 10i (4). It is composed of Dpud4. That is, the A_PCK10i (1) includes encoded data and padding data Dpud1 of audio frames Da1 and Da2, and A_PCK10i (2) includes encoded data and padding data Dpud2 of audio frames Da3 and Da4. , A_PCK10i (3) includes encoded data of audio frames Da5 and Da6 and padding data Dpud3, and A_PCK10i (4) includes encoded data of audio frames Da7 and Da8 and padding data Dpud4. .
[0054]
Thus, by configuring an audio stream of one A_PCK10i (s) from encoded data and padding data of two audio frames, the data size of the audio stream included in the VOBU is an integral multiple of 2048 bytes. Try to match.
[0055]
21 (b) and 22 (b) show in detail only the configurations of the VOB 10a1 and VOBU (1) 10g1, but VOBs 10a2 and 10a3 other than the VOB 10a1 and those other than the VOBU (1) 10g1 are shown. VOBU (2) 10g2 to VOBU (n) 10gn have the same configuration as VOB10a1 and VOBU (1) 10g1, respectively.
[0056]
As described above, the VOBU has a data structure in which the data unit is divided into data units of a predetermined data size (2048 bytes), thereby simplifying address management for the VOBU and facilitating data access to the recording medium in units of VOBU. Become.
[0057]
[Problems to be solved by the invention]
However, in the conventional recording apparatus, the normal audio video stream is recorded as one VOB, and the management of the attributes is collectively performed for the entire audio video stream. For this reason, there were various problems as follows.
[0058]
These problems are described in detail below.
In a conventional recording apparatus, when an audio video stream is recorded, the stream input to the recording apparatus between the start of recording of the audio video stream and the end of the recording is recorded as one VOB on the recording medium. Is done. However, when the recording operation is paused during the recording of the stream, the stream input before the suspension and the stream input after the suspension are recorded on the recording medium as different VOBs. . In addition, the audio video stream may be recorded as a plurality of VOBs due to other factors.
[0059]
In other words, in a conventional recording apparatus, an audio video stream corresponding to one program is usually recorded on a recording medium as one VOB. In addition, when a portion corresponding to CM (commercial) in the stream is not recorded by the pause operation during the recording of the stream, an audio video stream corresponding to one program has a plurality of audio video streams. It will be recorded as a different VOB.
[0060]
By the way, since the digital broadcast signal is usually input to the recording device as an MPEG stream (audio video stream corresponding to the MPEG standard), when receiving and recording the digital broadcast signal, the analog broadcast signal is received and recorded. Unlike the case where the image is recorded, video attributes such as video resolution change depending on the scene of the image during recording. For example, the horizontal resolution may change from 720 pixels to 352 pixels.
[0061]
Further, when a standard television broadcast program and a high-definition television broadcast program are continuously recorded, the aspect ratio that is the attribute of the recording data corresponding to these programs is 4: 3 at the switching point of the two programs. To 16: 9.
[0062]
In such a case, two audio video streams having different attributes are recorded as one VOB, which makes it difficult to manage the video attributes of the streams recorded on the recording medium.
[0063]
Also, in the playback process of playing back an audio video stream recorded on a recording medium, the video stream (encoded data) is decoded using the video resolution as a parameter, so management of the video resolution as a video attribute is not possible. If the video resolution change is complete and the decoder that performs the decoding process cannot be notified, the decoding process for the video stream may fail.
[0064]
Furthermore, since the recording position of the audio video stream is managed by an address corresponding to each VOBU constituting the VOB, it is possible to directly access the position of the stream included in the VOBU where the change in the video resolution has occurred. There is also a problem that it is not possible to start a program based on a change in video resolution at a high speed.
[0065]
The encoded data included in the VOBU is divided into data units (packs) having a fixed data size (2048 bytes) by packing, and each pack is managed by an address indicating the recording position of the head data. However, the position corresponding to the change point of the video resolution in the stream does not necessarily match the top position of the pack which is also a unit of access, and therefore an address indicating the recording position of the pack may be used. There is a problem in that it is impossible to access the change position of the video resolution in the stream.
[0066]
When a video signal is encoded by the MPEG-2 encoding method, an encoding mode for each frame is determined based on a predetermined rule, and at least one I frame is determined according to the determined encoding mode. Since the encoding process is performed so that a GOP composed of a plurality of P frames and a plurality of B frames is configured, when the video resolution changes, the video resolution may differ between frames constituting one GOP, There was a problem that a stream corresponding to the MPEG-2 standard could not be generated.
[0067]
Furthermore, in the MPEG encoding method, an interframe predictive encoding process is performed in which a current frame video signal to be processed is encoded with reference to a processed reference frame video signal, so that the video resolution changes. There is also a problem that a difference in resolution occurs between the current frame and the reference frame, and the interframe predictive coding process fails.
[0068]
In addition, when recording encoded data obtained by encoding a television signal with a changing video aspect ratio, the following problems occur as in the case where the video resolution changes as described above.
[0069]
That is, the change of the video aspect ratio makes it difficult to manage video attributes for the recorded audio video stream (encoded data). In the reproduction process, the decoding process of the encoded data fails due to a change in the video aspect ratio. Furthermore, high speed access to a portion of the video stream where the video aspect ratio has changed is impossible.
[0070]
Furthermore, in the MPEG encoding method, when the video aspect ratio changes, as in the case where the video resolution changes as described above, a stream corresponding to the MPEG-2 standard cannot be generated, and the interframe predictive encoding process fails. The problem arises.
[0071]
Note that in a video signal having not only video resolution and video aspect ratio but also a plurality of other video attributes such as an encoding method, it is possible to access the position where the change of the video attribute occurs in the recorded video stream. There is a problem that you can not.
[0072]
In addition, in an audio video signal including not only a video signal but also an audio signal accompanying this signal, the encoding method, the number of channels, the number of channels in the encoded data recorded corresponding to this audio video signal, There is a problem that it is impossible to access a position where an audio attribute such as a bit rate has changed.
[0073]
The present invention has been made in view of the above problems. At least one of video attributes such as an encoding method, video resolution, and video aspect ratio and audio attributes such as an encoding method, the number of channels, and a bit rate is provided. It is an object of the present invention to provide a recording apparatus that records encoded data corresponding to a television signal whose attribute changes so that a portion where the attribute change has occurred can be accessed at high speed.
[0074]
The present invention provides a recording medium capable of recording encoded data corresponding to a television signal in which at least one of the video attribute and the audio attribute changes, on a recording medium while managing so that the decoding process is satisfactorily performed. An object is to provide an apparatus.
[0075]
It is an object of the present invention to obtain an encoding apparatus capable of encoding a video signal whose video attributes such as an encoding method, video resolution, and video aspect ratio change according to an encoding method such as MPEG.
[0076]
[Means for Solving the Problems]
This departure Clearly The recording apparatus is an apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium, and based on the audio video stream, the video signal and the audio signal are recorded. An attribute detection unit that detects an attribute related to at least one signal and outputs attribute data indicating the attribute; and an audio video recorded on the recording medium corresponding to a time point when the attribute changes based on the attribute data An information generation unit that detects a recording time of the audio video stream with respect to a reference time corresponding to a recording position of the stream or the attribute change time, and outputs attribute change information indicating the recording position or the recording time; the attribute data; A recording unit for recording the attribute change information on the recording medium It is those with a.
[0077]
This departure Tomorrow , the above In the recording apparatus, the attribute detection unit detects a video attribute related to the video signal and an audio attribute related to the audio signal, and outputs attribute data indicating each attribute, and the recording unit includes an attribute indicating the video attribute. Data and attribute data indicating the audio attribute are recorded in predetermined recording areas of the recording medium, respectively.
[0078]
This departure Tomorrow , the above In the recording apparatus, the attribute detection unit detects the video resolution of the video signal as an attribute relating to the video signal, outputs video resolution data indicating the resolution, and the information generation unit includes the video resolution data. Based on the above, the recording position of the stream recorded on the recording medium corresponding to the time when the video resolution changes, or the recording time of the stream with respect to the reference time corresponding to the change time of the video resolution is detected. Resolution change information indicating the recording position or recording time is output, and the recording unit records the video resolution data and the resolution change information on the recording medium.
[0079]
This departure Tomorrow , the above In the recording apparatus, the attribute detection unit detects an aspect ratio of the video signal as an attribute relating to the video signal, outputs aspect ratio data indicating the aspect ratio, and the information generation unit includes the aspect ratio. Based on the data, the recording position of the stream recorded on the recording medium corresponding to the time when the aspect ratio changes, or the recording time of the stream with respect to the reference time corresponding to the change time of the aspect ratio is detected. Aspect ratio change information indicating the recording position or recording time is output, and the recording unit records the aspect ratio and the aspect ratio change information on the recording medium.
[0080]
This departure Tomorrow An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium so that a pack is formed with the audio video stream as a data unit for each predetermined size. A packing processing unit that performs packing processing to be divided and outputs an audio video stream corresponding to each pack as pack data; and a recording unit that records the pack data on the recording medium as an access unit to the recording medium; An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute, and the pack processing unit includes: Based on the attribute data, Position where the attribute is changed in the stream, is obtained by those performing the pack processing so as to be positioned at the head of the pack.
[0081]
This departure Tomorrow , the above In the recording device, the attribute detection unit detects a video attribute related to the video signal and an audio attribute related to the audio signal based on the audio video stream, and video attribute data indicating the video attribute and audio attribute indicating the audio attribute. Data is output, and the recording unit records video attribute data indicating the video attribute and audio attribute data indicating the audio attribute in a predetermined recording area of the recording medium.
[0082]
This departure Tomorrow , the above In the recording device, based on the attribute data, at the recording position of the audio video stream recorded on the recording medium corresponding to the time when at least one of the audio attribute and the video attribute changes, or at the time when the attribute changes A corresponding information generating unit that detects a recording time of the audio video stream with respect to a reference time and outputs attribute change information indicating the recording position or recording time, and records the attribute change information on the recording medium. .
[0083]
This departure Tomorrow , the above In the recording apparatus, the attribute detecting unit detects the video resolution of the video signal as an attribute relating to the video signal, outputs video resolution data indicating the resolution, and the packing processing unit includes the video resolution. Based on the data, the packing process is performed so that the position where the video resolution has changed in the video stream is positioned at the head of the pack.
[0084]
This departure Tomorrow , the above In the recording apparatus, the attribute detecting unit detects an aspect ratio of the video signal as an attribute relating to the video signal, outputs aspect ratio data indicating the aspect ratio, and the packed processing unit includes the aspect processing unit. Based on the ratio data, the packing process is performed so that the position where the aspect ratio has changed in the video stream is positioned at the head of the pack.
[0085]
This departure Tomorrow An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium, wherein the audio video stream is divided into management units for managing the stream. A video object composer for outputting a portion corresponding to each management unit of the stream as video object data, a recording unit for recording management information for managing each video object data on the recording medium, and the audio video An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the stream and outputs attribute data indicating the attribute, and the video object composer is based on the attribute data When the above attribute changes, The audio video stream is divided so that a portion of the audio video stream before the attribute change point and a portion of the audio video stream after the attribute change point are output as separate video object data. It is intended.
[0086]
This departure Tomorrow , the above In the recording apparatus, the management information includes information regarding the recording position of each video object data with respect to the recording medium or the recording time of each video object data with respect to the reference time.
[0087]
This departure Tomorrow , the above In the recording device, the attribute detection unit detects a video attribute related to the video signal and an audio attribute related to the audio signal based on the audio video stream, and video attribute data indicating the video attribute and audio attribute indicating the audio attribute. Data is output, and the management information is information including video attribute information indicating the video attribute and audio attribute information indicating the audio attribute.
[0088]
This departure Tomorrow , the above In the recording apparatus, the attribute detection unit detects the video resolution of the video signal as an attribute relating to the video signal, outputs video resolution data indicating the resolution, and the video object composer includes the video resolution. Based on the data, when the video resolution changes, a portion of the video stream before the change point of the video resolution and a portion of the video stream after the change point of the video resolution are different videos. The video stream is divided so as to be output as object data.
[0089]
This departure Tomorrow , the above In the recording apparatus, the attribute detection unit detects an aspect ratio of the video signal as an attribute relating to the video signal, outputs aspect ratio data indicating the aspect ratio, and the video object composer includes the aspect ratio When the aspect ratio changes based on the ratio data, a portion of the video stream before the aspect ratio change point and a portion of the video stream after the aspect ratio change point are separate video objects. The video stream is divided so as to be output as data.
[0090]
This departure Tomorrow An apparatus for encoding a video signal, wherein a frame group including at least one frame subjected to the intra-frame encoding process or inter-frame encoding process for the video signal is configured. And a video encoding unit for outputting a video stream corresponding to the frame group as a stream unit that can be randomly accessed, and video attribute data indicating the video attribute by detecting the video attribute based on the video signal And a video attribute detector configured to configure the frame group so that a specific frame having a video attribute different from the immediately preceding frame is a first frame of the frame group. Is.
[0091]
This departure Tomorrow , the above An encoding apparatus includes an audio attribute detector that detects an audio attribute based on an audio signal accompanying the video signal and outputs audio attribute data indicating the audio attribute, and the video encoding unit includes the video encoding unit. The frame group is configured such that a specific frame having a different attribute or audio attribute from the immediately preceding frame is the first frame of the frame group.
