JP4646160B2 - Transmission apparatus and method - Google Patents

Description

  The present invention relates to a transmission apparatus and method, and more particularly, to a transmission apparatus and method that can display image data created, recorded, and transmitted with different aspect ratios with a correct aspect ratio.

  Japan's television broadcasting is performed in the NTSC system, and its standard aspect ratio is set to 4: 3. Therefore, many displays such as conventional television receivers and monitor devices are set to an aspect ratio of 4: 3. However, recently, with the widespread use of high-definition television broadcasting represented by high-definition images having an aspect ratio of 16: 9, television receivers have been set to a wider 16: 9 aspect ratio. So-called wide TVs are becoming widespread.

  Along with this, the video sources that are created and broadcast are also configured with a wider 16: 9 and other aspect ratios.

  As shown in FIG. 46, the image data composed of the screen having the aspect ratio of 16: 9 and other aspect ratios is transmitted with the aspect ratio corrected as shown in FIG. I am doing so.

  FIG. 46A shows a screen having an aspect ratio of 4: 3. The image data on this screen is transmitted as it is. On the other hand, the image data of the screen having an aspect ratio of 14: 9 is a black portion (no image portion) at the upper and lower ends of the screen in the letterbox mode, as shown in FIG. Is added, the entire aspect ratio is set to a 4: 3 screen, and then transmitted. Alternatively, the image data of the screen having an aspect ratio of 14: 9 is compressed in the horizontal direction in the squeeze mode as shown in FIG. It is converted to image data and transmitted.

  Further, in the letterbox mode, the image data of the 16: 9 aspect ratio screen is a black portion (no image portion) at the upper and lower ends of the 16: 9 screen as shown in FIG. Is added to transmit the image so that the overall aspect ratio is 4: 3. In this case, the width of the black portion is thicker than in the case of the aspect ratio of 14: 9 in FIG.

  In addition, in the squeeze mode, the image data of the screen having the aspect ratio of 16: 9 is compressed in the horizontal direction so that the screen has a 4: 3 aspect ratio as shown in FIG. And transmitted.

  Furthermore, as shown in FIG. 46 (D), the image data of the Sinesco screen having an aspect ratio of about 2: 1 is wider in the letterbox mode than in the case of a screen having an aspect ratio of 16: 9. Are added to the top and bottom, and are corrected so that the overall aspect ratio is 4: 3, and then transmitted.

  In addition, a Sinesco screen with an aspect ratio of about 2: 1 is still set to an aspect ratio of 4: 3 even if it is compressed horizontally in a squeeze mode with a compression ratio of 16: 9 to 4: 3. Therefore, as shown in FIG. 46 (G), in the state where the left and right directions are compressed, a black portion is further added to the upper and lower ends of the screen for transmission. On a display with an aspect ratio of 4: 3, these images are received and displayed as they are.

  On the other hand, a display (television receiver) 80 having an aspect ratio of 16: 9 is configured as shown in FIG. 47, for example. That is, a video signal input via an antenna, a cable or the like is demodulated by a television signal demodulating circuit 81, and then passed through a horizontal filter 82 and a vertical filter 83, thereby having a CRT 85 having an aspect ratio of 16: 9. Are output and displayed. The controller 84 operates the horizontal filter 82 or the vertical filter 83 in response to a user command input from a remote commander (not shown).

  That is, for example, as shown in FIG. 48A, when a normal 4: 3 aspect ratio image (normal image) is demodulated and output from the television signal demodulation circuit 81, the user operates the remote commander. Then, the horizontal filter 82 is turned on and the vertical filter 83 is turned off. As a result, in the CRT 85 having an aspect ratio of 16: 9, as shown in FIG. 48 (D), black portions (non-image portions) are formed at the left and right ends of the effective image area having the aspect ratio of 4: 3. Added and displayed.

  When the letterbox mode data shown in FIG. 48B is received, the user operates the remote commander to turn off the horizontal filter 82 and turn on the vertical filter 83. At this time, the vertical filter 83 performs a process of cutting out only a portion of an effective image area having an original aspect ratio of, for example, 16: 9, excluding black portions added to the upper and lower ends. As a result, a 16: 9 aspect ratio screen is normally displayed on the CRT 85 as shown in FIG.

  On the other hand, as shown in FIG. 48C, when an image processed in the squeeze mode is transmitted, the user operates the remote commander, and the horizontal filter 82 and the vertical filter 83 are operated. Turn off both. As a result, a 16: 9 aspect ratio screen is normally displayed on the CRT 85 as shown in FIG.

  Thus, if the switching between the horizontal filter 82 and the vertical filter 83 is controlled by manual operation, the operability is deteriorated. Therefore, for example, during the vertical blanking period of the transmitted television signal, the correction information corresponding to the aspect ratio correction mode is transmitted, and the television signal demodulating circuit 81 separates it and outputs it to the controller 84. There is also a television receiver.

  In this case, the controller 84 controls switching between the horizontal direction filter 82 and the vertical direction filter 83 in response to not only a command from the remote commander but also a signal from the television signal demodulation circuit 81. In this way, the user does not necessarily need to perform a manual operation, and the operability is improved.

  However, the method of inserting such correction information on a predetermined line during the vertical blanking period has a problem that cannot be applied when an image is digitized and transmitted or recorded.

  That is, when a video signal is digitized and transmitted, the data during the blanking period is a substantially unnecessary section, so that it is defined by the standard not to be transmitted or recorded. As a result, even if correction information has been inserted during the vertical blanking period, this correction information will be deleted when digitized and transmitted or recorded.

  Further, for example, the insertion position of the black portion in the letterbox mode (in other words, the arrangement position of the effective image area) can have three changes as shown in FIG. FIG. 6A shows the case where the effective image area is arranged at the center (center), FIG. 6B shows the case where the effective image area is arranged on the upper side (top), and FIG. This is a case where it is arranged at the bottom.

  Further, FIG. 50 is a diagram showing a display example of subtitles, logos, symbols, and the like. When subtitles (ABC) are superimposed and displayed on the letterbox mode image shown in FIG. 6A, as shown in FIG. ) As shown in FIG. In addition, as shown in FIG. 4D, various patterns such as a logo, a mark, and a symbol may be superimposed and displayed on the black portion in addition to the caption.

  In analog broadcasting, the display position of these effective image areas, information on the display position of subtitles, logos, symbols, etc. are also specified to be transmitted on a predetermined line during the vertical blanking period. Therefore, these pieces of information cannot be used when the video data is digitized and transmitted or recorded.

  The present invention has been made in view of such a situation, and makes it possible to use correction information and the like when a video signal is digitized and transmitted.

