WO2012081241A1 - 制作装置及びコンテンツ配信システム - Google Patents
制作装置及びコンテンツ配信システム Download PDFInfo
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Definitions
- the present invention relates to a technique for producing distribution content including distribution video data.
- Patent Document 1 when a plurality of digital streams recorded on different recording media are reproduced, the synchronization is defined so that a viewer can feel as if one movie work is being reproduced.
- Disclosed is a synchronous application technology. According to this technology, since digital streams that are constituent elements of a movie work can be supplied to viewers using separate supply media, various reproduction variations can be produced.
- Patent Document 1 provides one method for producing various reproduction variations for one movie. However, in order to further disseminate contents represented by movies, there are various methods for reproducing contents. Technology is demanded.
- the present invention aims to provide a production device, a production method, a computer program, a recording medium, an integrated circuit, and a content distribution system that can produce distribution content that further enriches the color tone expression during video reproduction.
- the present invention provides a production apparatus for producing distribution content including distribution video data, original acquisition means for acquiring original video data, and gradation of an image with respect to the original video data
- Distribution acquisition means for acquiring the distribution video data generated by performing conversion to reduce the difference
- difference generation means for generating difference data between the original video data and the distribution video data
- output means for outputting the difference data It is characterized by providing.
- the reproduction apparatus since the difference data between the original video data and the distribution video data is generated and output, the reproduction apparatus uses the difference data to reproduce only the distribution content recorded on the recording medium. As a result, it is possible to reproduce an image with improved tone expression.
- FIG. 1 is an overall configuration diagram of a content distribution system 10a as Embodiment 1.
- FIG. It is a whole block diagram of the content delivery system 10 as Embodiment 2.
- FIG. 2 is a block diagram illustrating a configuration of a production apparatus 100.
- FIG. An example of the data structure of the original image D1, the first converted image D2, and the re-expanded image D4 is shown.
- An example of the data structure of the re-expanded video D4, the shift re-expanded video D5, and the original video D1 is shown.
- An example of the data structure of difference data D7 and fixed gradation difference data D8 is shown.
- An example of a difference, a primary reduction difference, and a fixed gradation difference is shown.
- Another example of a difference, a primary reduction difference, and a fixed gradation difference is shown.
- An example of the data structure of shift amount data D20a is shown.
- An example of the data structure of shift amount data D20 is shown.
- An example of the data structure of shift amount data D20b is shown.
- the production process of the recording medium in the production apparatus 100 is shown.
- the data structure of the recording medium 200 is shown.
- the data structure of the recording medium 300 is shown.
- 3 is a block diagram showing a configuration of a playback device 400.
- FIG. An example of the data structure of the re-expansion image
- An example of the data structure of fixed gradation difference data D8 and shift difference data D11 is shown.
- FIG. 3 is a block diagram showing a configuration of an external storage device 500.
- FIG. 3 is a block diagram showing a configuration of a distribution server device 600.
- FIG. 3 is a flowchart showing the operation of the production apparatus 100.
- 4 is a flowchart showing an operation of producing the recording medium 300 by the production apparatus 100.
- 4 is a flowchart showing an operation of producing the recording medium 200 by the production apparatus 100.
- 10 is a flowchart showing an operation of generating shift amount data by a shift amount data generating unit 109 of the production apparatus 100.
- 10 is a flowchart illustrating an operation of generating fixed tone difference data by the reduction unit 110 of the production apparatus 100.
- 10 is a flowchart showing an operation when transmitting the compression difference data D9 and the shift amount data D20 from the production apparatus 100 to the distribution server apparatus 600.
- 10 is a flowchart showing an operation of reproducing content by the reproduction apparatus 400.
- 10 is a flowchart showing an operation of Bit extended reproduction of content recorded on the recording medium 200.
- 10 is a flowchart showing an operation of preprocessing (1) in Bit extended reproduction of content recorded on the recording medium 200.
- 10 is a flowchart showing an operation of downloading compressed difference data or the like from a distribution server device 600 to a playback device 400.
- 10 is a flowchart showing an operation of Bit extended reproduction of content recorded on a recording medium 300.