[0092]
This departure Tomorrow , the above The encoding apparatus includes a pack processing unit that performs pack processing for dividing the video stream so as to form a pack as a data unit for each predetermined size, and outputs a stream corresponding to each pack as pack data. The packing processing unit performs the packing processing so that the position where the video attribute or the audio attribute in the video stream is changed is positioned at the head of the pack.
[0093]
This departure Tomorrow , the above In the encoding device, the video encoding unit performs an encoding process on each frame in a specific frame group including the specific frame, and a video corresponding to a frame in a frame group on which the encoding process has been performed before the specific frame group. This is done without referring to the signal.
[0094]
This departure Tomorrow , the above In the encoding device, the video attribute detection unit detects the video resolution of the video signal as the video attribute based on the video signal, and outputs video resolution data indicating the video resolution, and the video encoding Based on the video resolution data, the frame group is configured such that a specific frame having a video resolution different from that of the immediately preceding frame becomes the first frame of the frame group.
[0095]
This departure Tomorrow , the above The encoding apparatus includes a pack processing unit that performs pack processing for dividing the video stream so as to form a pack as a data unit for each predetermined size, and outputs a stream corresponding to each pack as pack data. The packing processing unit performs the packing processing so that the position where the video resolution has changed in the video stream is positioned at the head of the pack.
[0096]
This departure Tomorrow , the above In the encoding device, the attribute detector detects an aspect ratio of the video signal as the video attribute based on the video signal, and outputs aspect ratio data indicating the aspect ratio. Based on the aspect ratio data, the frame group is configured such that a specific frame having a different aspect ratio from the immediately preceding frame becomes the first frame of the frame group.
[0097]
This departure Tomorrow , the above The encoding apparatus includes a pack processing unit that performs pack processing for dividing the video stream so as to form a pack as a data unit for each predetermined size, and outputs a stream corresponding to each pack as pack data. The packing processing unit performs the packing processing so that the position where the aspect ratio has changed in the video stream is positioned at the head of the pack.
[0098]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0099]
(Embodiment 1)
FIG. 1 is a block diagram for explaining a recording apparatus according to Embodiment 1 of the present invention.
The recording apparatus 100a according to the first embodiment receives a digital broadcast signal Sbr and outputs an audio video stream Sav, and converts the audio video stream Sav into recording format data according to a video standard format. And a VOB composer 103 that outputs VOB data Dvob.
[0100]
The broadcast receiver 102 has a TS / PS conversion function for converting a transmission format stream (transport stream) into a recording format stream (program stream), and is output from the broadcast receiver 102. The audio video stream Sav is a program stream. Further, between the broadcast receiver 102 and the VOB composer 103, a pack that performs a packing process for dividing the audio video stream Sav into first data units having a certain size (2K bytes in this case). A packer (not shown) is provided, and data (PCK data) corresponding to each data section (pack) is sequentially output to the VOB composer 103 from the packer. The packer outputs an audio pack (A_PCK) storing an audio stream and a video pack (V_PCK) storing a video stream as the PCK data. Here, the PCK data is 2K bytes of fixed length data, but the PCK data may be variable length data. In this case, the data size is written in the header of each pack. Further, the VOB composer 103 forms a third data unit (VOBU) composed of a plurality of packs based on the PCK data from the packer, as shown in FIGS. A second data unit (VOB) composed of VOBU is formed, and data corresponding to the VOB is output as the VOB data Dvob.
[0101]
The recording device 100a receives the audio video stream Sav, detects the video attribute corresponding to the video stream by analyzing the header information of the video stream included therein, and data indicating the video attribute (video attribute data) The video attribute detector 107 that outputs Dva and the audio video stream Sav are received, the audio attribute corresponding to the audio stream is detected by analyzing the header information of the audio stream included therein, and the data ( Audio attribute data) The audio attribute detector 109 outputs Daa.
[0102]
Here, the video attributes include the encoding mode (for example, MPEG-1 method or MPEG-2 method), horizontal screen size, vertical screen size, frame frequency, pixel sampling frequency, color signal component format, aspect ratio. There are ratio, letterbox, bit rate, scan mode (ie interlaced or progressive), etc. The video attribute detector 107 is configured to detect at least one attribute information among information indicating these attributes. Audio attributes include a coding method, the number of channels, a sampling frequency, the number of quantization bits, a dynamic range control, a bit rate, and the like. The audio attribute detector 109 has at least one of information indicating these attributes. More than one attribute information is detected.
[0103]
The recording device 100a includes a system controller 111 that generates write address information Iwa indicating a position (write address) for writing data in a recording area of the recording medium 106, the video attribute data Daa, audio attribute information Dva, and address information Iwa. Based on the address information generator 108 for outputting the specific address information Isa indicating the write address at the time when the attribute change occurred, and each VOB based on the video attribute data Dva, the audio attribute data Daa and the specific address information Isa. And a VMG generator 110 that generates VMG information Dvmg, which is management information corresponding to. When there is a change in the video attribute and audio attribute of the audio video stream Sav, the VMG generator 110 outputs, as the VMG information Dvmg, information including specific address information Isa indicating a write address at the time when the attribute change has occurred. It is the composition to do.
[0104]
The recording apparatus 100a performs an error correction code addition process and a recording modulation process on the VOB data Dvob from the VOB composer 103 and the VMG information Dvmg from the VMG generator 110, and handles the VOB data. A recording signal processor 110 that outputs a recording signal Sre and a recording head 105 that writes the recording signal Sre on a recording medium 106 such as an optical disk are provided.
In FIG. 1, reference numeral 101 denotes an antenna that receives the digital broadcast signal, and an output of the antenna 101 is input to the broadcast receiver 102.
[0105]
Next, the operation will be described.
When the broadcast signal Sbr from the antenna 101 is received by the broadcast receiver 102, the broadcast receiver 102 extracts the audio video stream Sav by a predetermined process for the broadcast signal Sbr. The audio video stream Sav is output to a packer (not shown), a video attribute detector 107, and an audio attribute detector 109. From the broadcast receiver 102, the audio video stream Sav is output as a program stream by the TS / PS conversion function of the receiver 102.
[0106]
In the packer, the audio video stream Sav is packed, and the audio video stream Sav is output to the VOB composer 103 as PCK data obtained by the packing process.
[0107]
Then, in the VOB composer 103, the audio video stream (PCK data) Sav is converted into VOB data Dvob (see FIGS. 21 and 22) in accordance with the DVD recording standard format, and the VOB data Dvob is sent to the recording signal processor 104. Is output.
[0108]
The VOB data Dvob is subjected to error correction code addition processing and recording modulation processing by the recording signal processor 104 to generate a recording signal Sre corresponding to the VOB data Dvob. The recording signal Sre is written in a predetermined recording area of the optical disk (recording medium) 106 by the recording head 105 in accordance with the write address information Iwa generated by the system controller 111.
[0109]
Further, the video attribute detector 107 detects the video attribute corresponding to the video stream by analyzing the header information of the video stream included in the audio video stream Sav, and data (video attribute data) Dva indicating the video attribute. Is output to the address information generator 108 and the VMG generator 110.
[0110]
On the other hand, the audio attribute detector 109 detects the audio attribute corresponding to the audio stream by analyzing the header information of the audio stream included in the audio video stream Sav, and data (audio attribute data) Daa indicating the audio attribute. Is output to the address information generator 108 and the VMG generator 110.
[0111]
In the address information generator 108, when at least one of the video attribute and the audio attribute is changed, the video attribute or the audio attribute is changed based on the write address information Iwa, the video attribute data Dva, and the audio attribute data Daa. Specific address information Isa indicating the write address at the time is generated, and the specific address information Isa is output to the VMG generator 110.
[0112]
In the VMG generator 110, VMG information Dvmg, which is management information corresponding to each VOB, is generated based on the video attribute information Dva, the audio attribute information Daa, and the specific address information Isa. The VMG information Dvmg is subjected to error correction code addition processing and recording modulation processing by the recording signal processor 104, and a recording signal Sre corresponding to the VMG information Dvmg is generated. This recording signal Sre is written on the optical disk 106 by the recording head 105. The recording signal Sre corresponding to the VMG information Dvmg is written in a predetermined recording area of the recording medium after the recording of the recording signal Sre corresponding to the VOB data Dvob on the recording medium is completed. At this time, the specific address information Isa is written in a recording area corresponding to the VMGI information 10b1. Further, the video attribute data Dva and the audio attribute data Daa are recorded in V_ATR 10d1 and A_ATR 10d2 in the VMG information 10a.
[0113]
As described above, in the recording apparatus 100a according to the first embodiment, the video attribute is detected based on the detector 107 that detects the video attribute, the detector 109 that detects the audio attribute, and the detection outputs of the detectors 107 and 109. Alternatively, an address information generator 108 that generates specific address information Isa indicating a data write address at the time when the audio attribute changes is provided, and the specific address information Isa constitutes management information (VMG information) 10a of each VOB. Since the recording is performed in the recording area of the optical disc 106 corresponding to the VMGI 10b1, when reproducing the audio video stream recorded on the optical disc 106, the video attribute in the audio video stream is read by reading the VMG information 10a. Or the part where the audio attribute changed It is possible to recognize the recording position, when playing the audio video stream, the optical disk, it is possible to access the high speed to the recording position of the stream where the video attribute or audio attribute change occurs.
[0114]
In the first embodiment, the specific address information Isa indicating the data write address at the time when the video attribute or the audio attribute is changed is recorded on the recording medium. However, instead of the specific address information Isa, Information indicating the recording time with respect to the reference time at the time when the video attribute or the audio attribute changes may be recorded on the recording medium.
[0115]
(Embodiment 2)
FIG. 2 is a block diagram for explaining a recording apparatus according to Embodiment 2 of the present invention.
The recording apparatus 100b according to the second embodiment performs the packing process in place of the packer (not shown) of the recording apparatus 100a according to the first embodiment, and also changes the audio attribute or video attribute. A packer 112 for inserting padding data after the stream immediately before the attribute change into the pack being created so that the stream before the attribute change and the stream after the attribute change are not included in one pack; Based on the video attribute data Dva, the audio attribute data Daa, and the internal signal Sop in the packer 112, the size of the padding data is calculated, and data (size data) Dps indicating the size is sent to the packer 112. A padding size generator 113 for output. The padding data is also called stuffing data.
[0116]
The other configuration of the recording apparatus 100b according to the second embodiment is the same as that of the recording apparatus 100a according to the first embodiment.
Reference numeral 103b denotes a VOB composer in the recording apparatus 100b according to the second embodiment. This VOB composer 103b is similar to the VOB composer 103 in the first embodiment, and the PCK data Dpck from the packer 112 is used. Is converted into VOB data Dvob in accordance with a video standard format.
[0117]
Next, the operation will be described.
In the recording apparatus 100b of the second embodiment, the audio video stream Sav from the broadcast receiver 102 is divided by the packer 112 into data units (first data units) having a constant data size, and The PCK data Dpck corresponding to the data section (pack) is output to the VOB composer 103b. At this time, the audio stream is output as audio PCK data (hereinafter also simply referred to as an audio pack), and the video stream is output as video PCK data (hereinafter also simply referred to as a video pack) to the VOB composer 103b.
[0118]
Then, in the VOB composer 103b, a number of audio packs and video packs corresponding to a predetermined display time are collected as VOBU (third data unit), and the audio video input between the start of recording and the end of recording is recorded. VOB data Dvob composed of a plurality of VOBUs corresponding to the stream Sav is generated.
[0119]
The VOB data Dvob is converted into a recording signal Sre by the recording signal processor 104 and recorded on the recording medium 106 by the optical head 105 based on the write address Iwa.
[0120]
The video attribute detector 107 outputs video attribute data Dva by detecting the video attribute, and the audio attribute detector 109 outputs audio attribute data Daa by detecting the audio attribute.
[0121]
The address information generator 108 outputs specific address information Isa indicating a write address when the audio attribute or the video attribute changes, based on the video attribute data Dva, the audio attribute data Daa, and the write address information Iwa.
[0122]
The padding size generator 113 receives the video attribute data Dva, the audio attribute data Daa, and the internal signal Sop indicating the pack processing state in the packer 112. When the video attribute or the audio attribute changes, the padding size generator 113 The size is calculated, and information (size information) Dps indicating the data size is output. Specifically, when an attribute change is detected in a state where the packer 112 stores a stream (that is, a video stream or an audio stream) in a predetermined pack, the free data size of the pack at this time is Calculated as the size of the padding data.
[0123]
When the data size information Dps is input to the packer 112, the vacant part of the pack at that time contains padding data in place of the part after the position where the attribute change has occurred in the stream. The data amount indicated by the information Dps is inserted. Thus, even if an attribute change occurs during creation of a predetermined pack, the predetermined pack does not include stream data before the attribute change and a stream after the attribute change. In other words, when an attribute change occurs, the stream before the attribute change and the stream after the attribute change are stored in separate adjacent packs, and the stream data after the attribute change is stored in the predetermined pack. It will be stored from the beginning of the subsequent pack.
[0124]
Other operations in the recording apparatus 100b are performed in the same manner as in the recording apparatus 100a of the first embodiment, and the recording signal Sre corresponding to the VMG information Dvmg corresponding to each VOB is recorded on the recording medium 106.