In the data recording apparatus for recording image data, the transmission apparatus of the present invention packetizes the image data encoded by the encoding means, the encoding means for encoding the image signal, and at least the A table including aspect ratio information of image data, information indicating whether the image data is a film image or an image captured by a camera, and WSS subtitle mode information for the image data is 1 Packetizing means for packetizing so as to be configured in a packet; multiplexing means for multiplexing the image data packetized by the packetizing means; and the table packetized by the packetizing means; Transmitting means for transmitting data multiplexed by the multiplexing means.

The table may further include frame rate information.

The table may further include information indicating a horizontal length or a vertical length of a rectangular region in which an image corresponding to the image data is to be displayed.

The transmission method of the present invention is a data recording method of a data recording apparatus for recording image data, wherein the data recording apparatus encodes an image signal, and the image signal is encoded by processing of the encoding step. Packetized image data, and at least aspect ratio information of the image data, information indicating whether the image data is a film image or an image captured by a camera, and the image data A packetizing step for packetizing a table including WSS subtitle mode information into one packet, the image data packetized by the packetizing step, and the packetizing step A multiplexing step of multiplexing the table packetized by And a transmission step of transmitting the multiplexed data by the processing of the multiplexed step.

The table may further include frame rate information.

The table may further include information indicating a horizontal length or a vertical length of a rectangular region in which an image corresponding to the image data is to be displayed.

In the present invention, the image signal is encoded, the image data encoded with the image signal is packetized, and at least the aspect ratio information of the image data and the image data are captured by a film image or a camera. A table including information indicating which image data is an image and mode information of WSS subtitles for the image data is packetized so as to be configured in one packet . Then, the packetized image data and the packetized table are multiplexed, and the multiplexed data is transmitted.

  According to the present invention, correction information or the like can be used when a video signal is digitized and transmitted or recorded. This makes it possible to view the image in the correct state.

It is a figure explaining the transmission waveform of the identification signal in CPX-1204 specification. It is a figure explaining the structure of the bit transmitted with the waveform of FIG. It is a figure explaining the content of the bit of WORD0 of FIG. It is a figure explaining the transmission waveform of the identification signal in WWS. It is a figure explaining the content of the bit transmitted with the waveform of FIG. It is a figure explaining the detail of the aspect-ratio information of the group 1 of FIG. It is a figure which shows the example of a display in a letterbox. It is a figure explaining the detail of Aspect ratio label of FIG. It is a figure explaining the detail of Camera / Film of the bit 4 of the group 2 of FIG. It is a figure explaining the content of the bit 8 of the group 3 of FIG. It is a figure explaining the content of the bit 9 and the bit 10 of the group 3 of FIG. It is a figure explaining the bit structure of extended CPX-1204. It is a figure explaining the content of the bit of WORD0 of FIG. It is a figure explaining the content of WORD1 of FIG. It is a figure explaining the content of WORD2 in case WORD1 of FIG. 12 is 0000. It is a figure explaining the content of the bits 7 and 8 of FIG. It is a figure explaining the content of WORD2 in case WORD1 of FIG. 12 is 0001. It is a figure explaining the content of the bits 7 and 8 of FIG. It is a figure explaining the content of the bits 9 and 10 of FIG. It is a figure explaining the content of WORD2 in case WORD1 of FIG. 12 is 0010. It is a figure explaining the content of the bit 7 of FIG. It is a figure explaining the content of the bit 8 thru | or the bit 14 of FIG. It is a figure explaining the content of the identification signal in XDS. It is a figure explaining a caption position. It is another figure explaining a subtitle position. It is a figure explaining the structure of a program stream. It is a figure explaining the data content of an MPEG2 system stream. It is a figure explaining the structure of an entry sector. It is a figure explaining the structure of a program stream map. It is a figure which shows the syntax of the program stream map of FIG. It is a figure explaining the syntax of global_descriptors of FIG. It is a figure which shows the syntax of elementary stream descriptors of FIG. It is a figure which shows tag of descriptors. It is a figure explaining the syntax of dvd_video_descriptor. It is a figure which shows aspect_ratio_code. It is a figure explaining frame_ratio_code. It is a figure explaining video syntax. It is a figure explaining the syntax of user_data. It is a figure explaining user_data (). It is a block diagram which shows the structure of one Example of the image data recording device of this invention. It is a block diagram which shows the structural example of the optical disk reproducing device to which this invention is applied. It is a block diagram which shows the other structural example of the optical disk reproducing | regenerating apparatus of this invention. FIG. 43 is a block diagram illustrating a more detailed configuration example of the embodiment in FIG. 42. It is a figure explaining operation | movement of the Example of FIG. It is a block diagram which shows the other structural example of the optical disk reproducing device to which this invention is applied. It is a figure explaining the relationship between an aspect ratio and recording. It is a block diagram which shows the structural example of the conventional wide television receiver. It is a figure explaining operation | movement of the example of FIG. It is a figure which shows the display position of an effective image area | region. It is a figure which shows the display position of a caption.

  In the embodiment of the present invention, at least correction information relating to the correction of the aspect ratio, such as the squeeze mode or the letterbox mode, is transmitted and recorded (recorded) after being compressed and multiplexed with the digital image data with the corrected aspect ratio. First, a method for transmitting the correction information and additional information added to other video signals will be described.

  As standards for transmitting additional information, the EIAJ (Japan Electronic Machinery Manufacturers Association) defines CPX-1202 and CPX-1204.

  According to CPX-1202 defined as “identification signal of video signal having different aspect ratio and transmission method thereof”, a method of superimposing a DC voltage of a predetermined level as an identification signal on the S terminal that outputs a video signal Is stipulated. Therefore, for example, the value of the superimposed DC voltage is appropriately changed in accordance with the correction information of the digital image data to be transmitted (for example, in the letterbox mode, the value of the superimposed DC voltage is set to 3 V, and the squeeze mode If the image data has the aspect ratio corrected in the letterbox mode or the aspect ratio has been corrected in the squeeze mode, it can be specified. On the reception and reproduction side, aspect ratio correction control is performed in accordance with the value of the DC voltage superimposed on the S terminal.

  On the other hand, in CPX-1204 (commonly referred to as ID-1, video ID) defined as “identification signal of video signal having different aspect ratio and transmission method (II)”, the vertical blanking period of the luminance signal of the NTSC system In the 20th line and the 283rd line, it is specified that a 20-bit identification signal having a signal waveform as shown in FIG. 1 is encoded and transmitted. That is, a reference Ref signal is arranged with a width of 2.232 μs ± 20 ns at a position of 11.2 μs ± 0.6 μs from the falling edge of the horizontal synchronizing signal, and further, with an interval of the same width. , 20-bit data of bits 1 to 20 having the same width are arranged with the same width.

  As shown in FIG. 2, the 20-bit data is composed of 6-bit WORD0, 4-bit WORD1, 4-bit WORD2, and 6-bit CRC. WORD0 is further composed of 3-bit WORD0-A and 3-bit WORD0-B.

  Basic parameters mainly for automatic control on the receiver side are set in WORD0, and identification information regarding the video signal transmission format is arranged in WORD0-A as shown in FIG.

  That is, bit 1 of WORD0-A is set to 1 when the aspect ratio of the image data to be transmitted is 16: 9 (when it is in the full mode), and is set to 0 when it is 4: 3. Bit 2 is set to 1 when the image display format is letterbox and set to 0 when the image display format is normal.

  In WORD0-B, identification information related to video and other signals (for example, audio signals) transmitted simultaneously with the video can be arranged.

  An identification signal subordinate to WORD0 is arranged in WORD1, and an identification signal subordinate to WORD0, information, and the like are arranged in WORD2, respectively. The CRC code is an error check code, the generated other term G (X) is set to X6 + X + 1, and the presets are all set to 1.

  CPX-1204 is defined as an identification signal for television in the NTSC system, that is, a 525 line system. Similarly, in Europe, the PAL television of a 625 line system is also used in ETSI (European Telecommunication Standards Institute). The WSS (Wide Screen Signaling) standard for the identification signal of the system and the SECAM television system is about to be established.

  In the WSS, as shown in FIG. 4, it is defined that a 14-bit identification signal is encoded and transmitted on the 23rd line of the PAL signal. As shown in the figure, at the beginning of the 23rd line is Run-in for generating a clock, followed by Start Code indicating the start of the code, and then, 833 kHz of 14 Bit data is arranged.

  As shown in FIG. 5, the aspect ratio information is included in the first group of four bits among the 14 bits, the aspect ratio information is included in the second group of four bits, and the PAL plus related information is included in the next group. The subtitle information is arranged in the group 3 bits of 3 bits, and the last group 4 of 3 bits is undefined.

  The aspect ratio information is set as shown in detail in FIG. 6 when the four bits b3 to b0 of group 1 take a predetermined value. For example, when 4 bits is 1000, this indicates that the aspect ratio is 4: 3 and the image is a normal (full format) image. Reference numeral 0001 denotes a letterbox image having an aspect ratio of 14: 9, and the position of the effective image area is the center (center).

  0010 indicates that a letterbox image having an aspect ratio of 14: 9 is displayed at the top position.

  Note that the letterbox center display means that a substantial image (effective image area) is arranged at the center of the screen as shown in FIG. Represents a black portion (no image portion), and the top display means that a substantial image (effective image area) is displayed on the screen as shown in FIG. 49 (B) (FIG. 49 (B)). Means that a black portion is displayed at the bottom of the screen.

  FIG. 8 shows a more detailed range of the aspect ratio of FIG. That is, 4-bit 1000 in FIG. 6 has an aspect ratio of 4: 3, 0001 has an aspect ratio of 14: 9, 1011 has an aspect ratio of 16: 9, and 1101 is larger than 16: 9 (> 16: 9) The aspect ratios are respectively represented. The aspect ratio of 4: 3 means that when the aspect ratio of A: B is represented by a (= A / B) as shown in FIG. It is assumed that it is 1.46 or less. The aspect ratio of 14: 9 means that a is greater than 1.46 and less than or equal to 1.66, and the aspect ratio of 16: 9 is that a is greater than 1.66 and less than or equal to 1.90. The aspect ratio larger than 16: 9 means a case where a is a value larger than 1.90.

  Of the four bits of group 2 in FIG. 5, bit 4 represents the camera mode when it is 0, and represents the film mode when it is 1. That is, 0 represents an image captured from a normal television camera, and 1 represents an image converted from a film such as telecine.

  Bits 5 to 7 of group 2 in FIG. 5 are unused.

  Bit 8 of group 3, as shown in FIG. 10, 0 indicates that there is no caption in teletext, and 1 indicates that there is caption in teletext.

  Furthermore, as shown in FIG. 11, bit 9 and bit 10 of group 3 indicate that there is no subtitle when it is 00, and when it is 10, there is a subtitle in the screen (effective image area). And 01 indicates that there is a caption in the black part. 11 is unused.

  A display example in the case where the subtitle is located in the screen (effective image area) and in the case where the subtitle is located in the dark portion is shown in FIG.

  Note that bits 1 and 2 of WORD0-A of CPX-1204 shown in FIG. 3 can be automatically set corresponding to the aspect ratio information of WSS shown in FIG. For example, in FIG. 6, when it is 0111, bit 1 in FIG. 3 is set to 1, and in other cases in FIG. 6, bit 1 in FIG. 6 is 1 when the 4 bits in FIG. 6 are 0001, 0010, 1011, 0100, or 1101, and when the 4 bits in FIG. 6 are 1000, 1110, or 0111, Bit 2 of 3 is set to 0.

  The extension of CPX-1204 described above has been discussed recently (hereinafter referred to as extended CPX-1204). In this extended CPX-1204, for example, as shown in FIG. 12, the first 2 bits out of 20 bits are WORD0, the next 4 bits are WORD1, the next 8 bits are WORD2, and the last 6 bits are CRC. It is said.

  As shown in FIG. 13, identification information regarding the video signal transmission format is arranged in WORD0. When bit 1 of WORD0 is 1, it means a full mode (squeeze mode) with an aspect ratio of 16: 9, and 0 means an aspect ratio of 4: 3. Further, 1 of bit 2 of WORD0 means that the image display format is letterbox, and 0 means that it is normal.

  Thus, WORD0 in FIG. 12 is defined so as to be compatible with the portions of bits 1 and 2 of WORD0-A in FIG.

  Further, as shown in FIG. 14, WORD1 represents a header for designating information transmitted by WORD2, and for example, when 4 bits of bits 3 to 6 are 0000, WORD2 is digital copy information. 0001 represents information related to the image format, and 0010 represents subtitle position information.

  WORD2 represents data specified by the header of WORD1, and when WORD1 is 0000 and represents digital copy information, the contents shown in FIG. 15 are defined by 8 bits of bits 7 to 14 of WORD2. Is done. That is, in this embodiment, only bit 7 and bit 8 are substantially defined, and CGMS-A (Copy Generation Management System) shown in FIG. 16 depends on whether bit 7 and bit 8 are 1 or 0. -Analog Interface) table is defined. When the values of bits 7 and 8 are 00, this indicates copy free, 01 is not used, 10 indicates that copying is allowed only once, and 11 indicates that copying is prohibited.

  Further, in the case of information relating to an image format in which WORD1 is 0001, WORD2 is defined as shown in FIG. That is, bits 7 and 8 define the screen size shown in FIG. 18, and bits 9 and 10 define the screen position shown in FIG.

  Also, bit 11 of WORD 2 indicates that there is a caption in the non-image portion (black portion) when it is 1, and 0 indicates that there is no caption.

  As shown in FIG. 18, the screen size is 4: 3 when bits 7 and 8 are 00, 14: 9 letterbox when 01, and 16: 9 letterbox when 10. And when it is 11, it is used as a Sinese letterbox.