[0125]
As described above, in the recording apparatus 100b of the second embodiment, instead of the packer of the first embodiment, the packer 112 that inserts padding data into the pack when the audio attribute or the video attribute changes, and the above-described packer A padding data generator 113 for calculating the size of padding data. When an attribute change occurs, padding data is inserted in the pack being created in place of the stream after the attribute change. The stream head after the attribute change is recorded so that the head of the pack matches.
[0126]
For this reason, when the audio video stream recorded on the optical disc 106 is reproduced, the video attribute or the audio attribute in the audio video stream in which the recording address is managed in pack units is changed by reading the VMG information 10a. The recording position corresponding to the recorded portion can be recognized, and at the time of reproduction of the audio video stream, it is possible to access the recording position of the stream where the attribute change has occurred on the optical disc at high speed.
[0127]
In the second embodiment, the predetermined position of the stream and the head position of the pack are matched by inserting padding data into the pack, but the predetermined position of the stream and the head position of the pack are The matching method is not limited to this, and for example, the size information of the pack data described in the pack header or the like may be changed.
[0128]
In the first and second embodiments, both the video attribute and the audio attribute are detected and the specific address information Isa is generated according to the change. However, only one of the video attribute and the audio attribute is generated. May be detected, and the specific address information Isa may be generated according to the detected change in the attribute.
[0129]
(Embodiment 3)
FIG. 3 is a block diagram for explaining a recording apparatus according to Embodiment 3 of the present invention.
The recording apparatus 100c according to the third embodiment replaces the address information generator 108 and the VMG generator 110 in the recording apparatus 100a according to the first embodiment with video attribute data Dva and audio from the attribute detectors 107 and 109. A VMG generator 110c that generates VMG information Dvmg, which is VOB management information, based on the attribute data Daa is provided.
[0130]
Further, the recording apparatus 100c changes the attribute when either the audio attribute or the video attribute changes based on the video attribute data Dva and the audio attribute data Daa instead of the VOB composer 103 in the recording apparatus 100a. A VOB composer 103c that generates VOB data is provided so that the previous stream and the stream after the attribute change are classified as separate VOB data.
The other configuration of the recording apparatus 100c according to the third embodiment is the same as that of the recording apparatus 100a according to the first embodiment.
[0131]
Next, the operation will be described.
In the third embodiment, the broadcast signal Sbr from the antenna 101 is received by the broadcast receiver 102, and the audio video stream Sav from the receiver 102 is converted into a VOB composer 103c, a video attribute detector 107, and an audio attribute detector. When input to 109, the VOB composer 103c converts the audio video stream Sav into VOB data Dvob (see FIGS. 21 and 22) in accordance with the DVD recording standard format. The VOB data Dvob is converted into a recording signal Sre by the recording signal processor 104, and the recording signal Sre is written on the optical disk 106 by the recording head 105.
[0132]
Further, the video attribute detector 107 detects a video attribute based on the audio video stream Sav, and outputs the video attribute data Dva to the VOB composer 103c and the VMG generator 110. The audio attribute detector 109 detects an audio attribute based on the audio video stream Sav, and outputs audio attribute data Daa to the VOB composer 103c and the VMG generator 110.
[0133]
The operations of the receiver 102, the VOB composing device 103c, the recording signal processor 104, the recording head 105, and the attribute detectors 107 and 109 are exactly the same as those in the first embodiment.
[0134]
In the third embodiment, when the video attribute or the audio attribute changes during recording of the audio video stream Sav, the VOB composer 103c separates the stream before the attribute change and the stream after the attribute change into different VOBs. VOB data Dvob corresponding to the audio video stream Sav is formed so as to be data.
[0135]
The VMG generator 110 c generates VMG information Dvmg, which is management information corresponding to the recorded VOB data, and outputs the VMG information Dvmg to the recording signal processor 104. In the processor 104, the VMG information Dvmg is subjected to error correction code addition processing and recording modulation processing, and a recording signal Sre corresponding to the VMG information Dvmg is generated. The recording signal Sre is recorded on the optical disk 106 by the optical head 105.
[0136]
As shown in FIG. 18, the VMG information Dvmg includes the recording start address information, search information, video attribute information, and audio attribute information as management information corresponding to each VOB data. Here, the search information is information for detecting a predetermined position of the recorded audio video stream.
[0137]
As described above, in the recording apparatus 100c of the third embodiment, when either the audio attribute or the video attribute changes, the stream before the attribute change and the stream after the attribute change are classified as separate VOB data. Since the VOB composer 103c for forming VOB data is provided, the video attribute and the audio attribute can be unified for one VOB data. As a result, when the recorded signal recorded on the optical disc 106 is reproduced, it is possible to easily perform the decoding process for each VOB data based on the video attribute and the audio attribute managed in each VOB unit. .
[0138]
Further, by reading the VMG information Dvmg, it is possible to access at high speed the recording position where the attribute change of the stream recorded on the optical disc occurs when the audio video stream is reproduced.
[0139]
In the third embodiment, both the video attribute and the audio attribute are detected, and VOB data is generated according to these changes. However, only one of the video attribute and the audio attribute is detected, The VOB data may be generated according to the detected attribute change.
[0140]
(Embodiment 4)
FIG. 4 is a block diagram for explaining a recording apparatus according to Embodiment 4 of the present invention.
Similar to the recording device 100a of the first embodiment, the recording device 100d of the fourth embodiment receives the digital broadcast signal Sbr, and converts the audio video stream Sav obtained from the digital broadcast signal Sbr according to the format of the DVD recording standard. It is recorded on a recording medium.
[0141]
In other words, the recording apparatus 100d receives the digital broadcast signal Sbr from the antenna 101 and outputs the audio video stream Sav, and the audio video stream Sav corresponds to the DVD recording standard format. A VOB composer 103 that converts the data into VOB data Dvob, and a recording signal processor 110 that performs error correction code addition processing and recording modulation processing on the VOB data Dvob and outputs a recording signal Sre corresponding to the VOB data. And a recording head 105 for writing the recording signal Sre to the recording medium 106. In the recording apparatus 100d, as in the first embodiment, a packer (not shown) that performs a packing process on the audio video stream Sav is provided between the broadcast receiver 102 and the VOB composer 103. PCK data is input to the VOB composer 103 as an audio video stream Sav.
[0142]
The antenna 101, the receiver 102, the VOB composer 103, the recording signal processor 104, the recording head 105, the recording medium 106, and the packer (not shown) are exactly the same as those in the first embodiment. belongs to.
[0143]
The recording apparatus 100d receives the audio video stream Sav, detects the video resolution by analyzing the header information of the video stream included therein, and outputs video resolution data (video resolution data) Dvr. It has a detector 107d.
[0144]
Here, the video resolution detector 107d is configured to detect at least one of the horizontal resolution, the vertical resolution, and the temporal resolution (frame frequency) as the video resolution.
[0145]
The horizontal resolution represents an image size in the horizontal direction, and specifically, information such as 352, 480, 544, 704, 720, 1440, 1920 pixels is used as the image size.
[0146]
The vertical resolution represents an image size in the vertical direction. Specifically, information such as 240, 480, 576, 720, and 1080 lines is used as the image size.
[0147]
Furthermore, the temporal resolution is represented by a frame frequency. Specifically, values such as 24, 30, 50, 59.97, and 60 Hz are used as the frame frequency value.
[0148]
The video resolution detector 107d may be configured to detect whether the audio video stream Sav is encoded data corresponding to an interlace signal or a progressive signal as the time resolution.
[0149]
Further, the recording device 100d is based on the system controller 111 that generates the write address information Iwa indicating the address of the area in the recording medium where the recording signal is written, the video resolution data Dvr, and the write address information Iwa. The address information generator 108d for outputting the specific address information Isa indicating the write address at the time when the video resolution change occurs, the video resolution data Dvr from the detector 107d and the specific address information Isa from the address information generator 108 And a VMG generator 110 for generating VMG information Dvmg, which is management information of VOB data.
[0150]
When there is a change in the video resolution of the audio video stream Sav, the VMG information Dvmg includes specific address information Isa indicating a write address at the time when the change in resolution occurs, as in the first embodiment. Become.
[0151]
Next, the operation will be described.
In the fourth embodiment, the broadcast signal Sbr from the antenna 101 is received by the broadcast receiver 102, and the audio video stream Sav from the receiver 102 is sent to the VOB composer 103 via a packer (not shown). In the VOB composer 103, the audio video stream Sav is converted into VOB data Dvob (see FIGS. 21 and 22) corresponding to the DVD recording standard format. The VOB data Dvob is converted into a recording signal Sre by the recording signal processor 104, and the recording signal Sre is written on the optical disk 106 by the recording head 105.
[0152]
Note that the operations of the receiver 102, VOB composer 103, recording signal processor 104, recording head 105, and packer (not shown) are exactly the same as those in the first embodiment.
[0153]
The video resolution detector 107d detects the video resolution based on the audio video stream Sav from the receiver 102, and outputs the video resolution data Dvr to the address information generator 108d and the VMG generator 110d.
[0154]
Also, in this recording apparatus 100d, the write address information Iwa of the data is generated by the system controller 111, and the address information generator 108d outputs and writes the detector 107d when the video resolution changes. Based on the address information Iwa, specific address information Isa indicating the write address at the time when the video resolution change occurs is output to the VMG generator 110d.
[0155]
The VMG generator 110d generates VMG information Dvmg, which is management information corresponding to each VOB, based on the video resolution data Dvr and the output of the address information generator 108d. The VMG information Dvmg is subjected to error correction code addition processing and recording modulation processing by the recording signal processor 104, and a recording signal Sre corresponding to the VMG information Dvmg is generated. This recording signal Sre is written on the optical disk 106 by the recording head 105.
[0156]
The recording signal Sre corresponding to the VMG information Dvmg is written in a predetermined recording area of the recording medium after the recording of the recording signal Sre corresponding to the VOB data Dvob on the recording medium is completed. At this time, the specific address information Isa is written as search information in a recording area corresponding to the VMGI information 10b1. Video resolution data Dvr is recorded in V_ATR 10d1 in VMG information 10a.
[0157]
As described above, in the recording device 100d of the fourth embodiment, the video resolution detector 107d that detects a change in video resolution, and the data write address at the time when the video resolution changes based on the detection output of the detector 107. Since the specific address information Isa is generated in the VMGI 10b1 constituting the management information (VMG information) 10a of each VOB, the specific address information Isa is generated on the optical disc 106. When playing back an audio / video stream, the VMG information 10a is read to recognize the recording position corresponding to the portion of the audio / video stream where the video resolution has changed. Sometimes video of the recorded stream It is possible to access the high speed to a position change of Zodo occurs.
[0158]
(Embodiment 5)
FIG. 5 is a block diagram for explaining a recording apparatus according to Embodiment 5 of the present invention.
The recording apparatus 100e according to the fifth embodiment performs the packing process in place of the packer (not shown) of the recording apparatus 100d according to the fourth embodiment, and changes the resolution when the video resolution changes. In order to prevent the previous stream and the stream after the resolution change from being included in one pack, the packer 112 for inserting padding data following the stream immediately before the resolution change in the pack being created, and the video resolution A padding size generator 113 that calculates the size of the padding data based on the data Dvr and the internal signal Sop in the packer 112 and outputs data (size data) Dps indicating the size to the packer 112; I have.
[0159]
The other configuration of the recording apparatus 100e according to the fifth embodiment is the same as that of the recording apparatus 100d according to the fourth embodiment.
Reference numeral 103b denotes a VOB composer in the recording apparatus 100e according to the fifth embodiment, and this VOB composer 103b is similar to the VOB composer 103 according to the fourth embodiment. Is converted to VOB data Dvob in accordance with the DVD recording standard format.
[0160]
Next, the operation will be described.
In the recording device 100e according to the fifth embodiment, the audio video stream Sav from the broadcast receiver 102 is divided by the packer 112 into data units (first data units) having a constant data size, and The PCK data Dpck corresponding to the data section (pack) is output to the VOB composer 103b. At this time, the audio stream is output as audio PCK data (audio pack) and the video stream is output as video PCK data (video pack) to the VOB composer 103b.
[0161]
Then, in the VOB composer 103b, a number of audio packs and video packs corresponding to a predetermined display time are collected as VOBU (third data unit), and the audio video input between the start of recording and the end of recording is recorded. VOB data Dvob composed of a plurality of VOBUs corresponding to the stream Sav is generated.
The VOB data Dvob is converted into a recording signal Sre by the recording signal processor 104 and recorded on the recording medium 106 by the optical head 105 based on the write address Iwa.
[0162]
The video resolution detector 107d outputs video resolution data Dvr by detecting the video resolution. Then, the address information generator 108 outputs specific address information Isa indicating the write address when the video resolution changes based on the video resolution data Dvr and the write address information Iwa.
[0163]
The padding size generator 113 receives the video resolution data Dvr and the internal signal Sop indicating the pack processing state in the packer 112, and when the video resolution changes, the padding data size is calculated and indicates the data size. Information (size information) Dps is output. Specifically, when a resolution change is detected in a state where the packer 112 stores a stream (that is, a video stream or an audio stream) in a predetermined pack, the free data size of the pack at this time is Calculated as the size of the padding data.