  Further, as shown in FIG. 19, the screen position is set to the center when bits 9 and 10 are 00, and is set to the top or bottom when the bits are 01 or 10, respectively. 11 is unused.

  Further, when WORD1 is effective image area position information including a subtitle of 0010, as shown in FIG. 20, bit 7 of WORD2 indicates that the display position of the effective image area including subtitles shown in bits 8 to 14 is the screen. It indicates whether it is information about the upper end of the screen or information about the lower end of the screen, where 1 indicates the upper end and 0 indicates the lower end.

  Further, as shown in FIG. 22, the values of 0 to 127 represented by 7 bits of bits 8 to 14 of WORD 2 are obtained from the uppermost end (or the lowermost end) of the effective image area including the caption from the upper end of the screen. Represents the number of lines. For example, when bit 7 is 1 and the value represented by bits 8 to 14 is 0, the uppermost end of the effective image area including the subtitle is displayed on the 22nd line from the upper end of the screen, and the bit When the value represented by 8 to 14 is 2, it is displayed on the 24th line from the upper end of the screen. When bit 7 is 0 and the value represented by bits 8 to 14 is 0, the uppermost line of the effective image area including the caption is the 262nd line, which is represented by bits 8 to 14. When the value to be set is 2, the uppermost line of the effective image area including the caption is the 260th line.

  When WORD1 (= 0010) is transmitted, it is transmitted at least twice in 2 seconds.

  In the US, in addition to the same method as CPX-1204, additional information such as image aspect ratio information is also transmitted by XDS (Extended Data Services) (former abbreviation EDS) defined by EIA-608. can do. In this XDS, a 16-bit signal with parity is inserted into the 21st and 284th lines of the NTSC television signal, so that, for example, as shown in FIG. And the identification of the squeeze mode or normal mode can be transmitted. The five bits S0 to S5 shown in FIG. 23 represent the start line of the effective image area, and the five bits E0 to E5 represent the end line of the effective image area. Further, Q0 is set to 1 in the squeeze mode, and Q0 is set to 0 in the normal mode.

  24 and 25 schematically show such caption position information and how to use it. For example, as shown in FIG. 24, the first line of the effective image area is represented by S0 to S5, and the end line is represented by E0 to E5. When the bottom line of the subtitle (ABC) is known, the line from the top line of the effective screen area to the bottom line of the subtitle can be cut out and displayed using a vertical filter or the like.

  In addition, as shown in FIG. 25, a black portion is added to both the upper side and the lower side of the effective image area. When the bottom line of the lower subtitle is known, the range from the top line of the upper subtitle to the bottom line of the lower subtitle can be cut out and displayed by the vertical filter. In this way, not only the effective image area but also the caption can be completely displayed without being lost.

  In this embodiment, the identification signal defined by the standards as described above is transmitted after being multiplexed with digital image data in which the data is compressed by the MPEG method and the aspect ratio is corrected, and received on the receiving side. Or, the data is recorded on a recording medium and reproduced by a reproducing apparatus. Next, a transmission (recording) format will be described.

  FIG. 26 illustrates a format (Syntax) of a program stream (MPEG2 system stream). As shown in the figure, the program stream is composed of n packs, and a pack header is arranged at the head of each pack. In each pack, pack start code, SCR, program mux rate, pack stuffing length, pack stuffing byte, etc. are arranged, and PES packet is sequentially arranged following the system header.

  In the system header, a system header start code, header length, rate bound, and the like are arranged.

  Furthermore, stream id, P_STD, buffer bound scale, P_STD, buffer size bound, and the like are arranged.

  FIG. 27A shows an example of a bit stream multiplexed according to the syntax shown in FIG. That is, as shown in FIG. 27A, video packets, subtitle packets, audio packets, and the like are transmitted in units of packets. When recording on a disk, recording is performed in units of sectors.

  Each packet is composed of a packet header and packet data, as shown in FIG. In this packet data, for example, if the packet is a video packet, as shown in FIG. 27C, the picture header and the picture coding extension, and the picture data and FIG. 27C are not shown as examples. A group picture header, a sequence header, a sequence end code, and the like are included.

  Among the picture data, a sector of a video packet including I picture data is an entry sector. In this entry sector, a pack header, PSD (Program Stream Directory), and PSM (Program Stream Map) are arranged. That is, a program stream map (PSM) is arranged immediately before the I picture.

  The configuration of the entry sector is collectively shown in FIG. That is, a pack header is arranged at the head of the entry sector, and a system header is arranged as an option here. Then, PSD and PSM are arranged next, and another packet is arranged next.

  FIG. 29 illustrates a program stream map (PSM) format (Syntax). A 24-byte packet start code prefix is arranged at the top, an 8-byte map stream id is arranged next, and a program stream map length is arranged next. Next to that, a current next indicator and the like are arranged.

  FIG. 30 shows the PSM Syntax shown in FIG. In the figure, bslbf represents a bit string left bit first, and uimsbf represents an unseen interger msb first. Further, rpchof represents a reminder primary coefficients high order first.

  FIG. 31 shows the syntax of global_descriptors () in the PSM Syntax in FIG. Also, FIG. 32 shows the syntax of the elementary stream descriptors in FIG.

  Various identifiers are described in dvd_video_descriptor () in elementary stream descriptors Syntax shown in FIG. 32, as will be described later with reference to FIG. 34, and dvd_video_descriptor (d) of It is added as defined in 33. In addition to this, FIG. 33 shows tags of various descriptors. Each descriptor is identified by this Tag.

  As shown in FIG. 33, dvd_video_descriptor () is uniquely defined by the DVD (Digital Video Disk) standard.

  FIG. 34 shows a Syntax of dvd_video_descriptor ().

  In FIG. 34, descriptor_tag is a tag for identifying this dvd_video_descriptor. As described with reference to FIG. 33, 0xdf is described here.

  descriptor_length represents the length of this dvd_video_descriptor.

  Horizontal_size and vertical_size represent the sizes of the encoded and recorded (transmitted) image data in the horizontal and vertical directions in units of the number of pixels.

  Also, display_horizontal_size and display_vertical_size represent the horizontal length and the vertical length of the rectangular area to be displayed, respectively. When the rectangular area is smaller than the encoded image area, a part of the encoded image is displayed in the display process. On the other hand, when the rectangular area is larger than the encoded image area, a reproduction image is displayed on a part of the display device in the display process (a black portion is added to the remaining area). .

  As described with reference to FIG. 9, film_or_camera_flag is a flag indicating whether the image is captured from the camera or converted from a film image into a video signal in the case of WSS.

  closed_gop_flag is set to 1 if the GOP (Group of Picture) does not refer to the immediately preceding GOP, and is set to 0 if the GOP is referred to.

  Still_picture_flag is a flag indicating whether or not the image is between the first still image and the last still image when a still image is displayed for a predetermined period.

  The edge_crop_flag is a flag indicating whether or not display of the edge crop mode (described later with reference to FIG. 44) is prohibited.

  The aspect_ratio_code is defined as shown in FIG. That is, the use of the value 0000 is prohibited. The value 0001 indicates that the aspect ratio of each pixel constituting the image is 1: 1, 0010 indicates the display aspect ratio is 4: 3, 0011 indicates 16: 9, and 0100 indicates 2.21: 1 is shown.

  frame_rate_code is defined as shown in FIG. That is, the value of 0000 is prohibited from use, and 0001 represents that the frame rate (frame frequency) of the video signal is 23.976 Hz. 0010 represents 24 Hz, 0011 represents 25 Hz, and 0100 represents 29.97 Hz. Furthermore, 0101 represents 30 Hz, 0110 represents 50 Hz, 0111 represents 59.94 Hz, and 1000 represents 60 Hz.

  wss_aspect_ratio_code represents the 4-bit aspect ratio information of group 1 shown in FIG. 5, and wss_subtitles_within_text_flag represents the presence / absence of bit 8 teletext subtitles in the 3-bit subtitle information of group 3 of FIG. This represents a flag (that is, the flag shown in FIG. 10).

  Note that when generating CPX-1204, WSS, extended CPX-1204, and the like, it is possible to use the aspect_ratio_code shown in FIG. 35 instead of the wss_aspect_ratio_code.

  Also, wss_subtitling_mode represents the subtitle position mode (that is, the mode shown in FIG. 11) represented by bit 9 and bit 10 in the 3-bit subtitle information of group 3 in FIG.

  cgms_a_code describes the digital copy information in the extended CPX-1204 (FIG. 14), that is, the data of bit 7 and bit 8 in FIGS.

  ext1204_screen_size_code describes the screen size defined by bit 7 and bit 8 of WORD2 in FIG.

  In ext1204_screen_position_code, the value of the screen position defined by bits 9 and 10 of WORD2 shown in FIGS. 17 and 19 is described.

  ext1204_subtitle_position_upper and ext1204_subtitle_position_lower represent the uppermost or lowermost line position of the uppermost or lowermost caption in FIG. 22, respectively.

  In the first embodiment described above, various identification signals (additional information) shown in FIG. 34 are recorded in the PSM, but may be recorded in the User Data of the Video_Layer instead of the PSM.

  That is, as shown in FIG. 37, in the Video Syntax defined in MPEG2, extensions_and_user_data (2) are provided following picture_header () and picture_coding_extension (). Along with the syntax of the extensions_and_user_data, for example, a necessary identification signal can be encoded and described as follows.

  That is, in User_data Syntax defined by MPEG, user_data can be defined as shown in FIG. Therefore, according to this rule, user_data is described as shown in FIG. The contents described here are substantially the same as the contents described in dvd_video_descriptor shown in FIG.

  In FIG. 39, marker_bit () is 8-bit data of 11111111. In order to prevent generation of specific data such as user_data_start_code (cause emulation) when preceding and succeeding data are combined. Is to be inserted.

  Next, as an example of an apparatus for multiplexing and transmitting the identification signal (additional information) into the digital video image data of the image compressed by the MPEG method and corrected for the aspect ratio as described above, An embodiment of a recording apparatus for recording the multiplexed data on a disk as a recording medium will be described with reference to FIG.

  In this recording apparatus, the audio encoder 102 compresses and encodes the audio signal input to the audio input by the MPEG method, and outputs it to the multiplexing apparatus 113. In addition, the video encoder 101 compresses and encodes a video signal input to the video input by the MPEG method, and outputs it to the multiplexer 113. In this case, the stream output from the audio encoder 102 is an MPEG2 audio stream (audio layer), and the stream output from the video encoder 101 is an MPEG2 video stream (video layer) shown in FIG. .

  The video encoder 101 basically encodes an image having an aspect ratio of 4: 3. An image having a wide aspect ratio such as 16: 9, 14: 9, or 2: 1 is shown in FIG. As described with reference to FIG. 46, it is assumed that the aspect ratio correction processing is performed in the letterbox mode or the squeeze mode and then input to the video encoder 101.

  The multiplexer 113 packetizes the MPEG video stream and the MPEG audio stream, and performs time division multiplexing as shown in FIG.

  Although not shown, the subtitle stream can be supplied to the multiplexing device 113 and multiplexed together with the video stream and the audio stream. In this case, the MPEG2 system stream output from the multiplexer 113 includes subtitle packets in addition to video packets and audio packets, as shown in FIG.

  The multiplexer 113 forms (reserves) the PSM area, but for the time being, it is left blank for multiplexing (actual data (additional information) is written by the PSM data overwriting circuit 155). )

  The entry point data storage circuit 133 is supplied with the output of the entry point detection circuit 131. The entry point data storage circuit 133 receives the entry point information (information about the I picture occurrence point) detected and output by the entry point detection circuit 131 and stores it.

  The TOC data generation circuit 156 looks at the stored contents of the entry point data storage circuit 133 and generates TOC (Table Of Contents) information. The TOC information includes the name of the disk, the name of each chapter, and the disk of each chapter. The upper start address, the required playback time of the disc, the required playback time of each chapter, the start address of each entry sector, and the like are also included.

  The multiplexed stream output from the multiplexing circuit 113 is temporarily stored in a DSM (Digital Storage Media) 110, read out from the DSM 110, and supplied to the TOC adding circuit 150. The TOC addition circuit 150 adds the TOC information generated by the TOC data generation circuit 156 to the multiplexed stream supplied from the DSM 110 and outputs it to the PSM data overwrite circuit 155.

  The generation circuit 157 generates the PSM data (dvd_video_descriptor) shown in FIG. 34 described above from the output of the video encoder 101, and outputs this to the PSM data overwrite circuit 155. The PSM data overwrite circuit 155 overwrites the PSM data in the entry sector area for writing the PSM data in the multiplexed stream secured by the multiplexing device 113.

  The output of the PSM data overwriting circuit 155 is supplied to a sector header adding circuit 151, where a multiplexed stream is divided for each sector, and a sector header is added for each sector. The data to which the sector header is added by the sector header addition circuit 151 is input to an ECC (error detection and correction) encoder 152, and an encoding process for error detection and correction is executed.

  The data output from the ECC encoder 152 is input to the modulation circuit 153, EFM (Eight to Fourteen Modulation) modulation, and the modulation output is transmitted to the transmission line. In this embodiment, it is supplied to the cutting machine 154.

  The cutting machine 154 records multiplexed stream data by forming pits on the disk 160 corresponding to the data input from the modulation circuit 153. A large number of DVDs (Digital Video Disks) are manufactured using the disk 160 as a master.