[0164]
When the data size information Dps is input to the packer 112, the vacant part of the pack at that time includes the padding data in place of the part of the stream after the position where the resolution change has occurred. The data amount indicated by the information Dps is inserted. As a result, even if a resolution change occurs during creation of a predetermined pack, the predetermined pack does not include stream data before the resolution change and a stream after the resolution change. In other words, when a resolution change occurs, the stream before the resolution change and the stream after the resolution change are stored in separate adjacent packs, and the stream data after the resolution change is stored in the predetermined pack. It will be stored from the beginning of the subsequent pack.
The other operations in the recording apparatus 100e are performed in the same manner as the recording apparatus 100d in the fourth embodiment, and the recording signal Sre corresponding to the VMG information Dvmg corresponding to each VOB is recorded on the recording medium 106.
[0165]
As described above, in the recording apparatus 100e of the fifth embodiment, instead of the packer of the fourth embodiment, when the video resolution changes, the packer 112 for inserting padding data into the pack, and the padding data described above. And a padding data is inserted in the pack being created in place of the stream after the resolution change when the resolution change occurs. Recording is performed so that the head of the subsequent stream matches the head of the pack.
[0166]
For this reason, when playing back an audio video stream recorded on the optical disc 106, the VMG information 10a is read out, so that the portion of the audio video stream in which the recording address is managed in pack units is changed. The corresponding recording position can be recognized, and at the time of reproduction of the audio video stream, it becomes possible to quickly access the recording position of the stream in which the video resolution changes on the optical disc.
[0167]
In the fifth embodiment, the predetermined position of the stream and the head position of the pack are matched by inserting padding data into the pack, but the predetermined position of the stream and the head position of the pack are The matching method is not limited to this, and for example, the size information of the pack data described in the pack header or the like may be changed.
[0168]
(Embodiment 6)
FIG. 6 is a block diagram for explaining a recording apparatus according to Embodiment 6 of the present invention.
The recording apparatus 100f of the sixth embodiment is based on the video resolution data Dvr from the video resolution detector 107d, instead of the address information generator 108d and the VMG generator 110d in the recording apparatus 100d of the fourth embodiment. A VMG generator 110f that generates VMG information Dvmg, which is VOB management information, is provided.
[0169]
Furthermore, when the video resolution changes based on the video resolution data Dvr instead of the VOB composer 103 in the recording device 100d, the recording device 100f includes a stream before the resolution change and a stream after the resolution change. A VOB composer 103f that generates VOB data is provided so as to be classified as separate VOB data.
The other configuration of the recording apparatus 100f according to the sixth embodiment is the same as that of the recording apparatus 100d according to the fourth embodiment.
[0170]
Next, the operation will be described.
In the sixth embodiment, when the broadcast signal Sbr from the antenna 101 is received by the broadcast receiver 102 and the audio video stream Sav from the receiver 102 is input to the VOB composer 103f and the video resolution detector 107d. In the VOB composer 103f, the audio video stream Sav is converted into VOB data Dvob (see FIGS. 21 and 22) according to the format of the DVD recording standard. The VOB data Dvob is converted into a recording signal Sre by the recording signal processor 104, and the recording signal Sre is written on the optical disk 106 by the recording head 105.
[0171]
The video resolution detector 107d detects the video resolution based on the audio video stream Sav, and outputs the video resolution data Dva to the VOB composer 103f and the VMG generator 110f.
The operations of the receiver 102, VOB composer 103f, recording signal processor 104, recording head 105, and video resolution detector 107d are exactly the same as those in the fourth embodiment.
[0172]
In the sixth embodiment, when the video resolution changes during recording of the audio video stream Sav, the VOB composer 103f uses different VOB data for the stream before the resolution change and the stream after the resolution change. Thus, VOB data Dvob corresponding to the audio video stream Sav is formed.
[0173]
The VMG generator 110 f generates VMG information Dvmg that is management information corresponding to the recorded VOB data, and the VMG information Dvmg is output to the recording signal processor 104. In the processor 104, the VMG information Dvmg is subjected to error correction code addition processing and recording modulation processing, and a recording signal Sre corresponding to the VMG information Dvmg is generated. The recording signal Sre is recorded on the optical disk 106 by the optical head 105.
[0174]
As shown in FIG. 18, the VMG information Dvmg includes video attribute information such as recording start address information, search information, video resolution information, and audio attribute information as management information corresponding to each VOB data. It is.
[0175]
As described above, in the recording device 100f of the sixth embodiment, when the video resolution changes, the VOB data forming the VOB data is divided so that the stream before the resolution change and the stream after the resolution change are separated as separate VOB data. Since the composer 103f is provided, the video resolution can be unified for one VOB data. As a result, when the recording signal recorded on the optical disk 106 is reproduced, it is possible to easily perform the decoding process on each VOB data based on the video resolution managed in each VOB unit.
Further, by reading out the VMG information Dvmg, it becomes possible to quickly access a recording position where a change in video resolution occurs in the stream recorded on the optical disc when the audio video stream is reproduced.
[0176]
(Embodiment 7)
FIG. 7 is a block diagram for explaining a recording apparatus according to Embodiment 7 of the present invention.
The recording apparatus 100g according to the seventh embodiment receives the audio video stream Sav instead of the video resolution detector 107d and the address information generator 108d in the recording apparatus 100d according to the fourth embodiment, and receives the video stream included therein. By analyzing the header information, the aspect ratio corresponding to the video stream is detected, the aspect ratio detector 107g for outputting the data Dar indicating the aspect ratio, the output Dar of the detector 107g and the write address from the system controller 111 An address information generator 108g for generating specific address information Isa indicating a write address at the time when the aspect ratio changes based on the information Iwa, and the VMG generator 110 receives the specific address information Isa and the aspect ratio data Dar. Output As it is those that you configured. Other configurations are the same as those of the recording apparatus 100d of the fourth embodiment.
[0177]
Here, the aspect ratio detector 107g is specifically configured to detect a value such as 16: 9 or 4: 3, a letterbox type, and the like as the aspect ratio.
[0178]
Next, the operation will be described.
In the seventh embodiment, as in the fourth embodiment, the broadcast signal Sbr is received by the broadcast receiver 102, and the audio video stream Sav output from the receiver 102 is passed through a packer (not shown). And output to the VOB composer 103. Further, the VOP data Dvob from the VOP composer 103 is converted into a recording signal Sre by the recording signal processor 104, and the recording signal Sre is recorded on the optical disk 106 by the optical head 105. The operations of the receiver 102, the packer (not shown), the VOB composer 103, the recording signal processor 104, and the recording head 105 are exactly the same as those in the fourth embodiment.
[0179]
In the seventh embodiment, the aspect ratio detector 107g detects the aspect ratio data Dar indicating the aspect ratio of the video image by analyzing the header of the video stream included in the audio video stream Sav, and the aspect ratio is detected. The data Dar is output to the address information generator 108g and the VMG generator 110d.
[0180]
In the address information generator 108g, when the aspect ratio changes, the address indicating the write address at the time when the aspect ratio change occurs based on the output Sar of the detector 107g and the write address information Iwa from the system controller 111. Address information Isa is output to the VMG generator 110d.
[0181]
The VMG generator 110d generates VMG information Dvmg, which is management information corresponding to each VOB, based on the output Dar of the aspect ratio detector 107g and the output Isa of the address information generator 108g. The VMG information Dvmg is subjected to error correction code addition processing and recording modulation processing by the recording signal processor 104, and a recording signal Sre corresponding to the VMG information Dvmg is generated. This recording signal Sre is written on the optical disk 106 by the recording head 105.
[0182]
The recording signal Sre corresponding to the VMG information Dvmg is written in a predetermined recording area of the recording medium after the recording of the recording signal Sre corresponding to the VOB data Dvob on the recording medium is completed. At this time, the specific address information Isa is written as search information in a recording area corresponding to the VMGI information 10b1. The aspect ratio data Dar is recorded in V_ATR 10d1 in the VMG information 10a.
[0183]
As described above, in the recording device 100g according to the seventh embodiment, the aspect ratio detector 107g for detecting the aspect ratio data Dar of the video image based on the audio video stream Sav and the aspect ratio data Dar from the detector 107g. And the address information generator 108g for generating the specific address information Isa indicating the data write address at the time when the aspect ratio changes, and the management information (VMG information) 10a of each VOB is stored in the specific address information Isa. Since the recording is performed in the recording area of the optical disk 106 corresponding to the configured VMGI 10b1, when reproducing the audio video stream recorded on the optical disk 106, the aspect information in the audio video stream is read by reading the VMG information 10a. Ratio is able to recognize the recording position changes, during reproduction of the audio video stream, the stream recorded on the optical disk, it is possible to access the high speed position the aspect ratio is changed.
[0184]
(Embodiment 8)
FIG. 8 is a block diagram for explaining a recording apparatus according to an eighth embodiment of the present invention.
The recording apparatus 100h according to the eighth embodiment receives the audio video stream Sav instead of the video resolution detector 107d and the address information generator 108d in the recording apparatus 100e according to the fifth embodiment, and receives the video stream contained therein. An aspect ratio detector 107g that detects an aspect ratio corresponding to the video stream by analyzing header information and outputs data Dar indicating the aspect ratio, an output Dar of the detector 107g, and write address information from the system controller 111 An address information generator 108g for generating specific address information Isa indicating a write address at the time when the aspect ratio changes based on Iwa, and the specific address information Isa and the aspect ratio data Dar to the VMG generator 110. Above a Is obtained by configured to output Baek preparative ratio data Dar to the packed 112 and the padding size generator 113. Other configurations are the same as those of the recording apparatus 100e of the fifth embodiment.
[0185]
Here, the aspect ratio detector 107g is configured to detect a value such as 16: 9 or 4: 3, a type of letterbox, and the like as the aspect ratio, as in the seventh embodiment.
[0186]
Next, the operation will be described.
In the recording apparatus 100h according to the eighth embodiment, the audio video stream Sav from the broadcast receiver 102 is divided into data units (packs) having a fixed data size by the packer 112 and corresponds to each pack. Data Dpck is output to the VOB composer 103b. Then, in the VOB composer 103b, a number of PCK data Dpck corresponding to a predetermined display time are collected as one data unit, VOBU, and the audio video stream Sav input from the start of recording to the end of recording is recorded. Corresponding VOB data Dvob composed of a plurality of VOBUs is generated.
[0187]
The VOB data Dvob is converted into a recording signal Sre by the recording signal processor 104 and recorded on the recording medium 106 by the optical head 105.
The aspect ratio detector 107g detects the aspect ratio data Dar and outputs the aspect ratio data Dar to the address information generator 108g, the padding size generator 113, and the packer 112.
[0188]
Based on the aspect ratio data Dar and the write address information Iwa from the system controller 111, the address information generator 108g outputs specific address information Isa indicating the write address when the aspect ratio changes.
[0189]
Further, when the aspect ratio changes, the padding size generator 113 calculates the size of padding data based on the internal signal Sop indicating the pack processing state in the packer 112, and information Dps indicating the data size is obtained. Is output. Specifically, when a change in the aspect ratio is detected based on the aspect ratio data Dar in a state where a stream is stored in a predetermined pack, the free data size of the pack at this time is the size of the padding data. Is calculated as
[0190]
Then, when the data size information Dps is input to the packer 112, the empty portion of the pack at that time is padded with padding data instead of the portion after the position where the aspect ratio change has occurred in the stream. The data amount indicated by the data size information Dps is inserted. As a result, even if the aspect ratio changes during creation of the predetermined pack, it is possible to prevent the predetermined pack from containing stream data before the aspect ratio change and stream data after the aspect ratio change. In other words, when the aspect ratio change occurs, the stream before the aspect ratio change and the stream after the aspect ratio change are stored in separate adjacent packs. The stream data after the aspect ratio change from the beginning is stored.
[0191]
The other operations in the recording apparatus 100e are performed in the same manner as the recording apparatus 100e of the fifth embodiment, and the recording signal Sre corresponding to the VMG information Dvmg corresponding to each VOB is recorded on the recording medium 106.
[0192]
The recording signal Sre corresponding to the VMG information Dvmg is written in a predetermined recording area of the recording medium after the recording of the recording signal Sre corresponding to the VOB data Dvob on the recording medium is completed. At this time, the specific address information Isa is written as search information in a recording area corresponding to the VMGI information 10b1. The aspect ratio data Dar is recorded in V_ATR 10d1 in the VMG information 10a.
[0193]
As described above, the recording apparatus 100h according to the eighth embodiment includes the packer 112 that divides the audio video stream Sav into data units having a constant data size by the packing process, and generates the change when the aspect ratio changes. In the middle pack, padding data is inserted instead of the stream after the aspect ratio change, so the stream is recorded so that the head of the stream after the aspect ratio change coincides with the head of the pack. .
[0194]
For this reason, when playing back an audio video stream recorded on the optical disk 106, the VMG information 10a is read out so that the aspect ratio of the audio video stream whose recording address is managed in pack units is changed. The corresponding recording position can be recognized, and at the time of reproduction of the audio video stream, it becomes possible to access the recording position of the stream in which the aspect ratio changes on the optical disc at high speed.
[0195]
In the eighth embodiment, the predetermined position of the stream and the head position of the pack are made to coincide by inserting padding data into the pack, but the predetermined position of the stream and the head position of the pack are The matching method is not limited to this, and for example, the size information of the pack data described in the pack header or the like may be changed.
[0196]
(Embodiment 9)
FIG. 9 is a block diagram for explaining a recording apparatus according to Embodiment 9 of the present invention.
The recording apparatus 100i according to the ninth embodiment receives the audio video stream Sav instead of the video resolution detector 107d in the recording apparatus 100f according to the sixth embodiment, and analyzes the header information of the video stream included in the audio video stream Sav. An aspect ratio detector 107g for detecting an aspect ratio corresponding to the video stream and outputting data Dar indicating the aspect ratio is provided, and the aspect ratio data Dar is output to the VOP composer 103f and the VMG generator 110f. It is a thing. Other configurations are the same as those of the recording apparatus 100f according to the sixth embodiment.
Here, the aspect ratio detector 107g is specifically configured to detect a value such as 16: 9 or 4: 3, a letterbox type, and the like as the aspect ratio.
[0197]
Next, the operation will be described.
In the recording apparatus 100i of the ninth embodiment, the broadcast signal Sbr is received by the broadcast receiver 102, and the audio video stream Sav output from the receiver 102 is composed of a VOB through a packer (not shown). Is output to the device 103. Further, the VOP data Dvob from the VOP composer 103 is converted into a recording signal Sre by the recording signal processor 104, and the recording signal Sre is recorded on the optical disk 106 by the optical head 105. The operations of the receiver 102, the packer (not shown), the VOB composer 103, the recording signal processor 104, and the recording head 105 are exactly the same as those in the sixth embodiment.
[0198]
In the ninth embodiment, the aspect ratio detector 107g detects the aspect ratio data Dar indicating the aspect ratio of the video image by analyzing the header of the video stream included in the audio video stream Sav, and the aspect ratio is detected. The data Dar is output to the VOP composer 103f and the VMG generator 110f.
[0199]
In the VOB composer 103f, when the aspect ratio changes during recording of the audio video stream Sav, the audio video stream so that the stream before the aspect ratio change and the stream after the aspect ratio change become separate VOB data. VOB data Dvob corresponding to Sav is configured.
[0200]
The VMG generator 110 f generates VMG information Dvmg that is management information of the recorded VOB data, and the VMG information Dvmg is output to the recording signal processor 104. In the processor 104, the VMG information Dvmg is subjected to error correction code addition processing and recording modulation processing, and a recording signal Sre corresponding to the VMG information Dvmg is generated. The recording signal Sre is recorded on the optical disk 106 by the optical head 105.
[0201]
As shown in FIG. 18, the VMG information Dvmg includes recording start address information, search information, video attribute information, and audio attribute information as management information corresponding to each VOB data.
[0202]
As described above, in the recording apparatus 100i of the ninth embodiment, when the aspect ratio changes as a VOB composer that converts the audio video stream Sav into VOB data in accordance with the DVD recording standard format, Since the VOB composer 103f that classifies the changed stream as separate VOB data is provided, the aspect ratio can be unified with respect to one VOB data. Thereby, when reproducing the recording signal recorded on the optical disc 106, it becomes possible to easily perform the decoding process for each VOB data based on the aspect ratio managed in each VOB unit.
[0203]
Further, by reading out the VMG information Dvmg, it becomes possible to access at high speed the position where the aspect ratio of the stream recorded on the optical disc is changing when the audio video stream is reproduced.
[0204]
In the first to ninth embodiments, the case where the broadcast signal input to the recording device is a digital broadcast signal has been described. However, the broadcast signal input to the recording device is not limited to a digital broadcast signal, and may be an analog television. It may be a signal.
[0205]
In this case, video resolution, aspect ratio, other information about video attributes, and information about audio attributes are detected based on information superimposed on the vertical blanking period.
[0206]
In the first to ninth embodiments, the output of the receiver 102 that receives the broadcast signal is converted into data according to the DVD recording standard and recorded. An encoding / compression unit that performs compression encoding processing may be provided, and an output of the encoding / compression unit may be converted into data in accordance with a DVD recording standard and recorded.
[0207]
Further, in the first to ninth embodiments, the information about the recording address of the change point of the video attribute or the audio attribute such as the video resolution and the aspect ratio is recorded as the VMG information which is the management information corresponding to each VOP. However, the information regarding the change point of the video attribute or the audio attribute is not limited to the address information, and the recording time at the time of the attribute change based on the recording start time may be recorded as VMG information.
[0208]
In this case, in order to access the recording data corresponding to the predetermined recording time at high speed, information indicating a time map table for associating the recording time with the recording address is held, and the recording time is recorded according to the time map table. What is necessary is just to convert into an address and access the recording information corresponding to the obtained recording address.
[0209]
(Embodiment 10)
FIG. 10 is a block diagram for explaining an encoding apparatus according to Embodiment 10 of the present invention.
The encoding apparatus 100j according to the tenth embodiment is an apparatus that encodes a video signal included in an audio video signal based on a video attribute and an audio attribute.
[0210]
That is, the encoding apparatus 100j performs an intra-frame encoding process on the video signal Svi to generate the first encoded data Ev1, and an inter-frame encoding process on the video signal Svi. And an inter-frame encoder 122b for generating the second encoded data Ev2.
[0211]
Here, the intra-frame encoder 122a performs the encoding process independently using only the information in the frame for the video signal Svi of the frame to be processed. For example, in the MPEG encoding method, I frame encoding processing is performed. The inter-frame encoder 122b also uses inter-frame prediction encoding that uses image information of processed frames other than the target frame as image information of the reference frame for the video signal Svi corresponding to the target frame to be processed. For example, P frame or B frame encoding processing in the MPEG encoding system is performed.
[0212]
The encoding device 100j includes an input-side switch 121 that supplies the video signal Svi to one of the encoders 122a and 122b based on the control signal Scnt, and the first and second encoded data Ev1. And Ev2 are selected based on the control signal Scnt, and an output side switch 123 is provided for outputting the selected encoded data as a video stream Dstr.
[0213]
Here, the input side switch 121 includes an input terminal 121a to which the video signal Svi is input, a first output terminal 121b for supplying the video signal Svi to the intra-frame encoder 122a, and the video signal. A second output terminal 121c for supplying Svi to the interframe encoder 122b, and based on the switch control signal Scnt, the connection state of the input terminal 121a and the first output terminal 121b; The connection state between the input terminal 121a and the second output terminal 121c is switched. The output-side switch 123 includes a first input terminal 123a to which the first encoded data Ev1 is input, a second input terminal 123b to which the second encoded data Ev2 is input, and the above And an output terminal 123c for outputting the video stream Dstr. Based on the switch control signal Scnt, the connection state of the first input terminal 123a and the output terminal 123c, the second input terminal 121b, and the output The connection state of the terminal 123c is switched.
[0214]
Further, the encoding device 100j detects a video attribute based on the video signal Svi included in the audio video signal, and outputs a video attribute data Dva, and an audio included in the audio video signal. An audio attribute detector 125 that detects an audio attribute based on the signal Sau and outputs audio attribute data Daa.
[0215]
The encoding device 100j includes an encoding controller 126 that outputs the switch control signal Scnt to the switches 121 and 123 based on the video attribute data Dva and the audio attribute data Daa, and the video attribute data Dva and audio. A prediction mode controller 127 that outputs an encoding control signal Pcnt for controlling the inter-frame encoding process to the inter-frame encoder 122b based on the attribute data Daa.
[0216]
Here, in the state where there is no change in the video attribute or the audio attribute, the encoding controller 126 performs the intra-frame encoding process and the inter-frame encoding process periodically as shown in FIG. The input side and output side switches 121 and 123 are controlled to form a GOP consisting of a certain number of frames. On the other hand, when the video attribute or the audio attribute changes, the intra-frame encoding process and the inter-frame encoding process are performed. The input and output switches 121 and 123 are controlled so that the start of the stream after the change of the video attribute and the change of the audio attribute is matched with the start of the stream constituting the GOP. It has become.
[0217]
Further, the prediction mode controller 127 performs a process of using two frames positioned before and after the B frame as reference frames as an encoding process for the B frame when there is no change in the video attribute or the audio attribute. As described above, when the inter-frame encoder 122b is controlled and the video attribute or the audio attribute changes, the encoding process for the B frame is a process having a video attribute or an audio attribute different from that of the specific GOP to which the processing target frame belongs. The inter-frame encoder 122b is controlled so that a frame belonging to a completed GOP is not used as a reference frame. Here, the processed GOP is obtained by performing the encoding process for each frame before the specific GOP.
[0218]
As a method of setting the frame immediately before the video attribute change point as the last frame of the GOP, the last few frames of the GOP are encoded as the P frame or the I frame, thereby performing the encoding process continuously. A method of adjusting the type can be considered.
[0219]
Next, the operation will be described.
When an audio / video signal is input to the encoding apparatus 100j according to the tenth embodiment, the video signal Svi corresponding to each frame included in the audio / video signal is converted into an intra-frame encoder via the input-side switch 121. 122a and one of the interframe encoders 122b.
[0220]
In the intra-frame encoder 122a, the video signal Svi of the target frame is subjected to an encoding process that does not refer to image information of other frames, and the first encoded data (intra encoded data) is obtained by the encoding process. ) Ev1 is generated. That is, in the intra-frame encoder 122a, the video signal is independently encoded using only the image information in the target frame. Specifically, the encoding process for the I frame in the MPEG encoding method is performed. Is done. On the other hand, in the inter-frame encoder 122b, an encoding process referring to image information of another frame is performed on the video signal Svi of the target frame, and the second encoded data (inter code) is obtained by the encoding process. Data) Ev2 is generated. That is, in the inter-frame encoder 122b, the inter-frame prediction encoding process using the image information of the predetermined frame as the image information of the reference frame is performed on the video signal Svi of the target frame. Specifically, an encoding process for a P frame or a B frame in the MPEG encoding method is performed.
[0221]
The encoded data generated by each encoder is output as a video stream Dstr via the output side switch 123a.
The video attribute detector 124 detects the video attribute of the video signal Svi included in the input audio video signal, and outputs the video attribute data Dva to the encoding controller 126 and the prediction mode controller 127. The audio attribute detector 125 detects the audio attribute of the audio signal Sau included in the input audio video signal, and outputs the audio attribute data Dau to the encoding controller 126 and the prediction mode controller 127.
[0222]
The encoding controller 126 outputs a control signal Scnt to the input side and output side switches 121 and 123 based on the video attribute data Dva and the audio attribute data Daa. Switching control is performed so that either the intra-frame encoding process or the inter-frame encoding process is performed on the video signal Svi of the target frame.
[0223]
For example, when there is no change in the video attribute or the audio attribute, the switches 121 and 123 are controlled so that the intra-frame encoding process and the inter-frame encoding process are periodically performed as shown in FIG. Thus, a GOP composed of a certain number of frames is formed. On the other hand, when the video attribute or the audio attribute changes, the GOP is configured with the start of the stream after the change of the video attribute or the change of the audio attribute regardless of the cycle in which the intra-frame encoding process and the inter-frame encoding process are performed Both switches 121 and 123 are controlled so that the head of the stream to be matched matches.
[0224]
Further, in the state where the video attribute or the audio attribute is not changed, the prediction mode controller 127 performs a process of using two frames positioned before and after the B frame as reference frames as an encoding process for the B frame. Control is performed on the interframe encoder 122b. On the other hand, when the video attribute or the audio attribute is changed, as a coding process for the B frame, a frame belonging to a processed GOP having a video attribute or an audio attribute different from the specific GOP to which the processing target frame belongs is used as a reference frame. The inter-frame encoder 122b is controlled so that there is no error.
[0225]
As described above, in the encoding device 100j according to the tenth embodiment, any one of the intra-frame encoding process and the inter-frame encoding process is performed on the video signal Svi of each frame based on the video attribute data Dva and the audio attribute data Daa. An encoding controller 126 that controls whether to perform processing, and a prediction mode controller 127 that controls a prediction mode in the inter-frame encoding processing based on the attribute data Dva and Daa, and the video attribute and the audio attribute change. In this case, a frame belonging to a GOP having a different attribute from the GOP to which the processing target frame belongs and the head of the stream after the attribute change coincides with the head of the stream constituting the GOP is not used as a reference frame. As a result, video attributes such as the encoding method, video resolution, and video aspect ratio have changed. The video signal to be converted can be encoded according to an encoding method such as MPEG.
[0226]
That is, in encoding apparatus 100j of the tenth embodiment, even when the video attribute or the audio attribute changes, the stream of the first frame after the attribute change matches the stream of the first frame of the GOP. Can be easily accessed to the video attribute change point and the audio attribute change point of the video stream recorded on the recording medium as an access unit.
[0227]
In addition, by prohibiting the use of a GOP frame having a video attribute or audio attribute different from that of the target frame as a reference frame for the target frame, it is independent of the GOP before and after the change point of the video attribute and the audio attribute. Thus, even if the video attribute or the audio attribute changes, the encoding process and the decoding process can be executed without breaking down.
[0228]
(Embodiment 11)
FIG. 11 is a block diagram for explaining an encoding apparatus according to Embodiment 11 of the present invention.
In addition to the configuration of the encoding device 100j of the tenth embodiment, the encoding device 100k according to the eleventh embodiment adds video output from the output side switch based on the video attribute data Dva and the audio attribute data Daa. A packer 128 that performs a packing process on the stream Dstr and outputs a packed video stream Dpck is provided. Here, the packing process is a process of dividing the video stream into data units (packs) of a predetermined size.
[0229]
The packer 128 divides the video stream into data units (packs) of a predetermined size by a packing process for the video stream in a state where the video attribute or the audio attribute has not changed. When the attribute or the audio attribute changes, the packing process is performed so that the head of the stream after the change of the video attribute and the audio attribute matches the head of the stream stored in the pack.