  FIG. 41 shows a configuration example of a playback apparatus that plays back the optical disc 1 as a DVD generated as described above. The optical disk 1 is controlled to rotate at a predetermined rotational speed by a spindle motor (not shown). By irradiating a laser beam from the pickup 2 to the track of the optical disk 1, the optical disk 1 is compressed by the MPEG method recorded on the track. The read digital data is read out. This digital data is input to the demodulation circuit 3, EFM demodulated, and then supplied to the sector detection circuit 4. The output of the pickup 2 is input to a phase-locked loop (PLL) circuit 9, and the clock is reproduced. This recovered clock is supplied to the demodulation circuit 3, the sector detection circuit 4, and the like.

  On the optical disc 1, a multiplexed stream is recorded with a fixed-length sector as a unit as shown in FIG. 27A. A sector header is arranged at the head of each sector. The sector sync is added. The sector detection circuit 4 detects the sector sync by detecting the sector sync. The sector detection circuit 4 detects a sector address and supplies it to the control circuit 6 and the track jump determination circuit 7.

  The data output from the demodulation circuit 3 is input to an ECC (error detection / correction) circuit 33 via the sector detection circuit 4, and an error detection / correction process is performed. Data subjected to the error detection and correction process is written into the ring buffer memory 5 under the control of the control circuit 6.

  The output of the ECC circuit 33 is also input to the PSM detection circuit 40. The PSM detection circuit 40 detects PSM information (additional information) in the entry sector from the input stream data, and outputs the detected PSM information to the control circuit 6. The control circuit 6 controls the signal generator 51 in response to this PSM information. In response to this control, the signal generator 51 generates an identification signal supplied to the display 18 having an aspect ratio of 16: 9, for example. The D / A converter 17 inserts this identification signal into the 20th line and the 283rd line of the vertical blanking period of the NTSC analog video signal, for example, as described with reference to FIG. Output to the display 18.

  Based on the sector address of each sector supplied from the sector detection circuit 4, the control circuit 6 designates a write address for writing the data of the sector into the ring buffer 5 by the write pointer WP. Furthermore, the control circuit 6 designates a read address for reading data from the ring buffer 5 by the read pointer RP based on the request signal from the code from the video code buffer 10 at the subsequent stage. Data read from the position of the read pointer RP is supplied to the demultiplexer 32.

  The focus servo circuit 25 generates a focus error signal from the output of the pickup 2 and executes focus servo in response to the focus error signal. Similarly, the tracking servo circuit 8 controls the pickup 2 and performs tracking servo in response to the tracking error signal output from the pickup 2.

  In response to a command from the control circuit 6, the track jump determination circuit 7 supplies a track jump command signal to the tracking servo circuit 8 at a predetermined timing so that the pickup 2 moves (jumps) to a predetermined track at high speed. Has been made.

  The user interface 31 is operated when a user inputs a predetermined command, and a command corresponding to the operation is input to the control circuit 6.

  The demultiplexer 32 separates these data from the data supplied from the ring buffer 5 because the data recorded on the optical disc 1 is encoded data obtained by multiplexing video data, audio data, subtitle data, and the like. Then, the audio data and the subtitle data are supplied to an audio decoder and a subtitle decoder (not shown), and the video data is supplied to the video code buffer 10 of the video decoder 20.

  A part of the data stored in the video code buffer 10 is supplied to the picture header detector 34. The picture header detector 34 detects a picture header from the input data, and from this picture header, type information indicating the type of I, P, and B of the picture, and temporal reference (TR) indicating the screen order in the GOP. Detect information. The detected picture type information is further supplied to the picture data selection circuit 35. The picture data selection circuit 35 controls only the I picture and P picture to be supplied from the video code buffer 10 to the inverse VLC circuit 11 during special reproduction.

  During normal playback, the picture data selection circuit 35 controls to supply all types of pictures from the video code buffer 10 to the inverse VLC circuit 11 without selecting pictures according to the picture type.

  The data supplied to the inverse VLC circuit 11 is subjected to inverse VLC processing there and then supplied to the inverse quantization circuit 12. At this time, the inverse VLC circuit 11 sends a code request signal to the video code buffer 10 and receives new data from the video code buffer 10.

  The inverse VLC circuit 11 outputs the quantization step size to the inverse quantization circuit 12 and outputs motion vector information to the motion compensation circuit 15. The inverse quantization circuit 12 inversely quantizes the data supplied from the inverse VLC circuit 11 in accordance with the quantization step size supplied from the inverse VLC circuit 11 and supplies it to the inverse DCT circuit 13. The inverse DCT circuit 13 performs an inverse DCT process on the input data and then outputs it to the adder circuit 14.

  The adder circuit 14 adds the output of the inverse DCT circuit 13 and the output of the motion compensation circuit 15 according to the picture type (I, P, B), and outputs the result to the frame memory bank 16.

  The frame memory bank 16 includes three frame memories 16a, 16b, and 16c, and switches 16d and 16e for switching the input and output thereof. By switching 16e, the memory to be read is switched to one of 16a, 16b, and 16c. As a result, the decoded image of each frame is returned to the original frame order and then supplied to the D / A converter 17. The data read from the frame memory banks 16a, 16b, and 16c is appropriately supplied to the motion compensation circuit 15 and supplied to the adder circuit 14 as motion prediction data.

  The D / A converter 17 incorporates an NTSC encoder or a PAL encoder, converts the digital image data supplied from the switch 16e into an NTSC or PAL analog video signal, and outputs the analog video signal to the display 18. Has been made.

  Next, an operation for controlling the aspect ratio correction state corresponding to the detected PSM information will be described. The pickup 2 reproduces the data recorded on the optical disc 1 and outputs it to the demodulation circuit 3. The demodulation circuit 3 performs EFM demodulation on the input reproduction data, and outputs it to the ECC circuit 33 via the sector detection circuit 4. The ECC circuit 33 performs error detection and correction processing on the input data, and then supplies the data to the ring buffer 5 for recording.

  The data read from the ring buffer 5 is input to the demultiplexer 32. The demultiplexer 32 separates the subtitle data and the audio data from the input data, and outputs them to the subtitle decoder and the audio decoder, respectively. The video data is separated and output to the video code buffer 10.

  The data stored in the video code buffer 10 is further supplied to the inverse VLC circuit 11, subjected to inverse VLC processing, then inversely quantized by the inverse quantization circuit 12, and further subjected to inverse DCT processing by the inverse DCT circuit 13. The data output from the inverse DCT circuit 13 is guaranteed in motion by the data output from the motion compensation circuit 15 by the adder circuit 14, and then written to any of the frame memories 16a to 16c via the switch 16d.

  The data written in the frame memories 16a to 16c is read out in the order of the original frames via the switch 16e, converted into an NTSC analog video signal by the D / A converter 17, and then the 16: 9 The image is output to the aspect ratio display 18 and displayed.