[0230]
Specifically, when the attribute change occurs when the stream is stored in a predetermined pack, the packer 128 stores predetermined padding data in the pack instead of the stream after the attribute change. Is supposed to be inserted. When an attribute change occurs, the method for including only streams with the same attribute in the pack is limited to a method of inserting predetermined padding data instead of the stream after the attribute change as described above. For example, when the attribute change occurs, the pack size in the header information of this pack may be changed so that the stream after the attribute change is not included in the pack following the stream before the attribute change. Good.
Other configurations are the same as those of the encoding device 100j according to the tenth embodiment.
[0231]
Next, the function and effect will be described.
In the encoding device 100k of the eleventh embodiment, as in the encoding device 100j of the tenth embodiment, when the video attribute or the audio attribute changes, the stream of the first frame after the attribute change and the first frame of the GOP are changed. The encoding process is performed on the video signal so that the stream matches.
[0232]
In the packer 128, the packing process for dividing the video stream into packs of a predetermined size is performed so that the change point of the video attribute or the audio attribute of the stream coincides with the head of the pack. Specifically, when the attribute change occurs while a stream is stored in a predetermined pack, predetermined padding data is inserted into the pack instead of the stream after the attribute change.
[0233]
As described above, in the encoding device 100k of the eleventh embodiment, in addition to the configuration of the tenth embodiment, when the attribute change occurs in the state where the stream is stored in the predetermined pack, the pack includes Since the packer 128 for inserting predetermined padding data is provided instead of the stream after the attribute change, the video resolution or the like is applied to the pack data Dpck recorded on the recording medium by performing address management in pack units. It is possible to perform high-speed access to the video attribute change point.
[0234]
(Embodiment 12)
FIG. 12 is a block diagram for explaining an encoding apparatus according to Embodiment 12 of the present invention.
The encoding apparatus 100m according to the twelfth embodiment is based on the video signal Svi included in the audio video signal, instead of the video attribute detector 124 and the audio attribute detector 125 of the encoding apparatus 100j according to the tenth embodiment. A video resolution detector 129 for detecting the video resolution and outputting the video resolution data Dvr. The video resolution detector 129 is configured to detect at least one of a horizontal screen size, a vertical screen size, and a frame frequency as the video resolution, similarly to the video resolution detector 107d of the fourth embodiment. The video resolution detector 129 may be configured to detect whether the video signal is an interlace signal or a progressive signal as the video resolution.
[0235]
Further, the coding apparatus 100m of the twelfth embodiment replaces the coding controller 126 and the prediction mode controller 127 of the coding apparatus 100j of the tenth embodiment with a switch control signal based on the video resolution data Dvr. An encoding controller 126m for controlling the switches 121 and 123 by Scnt, and a prediction mode controller 127m for controlling the interframe encoder 122b by an encoding control signal Pcnt based on the video resolution data Dvr. It is a thing.
[0236]
Here, the encoding controller 126m switches the switches 121 and 123 so that the intra-frame encoding process and the inter-frame encoding process are periodically performed as shown in FIG. On the other hand, when the video resolution changes, the cycle in which the intra-frame encoding process and the inter-frame encoding process are performed is changed, and the head of the stream after the video resolution change and the stream constituting the GOP are changed. The switches 121 and 123 are controlled so that the heads coincide with each other.
[0237]
In addition, the prediction mode controller 127m performs the above-described process so that, when there is no change in the video resolution, a process using two frames positioned before and after the B frame as a reference frame is performed as an encoding process for the B frame. When the inter-coder 122b is controlled and the video resolution changes, as a coding process for the B frame, a frame belonging to a processed GOP having a video resolution different from the specific GOP to which the processing target frame belongs is used as a reference frame. The inter-frame encoder 122b is controlled so as not to be used.
Other configurations are the same as those of the encoding device 100j according to the tenth embodiment.
[0238]
Next, the operation will be described.
FIG. 13 shows a television signal (video signal) input to the encoding device 100m of the twelfth embodiment.
Here, the video signal up to frame F (j-3) is a high-vision signal, and the video signal after frame F (j-2) is a standard television signal. That is, the frame F (j-2) is a frame corresponding to the position where the video resolution has changed in the video signal. In FIG. 13, F (j-5) and F (j-4) are frames corresponding to high-definition signals, and F (j-1) to F (j + 9) are frames corresponding to high-definition signals.
[0239]
When the video signal shown in FIG. 13 is input to the encoding device 100m, the video signal is sent to one of the intra-frame encoder 122a and the inter-frame encoder 122b according to the change in the video resolution and the encoding mode. Is subjected to encoding processing, and a video stream Dstr obtained by the encoding processing is output. Note that the encoding mode is information indicating whether an I frame, a P frame, or a B frame is to be encoded with respect to each frame based on a video signal.
[0240]
Hereinafter, operations of the video resolution detector 129, the encoding controller 126m, and the prediction mode controller 127m when the video signal shown in FIG. 13 is input to the encoding device 100m will be briefly described.
The video resolution detector 129 detects the video resolution based on the video signal Svi input to the encoding device 100m, and outputs the video resolution data Dvr to the encoding controller 126m and the prediction mode controller 127m.
[0241]
Then, in the encoding controller 126m, the switches 121 and 123 are configured so that one GOP is completed in the frame F (j-3) and a new GOP is formed from the next frame F (j-2). Control to switch between is performed. As a result, all the frames constituting one GOP have the same video resolution, and frames having different video resolutions are not mixed in one GOP.
Further, in the prediction mode controller 127m, in the inter-frame encoding process for the B frames F (j-2) and F (j-1), the I frame F (j) is used as a reference frame. Control is performed on the inter-coder 122b.
[0242]
As described above, in the encoding device 100m of the twelfth embodiment, the video resolution detector 129 that detects the video resolution based on the video signal, and the video signal Svi of each frame based on the video resolution data Dvr are included in the frame. An encoding controller 126m that controls which of the encoding process and the inter-frame encoding process is performed, and a prediction mode controller 127 that controls a prediction mode in the inter-frame encoding process based on the video resolution data Dvr. The GOP is separated at the video resolution change point, and the GOP having the frame corresponding to the video resolution change point as the first frame is encoded without referring to the immediately preceding GOP frame. Since it is assumed that processing has been performed, a video signal whose video resolution changes can be It may be encoded according to the encoding scheme.
[0243]
That is, in the encoding device 100m of the twelfth embodiment, even when the video resolution changes, the first frame stream after the resolution change matches the first frame stream of the GOP. As described above, the video resolution change point of the video stream recorded on the recording medium can be easily accessed.
[0244]
In addition, by prohibiting the use of a GOP frame having a video resolution different from the video resolution of the target frame as a reference frame for the target frame, the GOP before and after the change point of the video resolution can be independently encoded. Decoding processing can be performed, and even if the video resolution changes, the encoding processing and decoding processing can be executed without breaking down.
[0245]
In the twelfth embodiment, the first frame of the first GOP (specific GOP) after the change in video resolution is a B frame, but the first frame of the specific GOP may be an I frame. As described above, by setting the first frame of a specific GOP as an I frame, a GOP frame having a video resolution different from that of the specific GOP is not used as a reference frame in the inter-frame encoding process for the specific GOP. Become.
[0246]
In addition, in order to make the frame immediately before the change of the video resolution coincide with the last frame of the GOP immediately before the specific GOP (immediately before GOP), an encoding process in which the last few frames of the immediately preceding GOP are P frames or I frames By continuously performing the above, the type of each frame may be adjusted.
[0247]
In Embodiment 12, the encoding process is performed by using two frames between adjacent I frames and P frames and between two adjacent P frames as B frames. The number of B frames is as follows. For example, the B frame may not exist.
[0248]
(Embodiment 13)
FIG. 14 is a block diagram for explaining an encoding apparatus according to Embodiment 13 of the present invention.
In addition to the configuration of the encoding device 100m of the twelfth embodiment, the encoding device 100n of the thirteenth embodiment applies a video stream Dstr output from the output side switch based on the video resolution data Dvr. It is provided with a packer 128n that performs a packing process and outputs a packed video stream Dpck. Here, the packing process is a process of dividing the video stream into data units (packs) of a predetermined size.
[0249]
The packer 128n receives the video resolution data Dvr instead of the video attribute data Dva and the audio attribute data Daa which are input signals in the packer 128 of the eleventh embodiment. Other configurations are the same as those of the packer 128 of the eleventh embodiment.
[0250]
In other words, the packer 128n divides the video stream into data units (packs) of a predetermined size by the packing process for the video stream in a state where the video resolution does not change. Is changed, the above-described packing process is performed so that the head of the stream after the change in video resolution matches the head of the stream stored in the pack.
[0251]
Specifically, when the resolution change occurs in a state where a stream is stored in a predetermined pack, the packer 128 stores predetermined padding data in the pack instead of the stream after the resolution change. Is supposed to be inserted.
Other configurations of the thirteenth embodiment are the same as those of the encoding device 100m of the twelfth embodiment.
[0252]
Next, the function and effect will be described.
In the encoding device 100n according to the thirteenth embodiment, similarly to the encoding device 100m according to the twelfth embodiment, when the video resolution changes, the first frame stream after the resolution change and the first frame stream of the GOP are separated. Encoding processing is performed on the video signal so as to match.
[0253]
In the packer 128n, the packing process for dividing the video stream into packs of a predetermined size is performed so that the change point of the video resolution of the stream coincides with the head of the pack. Specifically, when the video resolution change occurs while a stream is stored in a predetermined pack, predetermined padding data is inserted into the pack instead of the stream after the resolution change.
[0254]
As described above, in the encoding device 100n of the thirteenth embodiment, in addition to the configuration of the twelfth embodiment, when the video resolution change occurs in the state where the stream is stored in the predetermined pack, Is provided with a packer 128n for inserting predetermined padding data in place of the stream after the resolution change, so that video data is recorded on the packed data Dpck recorded on the recording medium by performing address management in units of packs. It becomes possible to perform high-speed access to the resolution change point.
[0255]
(Embodiment 14)
FIG. 15 is a block diagram for explaining an encoding apparatus according to Embodiment 14 of the present invention.
The encoding apparatus 100p according to the fourteenth embodiment is based on the video signal Svi included in the audio video signal, instead of the video attribute detector 124 and the audio attribute detector 125 of the encoding apparatus 100j according to the tenth embodiment. And an aspect ratio detector 130 for detecting the video aspect ratio and outputting the aspect ratio data Dar. The aspect ratio detector 130 detects by reading the aspect ratio information embedded in the vertical blanking period of the video signal. Further, the aspect ratio detector 130 detects the aspect ratio value (16: 9 or 4: 3), letterbox information, and the like as the aspect ratio detector 107g of the seventh embodiment. .
[0256]
Furthermore, the encoding device 100n according to the fourteenth embodiment replaces the encoding controller 126 and the prediction mode controller 127 of the encoding device 100j according to the tenth embodiment with a switch control signal based on the aspect ratio data Dar. An encoding controller 126p that controls the switches 121 and 123 by Scnt and a prediction mode controller 127p that controls the interframe encoder 122b by an encoding control signal Pcnt based on the aspect ratio data Dar. It is a thing.
[0257]
Here, the encoding controller 126p switches the switches 121 and 123 so that the intra-frame encoding process and the inter-frame encoding process are periodically performed as shown in FIG. On the other hand, when the aspect ratio changes, the cycle in which the intra-frame encoding process and the inter-frame encoding process are performed is changed, and the head of the stream after the aspect ratio change and the stream constituting the GOP are changed. The switches 121 and 123 are controlled so that the heads coincide with each other.
[0258]
In addition, the prediction mode controller 127p performs the above-described frame processing so that the two frames positioned before and after the B frame are used as the reference frame as the encoding process for the B frame in a state where the aspect ratio does not change. When the inter-coder 122b is controlled and the aspect ratio changes, as a coding process for the B frame, a frame belonging to a processed GOP having a video resolution different from that of the specific GOP to which the processing target frame belongs is used as a reference frame. The inter-frame encoder 122b is controlled so as not to be used.
Other configurations are the same as those of the encoding device 100j according to the tenth embodiment.
[0259]
Next, the operation will be described.
When the video signal Svi is input to the coding apparatus 100p according to the fourteenth embodiment, the video signal is received by one of the intraframe encoder 122a and the interframe encoder 122b in accordance with the change in the aspect ratio. An encoding process is performed, and a video stream Dstr obtained by the encoding process is output.
That is, the aspect ratio detector 130 detects the aspect ratio based on the video signal Svi input to the encoding device 100p, and outputs the aspect ratio data Dar to the encoding controller 126p and the prediction mode controller 127p. The
[0260]
Then, the encoding controller 126p performs control to switch the switches 121 and 123 so that one GOP is completed in the frame immediately before the aspect ratio change and a new GOP is formed from the next frame. . As a result, all frames constituting one GOP have the same aspect ratio, and frames having different aspect ratios are not mixed in one GOP.
[0261]
Further, the prediction mode controller 127p controls the inter-frame encoder 122b so that a frame with a GOP whose aspect ratio is different from the aspect ratio of the target frame is not used as a reference frame for the target frame.