  On the other hand, the PSM detection circuit 40 detects PSM information from the data output from the ECC circuit 33 and outputs it to the control circuit 6. The control circuit 6 outputs a control signal corresponding to the input PSM information to the signal generator 51. The signal generator 51 generates a predetermined identification signal corresponding to this control signal and outputs it to the D / A converter 17. This signal is a signal corresponding to the content of dvd_video_descriptor shown in FIG.

  When a wide television receiver 80 having a CRT 85 having an aspect ratio of 16: 9 as shown in FIG. 47 is connected as the display 18, the television receiver 80 has a horizontal direction in the horizontal direction. A filter 82 and a vertical filter 83 are provided. Therefore, when the signal generator 51 outputs the PSM information to the D / A converter 17, the D / A converter 17 uses the 20th line and the PSM information as described with reference to FIG. Insert on line 283 (FIG. 1). Then, this signal is supplied to the television receiver 80.

  In the television receiver 80, as shown in FIG. 47, a television signal demodulating circuit 81 separates the video signal and the identification signal, and the video signal is passed through a horizontal filter 82 and a vertical filter 83 to a CRT 85. Output to and display. The identification signal is extracted and supplied to the controller 84. The controller 84 controls the horizontal filter 82 and the vertical filter 83 in response to the extracted identification signal.

  Therefore, for example, in the correction information, image frame information includes an identification signal indicating whether the data has been subjected to aspect correction processing in letterbox mode, or data subjected to aspect correction processing in squeeze mode as aspect ratio information. An identification signal indicating whether or not there is included. The controller 84 turns on the horizontal filter 82 and turns off the vertical filter 83 when another identification signal that is neither in the letterbox mode nor in the squeeze mode (that is, the identification signal in the normal mode) is supplied. As a result, as shown in FIGS. 48A and 48D, black portions are added to the left and right of the 4: 3 aspect ratio screen, so that a 16: 9 aspect ratio screen as a whole is obtained. : Displayed on a CRT 85 having an aspect ratio of 9.

  In the case of a letterbox mode image, the controller 84 turns off the horizontal filter 82 and turns on the vertical filter 83. Thus, as shown in FIGS. 48B and 48E, only the effective image area is extracted by the vertical filter 83 and displayed on the CRT 85 as a 16: 9 aspect ratio screen.

  In the squeeze mode, the controller 84 turns off both the horizontal filter 82 and the vertical filter 83. As a result, as shown in FIGS. 48 (C) and 48 (F), an image compressed in the horizontal direction to have an aspect ratio of 4: 3 is expanded in the horizontal direction in a CRT 85 having an aspect ratio of 16: 9. A normal image having an aspect ratio of 16: 9 is displayed.

  Also, for example, when the PSM information includes a signal that defines the position of the effective image area and the subtitle position as shown in FIGS. 17 to 22, the television receiver should display the subtitle so that it is not lost. Generate a signal so that the line can be extracted.

  For example, as shown in FIG. 24, it is assumed that black portions are added to the top and bottom of the screen, and subtitles are arranged in the lower black portion. In such a case, if the display 18 is displayed excluding the black portion including the upper and lower subtitles, if all or a part of the subtitles is lost, the maximum of the effective screen area is displayed. A signal generator 51 generates a signal including range information so that the range from the top line to the bottom line of the caption can be extracted by the vertical filter 83 of the television receiver, and the D / A converter 17 generates the television. To John receiver.

  Alternatively, as shown in FIG. 25, when subtitles exist in both the upper and lower dark portions, the range from the uppermost line of the upper subtitle to the lower end line of the lower subtitle is vertically The signal generator 51 generates a signal including range information so that it can be extracted by the filter 83, and the D / A converter 17 transmits the signal to the television receiver. In this way, the loss of part of the image is substantially suppressed.

  As described above, the optical disc 1 in which the compressed and aspect-corrected image is digitally recorded can be reproduced and displayed in the same manner as in the case of analog recording.

  In the embodiment of FIG. 41, the horizontal direction filter and the vertical direction filter are not built in the optical disk playback device 50. However, taking into account that a normal 4: 3 display is connected to the playback device, A similar filter can be incorporated. That is, as shown in FIG. 42, the video signal output from the demultiplexer 32 is supplied to the video decoder 20, and the video data output from the video decoder 20 is supplied to the display 18 through the horizontal filter 61 and the vertical filter 62. Make it output. Then, the PSM information detected by the PSM detection circuit 40 is supplied to the control circuit 6 so that the control circuit 6 controls the horizontal filter 61 and the vertical filter 62 in accordance with the PSM information.

  In this case, as the display 18, a display 18A such as a wide television receiver having an aspect ratio of 16: 9 (that is, the television receiver 80 shown in FIG. 47) can be connected, or It is also possible to connect a display 18B of a normal NTSC television receiver having an aspect ratio of 4: 3.

  FIG. 43 shows a more detailed configuration example in this case. As shown in the figure, in this embodiment, the video data output from the frame memory bank 16 is supplied to the D / A converter 17 via the horizontal filter 61 and the vertical filter 62. ing. The horizontal filter 61 and the vertical filter 62 are controlled in response to a control signal output from the control circuit 6. Other configurations are the same as those in FIG.

  In this embodiment, whether the display (television receiver) 18 connected to the optical disc playback apparatus 50 has a 16: 9 aspect ratio or a 4: 3 aspect ratio. To the control circuit 6 from the user interface 31. This command is performed by switching a predetermined switch (provided as the user interface 31) set in advance.

  When the display 18 connected to the optical disc reproducing apparatus 50 is a display 18A having an aspect ratio of 16: 9, the control circuit 6 turns off the horizontal filter 61 and the vertical filter 62. Therefore, in this case, the configuration is substantially the same as that of the embodiment shown in FIG. 41, and the same operation as that of the embodiment shown in FIG. 41 is performed.

  The display 18B having an aspect ratio of 4: 3 does not include a horizontal filter or a vertical filter. Therefore, when a display 18B having an aspect ratio of 4: 3 is connected as the display 18, the control circuit 6 controls the built-in horizontal filter 61 and vertical filter 62 as follows.

  That is, in the case of a normal mode image, both the horizontal filter 61 and the vertical filter 62 are turned off. As a result, a normal image is displayed on the display 18B having an aspect ratio of 4: 3.

  Even in the case of a letterbox mode image, the control circuit 6 turns off both the horizontal filter 61 and the vertical filter 62. As a result, a black portion is added to the top and bottom, and an image adjusted to an aspect ratio of 4: 3 as a whole is displayed on the display 18B.