[0262]
As described above, in the encoding device 100p according to the fourteenth embodiment, the video resolution detector 130 that detects the aspect ratio based on the video signal, and the video signal Svi of each frame based on the aspect ratio data Dar are included in the frame. An encoding controller 126p that controls which of the encoding process and the inter-frame encoding process is performed, and a prediction mode controller 127 that controls a prediction mode in the inter-frame encoding process based on the aspect ratio data Dar. The GOP is separated at the aspect ratio change point, and the GOP having the frame corresponding to the aspect ratio change point as the first frame is encoded without referring to the immediately preceding GOP frame. Since the processing is assumed to have been performed, the aspect ratio changes. The Deo signal may be encoded according to the encoding scheme such as MPEG.
[0263]
That is, in the encoding device 100p according to the fourteenth embodiment, even when the aspect ratio changes, the first frame stream after the aspect ratio change matches the first frame stream of the GOP. It becomes possible to easily access the aspect ratio change point of the video stream recorded on the recording medium as a unit.
[0264]
In addition, by prohibiting the use of a GOP frame having an aspect ratio different from the aspect ratio of the target frame as a reference frame for the target frame, the GOP before and after the change point of the aspect ratio can be independently encoded. The decoding process can be performed effectively, and even if the aspect ratio changes, the encoding process and the decoding process can be executed without breaking down.
[0265]
In the fourteenth embodiment, the first frame of the first GOP (specific GOP) after the aspect ratio has changed is a B frame, but the first frame of this specific GOP may be an I frame. As described above, by setting the first frame of a specific GOP as an I frame, a GOP frame having an aspect ratio different from that of the specific GOP is not used as a reference frame in the interframe coding process for the specific GOP. Become.
[0266]
Also, in order to make the frame immediately before the change of the aspect ratio coincide with the last frame of the GOP immediately before the specific GOP (immediately before GOP), an encoding process in which the last few frames of the immediately preceding GOP are P frames or I frames. By continuously performing the above, the type of each frame may be adjusted.
[0267]
In the fourteenth embodiment, encoding processing is performed by using two frames between adjacent I frames and P frames and between two adjacent P frames as B frames. For example, the B frame may not exist.
[0268]
(Embodiment 15)
FIG. 16 is a block diagram for explaining an encoding apparatus according to Embodiment 15 of the present invention.
In addition to the configuration of the encoding device 100p of the fourteenth embodiment, the encoding device 100q of the fifteenth embodiment adds a video stream Dstr output from the output side switch based on the aspect ratio data Dar. It includes a packer 128q that performs a packing process and outputs a packed video stream Dpck. Here, the packing process is a process of dividing the video stream into data units (packs) of a predetermined size.
[0269]
The packer 128q receives the aspect ratio data Dar instead of the video attribute data Dva and the audio attribute data Daa which are input signals in the packer 128 of the eleventh embodiment. Other configurations are the same as those of the packer 128 of the eleventh embodiment.
[0270]
That is, the packer 128q divides the video stream into data units (packs) of a predetermined size by the packing process for the video stream in a state where the aspect ratio has not changed. Is changed, the above-mentioned packing processing is performed so that the head of the stream after the change in the aspect ratio matches the head of the stream stored in the pack.
[0271]
Specifically, when the aspect ratio change occurs in a state where a stream is stored in a predetermined pack, the packer 128q includes a predetermined pack instead of the stream after the aspect ratio change. Padding data is inserted.
Other configurations of the fifteenth embodiment are the same as those of the encoding device 100k of the fourteenth embodiment.
[0272]
Next, the function and effect will be described.
In the encoding device 100q of the fifteenth embodiment, as in the encoding device 100p of the fourteenth embodiment, when the aspect ratio changes, the first frame stream after the aspect ratio change and the first frame stream of the GOP Are encoded so that the video signals match.
[0273]
In the packer 128q, the packing process for dividing the video stream into packs of a predetermined size is performed so that the change point of the aspect ratio of the stream coincides with the head of the pack. Specifically, when a change in the aspect ratio occurs while a stream is stored in a predetermined pack, predetermined padding data is inserted into the pack in place of the stream after the aspect ratio change. The
[0274]
As described above, in the encoding device 100q of the fifteenth embodiment, in addition to the configuration of the fourteenth embodiment, when the above aspect ratio change occurs in the state where the stream is stored in the predetermined pack, Is provided with a packer 128q for inserting predetermined padding data in place of the stream after the aspect ratio change, so that the pack data Dpck recorded on the recording medium by performing address management in units of packs is supplied with an aspect ratio. It is possible to perform high-speed access to the changing point of the ratio.
[0275]
Note that the recording devices of Embodiments 1 to 9 and the encoding devices of Embodiments 10 to 15 can be realized by software in a computer system. Also in this case, the same effects as those of the above embodiments can be obtained.
In the first to ninth embodiments, an optical disk is shown as a recording medium. However, the recording medium for recording an audio video stream is not limited to this, and any recording medium can be used as long as it can record digital data. It may be a thing.
[0276]
【The invention's effect】
As above Clearly According to the present invention, the recording apparatus for recording an audio video stream on a recording medium includes an attribute detection unit that detects at least one of a video attribute and an audio attribute based on the audio video stream. The attribute change information indicating the recording time of the audio video stream relative to the reference time corresponding to the recording position of the audio video stream recorded on the recording medium or the attribute changing time corresponding to the recording time is recorded on the recording medium. Therefore, when playing back an audio video stream recorded on a recording medium, it is possible to recognize a portion of the audio video stream in which the video attribute or the audio attribute has changed. There is a video attribute It becomes possible to access the high speed to the portion where the change of the audio attribute occurs.
[0277]
This departure Clearly According to the above In the recording device, the video attribute and the audio attribute are detected, and attribute data indicating each attribute is recorded in a predetermined recording area of the recording medium. Therefore, when the audio video stream is reproduced, the video attribute and the audio attribute of the stream are recorded. It is possible to access a portion where any of these changes occur at high speed.
[0278]
This departure Clearly According to the above In the recording apparatus, as an attribute relating to the video signal, the video resolution of the video signal is detected, and the recording position of the stream recorded on the recording medium or the change in the video resolution corresponding to the time when the video resolution changes The stream recording time relative to the reference time corresponding to the time point is detected, and the resolution change information indicating the recording position or recording time is recorded together with the video resolution data indicating the video resolution. It becomes possible to access a portion where the video resolution is changed at high speed.
[0279]
This departure Clearly According to the above In the recording apparatus, as an attribute relating to the video signal, the aspect ratio of the video signal is detected, and the recording position of the stream recorded on the recording medium or the change in the aspect ratio corresponding to the time when the aspect ratio changes The recording time of the stream corresponding to the time point is detected and the aspect ratio change information indicating the recording position or recording time is recorded together with the aspect ratio data indicating the aspect ratio. It becomes possible to access a portion where the aspect ratio is changed at high speed.
[0280]
This departure Clearly According to the present invention, in a recording apparatus that records an audio video stream on a recording medium, the audio video stream is divided so that a pack as a data unit is formed for each predetermined size, and an audio corresponding to each pack is performed. A pack processing unit for outputting a video stream as pack data, wherein the position at which one of the attributes of the video signal and the audio signal in the audio video stream is changed is located at the head of the pack; As a result, it is possible to recognize a portion where the video attribute or the audio attribute has changed in the audio video stream in which the recording address is managed in units of packs, and the attribute change occurs when the audio video stream is played back. Against part It is possible to access to the speed.
[0281]
This departure Clearly According to the above In the recording apparatus, the video attribute relating to the video signal and the audio attribute relating to the audio signal are detected as the attribute, and attribute data indicating these attributes are recorded in a predetermined recording area of the recording medium. When the audio video stream is played back, the video attribute and audio attribute corresponding to this can be identified.
[0282]
This departure Clearly According to the above In the recording apparatus, an audio video with respect to a reference time corresponding to a recording position of an audio video stream recorded on the recording medium corresponding to a time when at least one of an audio attribute and a video attribute changes, or the attribute changing time Since the recording time of the stream is recorded on the recording medium, the audio video stream recorded on the recording medium is reproduced by reading out the recording position or the recording time corresponding to the attribute change time. It is possible to access a portion of the stream where the video attribute or the audio attribute is changed at high speed.
[0283]
This departure Clearly According to the above In the recording apparatus, the attribute detection unit detects the video resolution of the video signal as an attribute relating to the video signal, and the pack processing unit detects the position where the video resolution has changed in the video stream at the head of the pack. Since the above-described pack processing is performed so that the recording address is managed in units of packs, it is possible to recognize a portion where the video resolution has changed in the audio video stream in which the recording address is managed in pack units. It becomes possible to access the part where the change occurs at high speed.
[0284]
This departure Clearly According to the above In the recording apparatus, the attribute detection unit detects an aspect ratio of the video signal as an attribute relating to the video signal, and the packing processing unit determines the position where the aspect ratio has changed in the video stream at the head of the pack. Since the above packing processing is performed so that the recording address is managed in units of packs, it is possible to recognize the portion where the aspect ratio has changed in the pack unit, and when the audio video stream is played back, the aspect ratio It is possible to quickly access the part where the change occurs.
[0285]
This departure Clearly According to the present invention, in an apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium, the audio video stream is divided for each management unit for managing the stream, A video object composer for outputting a portion corresponding to each management unit of the stream as video object data, and the video object composer, when the attribute changes, from the change point of the attribute of the audio video stream; Since the previous part and the part after the change point of the attribute of the audio video stream are output as separate video object data, the video attribute or audio attribute is assigned to one video object data. Can be unified. As a result, when the audio / video stream recorded on the recording medium is reproduced, it is possible to easily perform the decoding process on each video object data based on the video attribute or audio attribute managed in units of each video object. It becomes possible.
[0286]
This departure Clearly According to the above In the recording apparatus, the management information for managing the audio video stream includes information regarding the recording position of each video object data with respect to the recording medium or the recording time of each video object data with respect to the reference time. Audio video streams recorded on the medium can be managed in units of video objects.
[0287]
This departure Clearly According to the above Video on video signal in recording device attribute And the audio information related to the audio signal is detected, and the management information includes the video attribute information indicating the video attribute and the audio attribute information indicating the audio attribute. It can be managed in units of video objects.
[0288]
This departure Clearly According to the above In the recording device, in the video object composer, when the video resolution changes, a portion of the video stream before the change point of the video resolution and a portion of the video stream after the change point of the video resolution are: Since the video stream is divided so as to be output as separate video object data, the video resolution can be unified for one video object data. As a result, when the audio / video stream recorded on the recording medium is played back, it is possible to easily perform the decoding process on each video object data based on the video resolution managed in units of each video object. .
[0289]
This departure Clearly According to the above In the recording device, when the aspect ratio changes, the video object composer separates the portion of the video stream before the aspect ratio change point and the portion of the video stream after the aspect ratio change point. Therefore, the aspect ratio can be unified for one video object data. As a result, when the audio / video stream recorded on the recording medium is reproduced, the decoding process for each video object data can be easily performed based on the aspect ratio managed in units of each video object. .
[0290]
This departure Clearly Accordingly, in the apparatus for encoding a video signal, a frame group including at least one frame subjected to the intra-frame encoding process or the inter-frame encoding process for the video signal is configured. And a video encoding unit configured to output a video stream corresponding to the frame group as a stream unit that can be randomly accessed. In the video encoding unit, a specific frame having the video attribute different from the immediately preceding frame is included. Since the frame group is configured to be the first frame of the frame group, when the video stream recorded on the recording medium with the frame group as an access unit is reproduced, the video attribute change point of the video stream is set. It is possible to access easily.
[0291]
This departure Clearly According to the above In the encoding device, the video encoding unit sets the frame group so that a specific frame in which the video attribute or an audio attribute of an audio signal accompanying the video signal is different from the immediately preceding frame is a first frame of the frame group. Therefore, when playing back a video stream recorded on a recording medium using the frame group as an access unit, a position corresponding to the change point of the video attribute or audio attribute of the video stream is easily accessed. It becomes possible to do.
[0292]
This departure Clearly According to the above The encoding apparatus includes a pack processing unit that performs pack processing for dividing the video stream so as to form a pack as a data unit for each predetermined size, and outputs a stream corresponding to each pack as pack data. In the pack processing unit, the pack processing is performed so that the position where the video attribute or the audio attribute in the video stream has changed is positioned at the head of the pack. It is possible to perform high-speed access to the change point of the video attribute or the audio attribute with respect to the video stream recorded in (1).
[0293]
This departure Clearly According to the above In the encoding device, the video encoding unit performs encoding processing for each frame in a specific frame group including the specific frame corresponding to a frame in a processed frame group that has been encoded before the specific frame group. Therefore, the video stream corresponding to the specific frame group can be reproduced at random.
[0294]
That is, since the encoding process for the specific frame group is performed without referring to the video signal of the processed frame group having a video attribute (video resolution) different from that of the specific frame group, the target frame that is the target of the encoding process In the inter-frame predictive encoding process, only a frame having the same video resolution as that of the target frame is used as a reference frame, and the decoding process for the video stream can be easily performed.
[0295]
Further, in the inter-frame predictive encoding process of the target frame, only the frame having the same aspect ratio as that of the target frame is used as the reference frame, so that the encoding process can be performed efficiently.
[0296]
This departure Clearly According to the above In the encoding device, the video encoding unit configures the frame group such that a specific frame having a video resolution different from that of the immediately preceding frame is the first frame of the frame group, so the frame group is recorded as an access unit. When playing back a video stream recorded on a medium, it is possible to easily access a change point of the video resolution of the video stream.
[0297]
This departure Clearly According to the above The encoding device includes a packing processing unit that performs a packing process for dividing a video stream so that a pack as a data unit is formed for each predetermined size, and outputs a stream corresponding to each pack as pack data, In the pack processing unit, the pack processing is performed so that the position where the video resolution has changed in the video stream is positioned at the head of the pack. The video stream can be accessed at high speed to the video resolution change point.
[0298]
This departure Clearly According to the above In the encoding apparatus, in the video encoding unit, the frame group is configured such that a specific frame having an aspect ratio different from that of the immediately preceding frame is the first frame of the frame group. When playing back a video stream recorded on a medium, it becomes possible to easily access the change point of the aspect ratio of the video stream.
[0299]
This departure Clearly According to the above The encoding apparatus includes a pack processing unit that performs pack processing for dividing the video stream so as to form a pack as a data unit for each predetermined size, and outputs a stream corresponding to each pack as pack data. The pack processing unit performs the pack processing so that the position where the aspect ratio in the video stream has changed is located at the head of the pack, so that the address management for each pack is performed and recorded on the recording medium. The video stream can be accessed at high speed to the aspect ratio change point.
[Brief description of the drawings]
FIG. 1 is a block diagram for explaining a recording apparatus according to a first embodiment of the invention.
FIG. 2 is a block diagram for explaining a recording apparatus according to a second embodiment of the present invention.
FIG. 3 is a block diagram for explaining a recording apparatus according to a third embodiment of the invention.
FIG. 4 is a block diagram for explaining a recording apparatus according to a fourth embodiment of the present invention.
FIG. 5 is a block diagram for explaining a recording apparatus according to a fifth embodiment of the present invention.
FIG. 6 is a block diagram for explaining a recording apparatus according to a sixth embodiment of the present invention.
FIG. 7 is a block diagram for explaining a recording apparatus according to a seventh embodiment of the present invention.
FIG. 8 is a block diagram for explaining a recording apparatus according to an eighth embodiment of the present invention.
FIG. 9 is a block diagram for explaining a recording apparatus according to a ninth embodiment of the present invention.
FIG. 10 is a block diagram for explaining an encoding apparatus according to a tenth embodiment of the present invention.
FIG. 11 is a block diagram for explaining an encoding apparatus according to an eleventh embodiment of the present invention.
FIG. 12 is a block diagram for explaining an encoding apparatus according to a twelfth embodiment of the present invention.
FIG. 13 is a schematic diagram for explaining the operation of the coding apparatus according to the twelfth embodiment, and shows a plurality of frames constituting one GOP.
FIG. 14 is a block diagram for explaining an encoding apparatus according to a thirteenth embodiment of the present invention.
FIG. 15 is a block diagram for explaining an encoding apparatus according to a fourteenth embodiment of the present invention.
FIG. 16 is a block diagram for explaining an encoding apparatus according to a fifteenth embodiment of the present invention;
FIG. 17 is a diagram illustrating a configuration of one GOP in the MPEG encoding scheme and a configuration of encoded data corresponding to the GOP.
FIG. 18 is a diagram for explaining a recording format when an audio video stream is recorded on a recording medium, and shows details of video attribute information.
FIG. 19 is a diagram showing another recording format when an audio video stream is recorded on a recording medium, in which details of video attribute information are designated.
FIG. 20 is a diagram for describing a recording format when an audio video stream is recorded on a recording medium, and shows details of audio attribute information.
FIG. 21 is a diagram illustrating a format of a video object (FIG. (A)) and a video packet constituting the video object when an audio video stream is recorded on a recording medium.
FIG. 22 is a diagram showing a video object format (FIG. (A)) and audio packets constituting the video object when an audio video stream is recorded on a recording medium.
[Explanation of symbols]
10 Recorded data
10a Video Manager (VMG) data
Data of 10a1, 10a2, 10a3 VOB (1), (2), (3)
10b1 Video manager information (VMGI)
10b2 audio video file table (AVFIT)
10c Audio video file table information (AVFITI)
10c1, 10c2, 10c3 VOB_STI (1), (2), (3)
10d1 Video attribute information (V_ATR)
10d2 Audio attribute information (A_ATR)
10e1 compression mode
10e2 horizontal resolution
10e3 vertical resolution
10e4 frame frequency
10e5 TV system information
10e6 aspect ratio
10e7 line 21 switch
10f1 coding mode
10f2 Quantization bit number
10f3 DRC discriminator
10f4 sampling frequency
10f5 number of audio channels
10f6 audio bit rate
10g1, 10g2, 10g3, 10g4, 10gn VOBU (1), (2), (3), (4), (n) data
10h (1) -10h (8), 10h (r) Data of video pack (V_PCK)
10i (1) -10i (8), 10i (s) Data of audio pack (A_PCK)
100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i
100j, 100k, 100m, 100n, 100p, 100q coding apparatus
101 Antenna
102 Broadcast receiver
103, 103b, 103c, 103f VOB composer
104 Recording signal processor
105 Recording head
106 Optical disc
107,124 Video attribute detector
107d, 129 video resolution detector
107g, 130 aspect ratio detector
108, 108d, 108g Address information generator
109,125 Audio attribute detector
110, 110b, 110c, 110d, 110f VMG generator
111 System controller
112, 128, 128n, 128q packer
113 Padding size generator
121 1st changeover switch
122a Intraframe encoder
122b Interframe encoder
123 Second changeover switch
126, 126m, 126p coding controller
127, 127m, 127p prediction mode controller
Daa audio attribute data
Dar aspect ratio data
Dpck PCK data (pack stream)
Dps size data
Dstr video stream
Dva video attribute data
Dvmg VMG data
Dvob VOB data
Dvr video resolution data
Isa specific address information
Iwa write address information
Pcnt prediction mode control signal
Sau audio signal
Sav audio video stream
Sbr broadcast signal
Scnt switch control signal
Sre recording signal
Svi video signal
F (j), F (j + 9), F (k), F (k + 12) Intraframe encoded frame (I frame)
F (j-3), F (j + 3), F (j + 6), F (k-3), F (k + 3), F (k + 6), F (k + 9) Forward Interframe predictive coding frame (P frame)
F (j-5), F (j-4), F (j-2) F (j-1), F (j + 1), F (j + 2), F (j + 3), F ( j + 4), F (j + 7), F (j + 8), F (k-5), F (k-4), F (k-2), F (k-1), F (k +1), F (k + 2), F (k + 4), F (k + 5), F (k + 7), F (k + 10), F (k + 11) Bidirectional interframe prediction code Frame (B frame)
D (k), D (k + 12) I frame encoded data
D (k + 3), D (k + 6), D (k + 9) P frame encoded data
D (k-5), D (k-4), D (k-2), D (k-1), D (k + 1), D (k + 2), D (k + 4), D (k + 5), D (k + 7), D (k + 10), D (k + 11) B frame encoded data
Da1 to Da16 Audio frame data
Dv1 I frame encoded data
Dv4, Dv7 P frame encoded data
Dv2, Dv3, Dv5, Dv6, Dv8, Dv9 B frame encoded data
Dpud, Dpud1 to Dpud8 padding data

Claims (10)

An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium,
An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute;
Based on the attribute data, the recording position of the audio video stream recorded on the recording medium corresponding to the time when the attribute changes, or the recording time of the audio video stream relative to the reference time corresponding to the attribute change time An information generating unit for detecting and outputting attribute change information indicating the recording position or recording time;
A recording unit for recording the attribute data and the attribute change information on the recording medium,
The attribute detection unit detects the video resolution of the video signal as an attribute relating to the video signal, and outputs video resolution data indicating the resolution,
The information generation unit, based on the video resolution data, a recording time of a stream recorded on the recording medium corresponding to a time when the video resolution changes, or a reference time corresponding to a time when the video resolution changes For detecting the recording time of the stream for and outputting resolution change information indicating the recording position or recording time,
The recording apparatus, wherein the recording unit records the video resolution data and the resolution change information on the recording medium. An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium,
An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute;
Based on the attribute data, the recording position of the audio video stream recorded on the recording medium corresponding to the time when the attribute changes, or the recording time of the audio video stream relative to the reference time corresponding to the attribute change time An information generating unit for detecting and outputting attribute change information indicating the recording position or recording time;
A recording unit for recording the attribute data and the attribute change information on the recording medium,
The attribute detection unit detects an aspect ratio of the video signal as an attribute relating to the video signal, and outputs aspect ratio data indicating the aspect ratio.
The information generation unit, based on the aspect ratio data, the reference time corresponding to the recording position of the stream recorded on the recording medium corresponding to the time when the aspect ratio changes, or the time when the aspect ratio changes. Detecting the recording time of the stream to output aspect ratio change information indicating the recording position or recording time,
The recording apparatus, wherein the recording unit records the aspect ratio and the aspect ratio change information on the recording medium. An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium,
A packing processing unit that performs packing processing for dividing the audio video stream so that a pack as a data unit is formed for each predetermined size, and outputs an audio video stream corresponding to each pack as pack data;
A recording unit that records the pack data on the recording medium as an access unit to the recording medium;
An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute;
The attribute detection unit detects the video resolution of the video signal as an attribute relating to the video signal, and outputs video resolution data indicating the resolution,
The pack processing unit performs the pack processing so that the position where the video resolution has changed in the video stream is positioned at the head of the pack based on the video resolution data. Recording device. An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium,
A packing processing unit that performs packing processing for dividing the audio video stream so that a pack as a data unit is formed for each predetermined size, and outputs an audio video stream corresponding to each pack as pack data;
A recording unit that records the pack data on the recording medium as an access unit to the recording medium;
An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute;
The attribute detection unit detects an aspect ratio of the video signal as an attribute relating to the video signal, and outputs aspect ratio data indicating the aspect ratio.
The pack processing unit performs the pack processing so that the position where the aspect ratio has changed in the video stream is positioned at the head of the pack based on the aspect ratio data. Recording device. An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium,
A video object composer that divides the audio video stream into management units for managing the stream, and outputs a portion corresponding to each management unit of the stream as video object data;
A recording unit for recording management information for managing each video object data on the recording medium;
An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute;
The attribute detection unit detects the video resolution of the video signal as an attribute relating to the video signal, and outputs video resolution data indicating the resolution,
When the video resolution changes based on the video resolution data, the video object composer includes a portion of the video stream before the video resolution change point and a change in the video resolution of the video stream. A recording apparatus, wherein the video stream is divided so that a portion after the point is output as separate video object data. An apparatus for recording an audio video stream obtained by encoding an audio video signal including an audio signal and a video signal on a recording medium,
A video object composer that divides the audio video stream into management units for managing the stream, and outputs a portion corresponding to each management unit of the stream as video object data;
A recording unit for recording management information for managing each video object data on the recording medium;
An attribute detection unit that detects an attribute related to at least one of the video signal and the audio signal based on the audio video stream, and outputs attribute data indicating the attribute;
The attribute detection unit detects an aspect ratio of the video signal as an attribute relating to the video signal, and outputs aspect ratio data indicating the aspect ratio.
When the aspect ratio changes based on the aspect ratio data, the video object composer includes a portion of the video stream before the aspect ratio change point and a point after the aspect ratio change point of the video stream. A recording apparatus for dividing the video stream so that the video stream is output as separate video object data. An apparatus for encoding a video signal,
A frame group including at least one frame that has been subjected to the intra-frame coding process or the intra-frame coding process for the video signal is configured, and a video stream corresponding to the frame group is random A video encoder that performs output as an accessible stream unit;
A video attribute detector for detecting the video attribute based on the video signal and outputting video attribute data indicating the video attribute;
The video attribute detection unit detects the video resolution of the video signal as the video attribute based on the video signal, and outputs video resolution data indicating the video resolution,
The video encoding unit configures the frame group based on the video resolution data so that a specific frame having a video resolution different from that of the immediately preceding frame is a first frame of the frame group. Device. The encoding device according to claim 7 , wherein
A pack processing unit that performs pack processing for partitioning the video stream so that a pack as a data unit is formed for each predetermined size, and outputs a stream corresponding to each pack as pack data;
The encoding apparatus, wherein the packing processing unit performs the packing processing so that a position where the video resolution has changed in the video stream is positioned at the head of the pack. An apparatus for encoding a video signal,
A frame group including at least one frame that has been subjected to the intra-frame coding process or the intra-frame coding process for the video signal is configured, and a video stream corresponding to the frame group is random A video encoder that performs output as an accessible stream unit;
A video attribute detector for detecting the video attribute based on the video signal and outputting video attribute data indicating the video attribute;
The attribute detector detects an aspect ratio of the video signal as the video attribute based on the video signal, and outputs aspect ratio data indicating the aspect ratio,
The video encoding unit configures the frame group based on the aspect ratio data so that a specific frame having a different aspect ratio from that of the immediately preceding frame becomes a first frame of the frame group. An encoding device. The encoding device according to claim 9 , wherein
A pack processing unit that performs pack processing for partitioning the video stream so that a pack as a data unit is formed for each predetermined size, and outputs a stream corresponding to each pack as pack data;
The encoding apparatus according to claim 1, wherein the packing processing unit performs the packing processing so that a position where the aspect ratio is changed in the video stream is positioned at a head of the pack.

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