  When the reproduced image is a squeeze mode image, the control circuit 6 controls the horizontal filter 61 and the vertical filter 62 as shown in FIG. That is, the control circuit 6 basically turns on the horizontal filter 61 and turns off the vertical filter 62. As a result, a part of the image compressed in the horizontal direction by the horizontal filter 61 is cut out and expanded in the horizontal direction, and the image is displayed in the edge crop mode on the display 18B having a 4: 3 aspect ratio. .

  In the edge crop mode, as shown in FIG. 44, a part of the effective image area (the image at the left and right ends) is lost. For this reason, display of the edge crop mode may be prohibited from the viewpoint of copyright or the like. When the edge crop mode display prohibition is designated as edge_crop_flag, the control circuit 6 turns off the horizontal filter 61 and turns on the vertical filter 62.

  The vertical filter 62 compresses the squeeze mode image compressed in the horizontal direction in the vertical direction, converts it into a normal ratio image, and adds black portions to the upper and lower ends of the effective image area. Thus, an image having an aspect ratio of 4: 3 is obtained as a whole. That is, an image in letterbox mode is generated. Then, this letterbox mode image is output to the display 18B having an aspect ratio of 4: 3 and displayed.

  When the user manually inputs an edge crop mode command while the letterbox mode is being displayed, the control circuit 6 turns off the vertical filter 62 and operates in the horizontal direction. The filter 61 is turned on to display the edge crop mode. However, as described above, when the display of the edge crop mode is prohibited, the control circuit 6 does not accept this manual command.

  Switching from edge crop mode to letterbox by manual operation is also possible.

  When the aspect ratio of an image is changed using a horizontal / vertical filter in the reproducing apparatus, the information generated by the signal generator 51 is controlled so as to represent the state of the aspect ratio of the image after passing through each filter. 6 controls. By doing so, a 16: 9 display is actually connected even though the user interface 31 indicates that a 4: 3 display is connected to the playback device. Even in this case, at least, as a result, display can be performed with a correct aspect ratio.

  In the above embodiment, the additional information is encoded as a part of the identification signal into the PSM of the system layer, but may be encoded as a private packet defined by the MPEG system layer. Alternatively, it is encoded as a part of extensions_and_user_data (0) following the Sequence_header collectively for each Sequence, or is encoded as a part of the extension_a_state_ahead____________________________________ after_Group_picture_header. Alternatively, encoding may be performed as a part of extensions_and_user_data (2) for each picture. Furthermore, it is also possible to record in a TOC area arranged at a specific position of the disc as disclosed in Japanese Patent Application No. 7-61411, collectively for each recording medium (optical disc).

  In the embodiment of the playback apparatus described above, NTSC has been described, but the same effect can be obtained for the PAL system by using the WSS signal described above instead of CPX-1204 and its extended version.

  FIG. 45 shows an example of the configuration of an optical disc reproducing apparatus when XDS is recorded in a private stream defined in MPEG System layer as previously disclosed in Japanese Patent Application No. 7-6902. As shown in the figure, in this embodiment, the private stream is separated by the demultiplexer 32 and supplied to the private stream (XDS signal) decoder 71.

  The private stream decoder 71 decodes the XDS signal from the input private stream and outputs it to the XDS signal changing device 72. When the display 18 has the horizontal filter 82 and the vertical filter 83 as shown in FIG. 47, the processing in the horizontal filter 61 and the vertical filter 62 of the optical disc reproducing device 50 is not necessary as described above. However, when the aspect ratio is changed by the horizontal / vertical filters 61 and 62, the XDS signal changing device 72 responds to the command from the control circuit 6 in accordance with the aspect ratio of the output images from both filters. The XDS signal is changed, and the changed result is output to the XDS signal generator 73. The XDS signal generator 73 generates an XDS signal corresponding to the input from the XDS signal changing device 72 and outputs it to the D / A converter 17. The D / A converter 17 inserts the input XDS signal into the 21st line and the 284th line and outputs it to the display 18.

  Thus, also in this embodiment, the same processing as when the identification signal is arranged in the PSM can be executed.

  Further, by using the signal generator 51 and the D / A converter 17 for CPX- 1202, a CPX-1202 signal can be generated in the same manner as in the reproducing apparatus embodiment. It is also possible to record timing information indicating the time when the correction information becomes valid together with the correction information and transmit the timing information to the display 18 based on the time. As this timing information, for example, PTS (Presentation Time Stamp) and DTS (Decoding Time Stamp) defined by MPEG may be recorded. When PSM is used, a pack header placed immediately before PSM is used. SCR (System Clock Reference) is used.

  In the above embodiment, the multiplexed data is recorded on the recording medium and reproduced by the reproducing apparatus. However, the data is transmitted to the remote place via the network, received, and used. It is also possible to do so.

  As described above, according to the present invention, it is possible to view an image in a correct state even when the output device has a filter that performs vertical or horizontal processing.

    1 optical disk, 2 pickup, 4 sector detection circuit, 5 ring buffer, 6 control circuit, 8 tracking servo circuit, 10 video code buffer, 16 frame memory bank, 17 D / A converter, 18 display, 20 video decoder, 32 data Multiplexer, 40 PSM detection circuit, 61 horizontal filter, 62 vertical filter, 51 signal generator, 71 private stream decoder, 72 XDS signal modification device, 73 XDS signal generator, 81 television signal demodulation circuit, 82 horizontal filter , 83 Vertical filter, 85 CRT

Claims (6)

In a transmission device for transmitting image data,
Encoding means for encoding an image signal;
The image data in which the image signal is encoded by the encoding means is packetized, and at least the aspect ratio information of the image data and the image data are either image data of a film or an image captured by a camera. Packetizing means for packetizing such that a table including information indicating whether or not and WSS subtitle mode information for the image data is configured in one packet ;
Multiplexing means for multiplexing the image data packetized by the packetizing means and the table packetized by the packetizing means;
A transmission device comprising: transmission means for transmitting the data multiplexed by the multiplexing means. The transmission apparatus according to claim 1, wherein the table further includes frame rate information. The transmission apparatus according to claim 1, wherein the table further includes information indicating a horizontal length or a vertical length of a rectangular region in which an image corresponding to the image data is to be displayed. In a transmission method of a transmission device for transmitting image data,
The transmission device is
An encoding step for encoding the image signal;
The image data in which the image signal is encoded by the process of the encoding step is packetized, and at least the aspect ratio information of the image data and either the image data of the film image or the image captured by the camera A packetizing step for packetizing a table including information indicating whether the image data is WSS subtitle mode information for the image data so as to be configured in one packet ;
Said image data packetized by the processing in the packetization step, the multiplexing step for multiplexing said table packetized by the processing in the packetization step,
A transmission step of transmitting data multiplexed by the processing of the multiplexing step. The transmission method according to claim 4, wherein the table further includes frame rate information. The transmission method according to claim 4, wherein the table further includes information indicating a horizontal length or a vertical length of a rectangular region in which an image corresponding to the image data is to be displayed.

Images