- 12 is a flowchart showing an operation of preprocessing (2) in the bit extended reproduction of the content recorded on the recording medium 300.
- One aspect of the present invention is a production apparatus that produces distribution content including distribution video data, and includes original acquisition means for acquiring original video data, and conversion for reducing the gradation of the video with respect to the original video data.
- Distribution acquisition means for acquiring the distribution video data generated by performing, difference generation means for generating difference data between the original video data and the distribution video data, and output means for outputting the difference data Features.
- the reproduction apparatus since the difference data between the original video data and the distribution video data is generated and output, the reproduction apparatus uses the difference data to reproduce only the distribution content recorded on the recording medium. As a result, it is possible to reproduce an image with improved tone expression.
- the original video data and the distribution video data are each composed of a plurality of frames, each frame includes a plurality of pixels, each pixel includes primary color data for each primary color, and the difference generation means A difference calculation unit that calculates a difference between the primary color data in the primary video data and the primary color data in the distribution video data for each primary color in each pixel in each frame; and a reduction unit that reduces the bit length of the calculated difference;
- the difference data includes a plurality of frames, each frame includes a plurality of pixels, and each pixel may include the difference in which the bit length is reduced for each primary color.
- the difference generation means further generates a shift amount according to the value of the higher-order bits of the remaining portion excluding the sign bit indicating positive / negative among the differences calculated by the difference calculation unit.
- a reduction unit may be included, and the reduction unit may reduce the bit length of the difference based on the generated shift amount.
- the higher order bits of the remaining part excluding the sign bit indicating positive and negative are often 0 values, and the difference length is reduced by reducing the bit length of the difference based on the generated shift amount.
- the bit length of the difference can be effectively reduced without missing an effective value.
- the shift amount generation unit may generate the shift amount according to the number of consecutive 0 values in the higher-order bits of the remaining portion.
- the bit length of the difference can be effectively reduced without missing the effective value of the difference.
- the shift amount generation unit may generate one shift amount for one frame.
- the capacity of the entire shift amount can be reduced as compared with the case of generating the shift amount for each pixel included in one frame.
- the output unit may output the distribution content by writing it on a recording medium, and may write the difference data and the shift amount in association with the distribution content on the recording medium.
- the output unit may output the distribution content by writing it on a recording medium, and may further transmit the difference data and the shift amount to the server device in association with the distribution content.
- the reproduction device since the distribution content is recorded on the recording medium, and the difference data and the shift amount are transmitted to the server device, the reproduction device reads the distribution content from the recording medium, and By receiving the difference data and the shift amount from the server device, it is possible to reproduce a video with improved tone expression.
- Another aspect of the present invention is a production method used in a production apparatus for producing distribution content including distribution video data, an original acquisition step of acquiring original video data, and a video floor with respect to the original video data.
- a step is a production method used in a production apparatus for producing distribution content including distribution video data, an original acquisition step of acquiring original video data, and a video floor with respect to the original video data.
- the reproduction apparatus since the difference data between the original video data and the distribution video data is generated and output, the reproduction apparatus uses the difference data to reproduce only the distribution content recorded on the recording medium. As a result, it is possible to reproduce an image with improved tone expression.
- Another aspect of the present invention is a computer-readable recording medium on which a computer program used in a production apparatus that produces distribution content including distribution video data is recorded, and the original image data is acquired by the computer.
- An acquisition step a distribution acquisition step of acquiring the distribution video data generated by performing conversion that lowers the gradation of the video to the original video data, and difference data between the original video data and the distribution video data.
- generate and the output step which outputs the said difference data is recorded.
- the computer program recorded on this recording medium is executed by a computer, difference data between the original video data and the distribution video data is generated and output. Therefore, by using the difference data in the playback device, the recording medium Compared with the case where only the distributed content recorded in the video is reproduced, the video can be reproduced with improved tone expression.
- Another aspect of the present invention is a computer program used in a production apparatus that produces distribution content including distribution video data, the original acquisition step of acquiring original video data in the computer, and the original video data
- An output step of outputting is executed.
- this computer program When this computer program is executed by a computer, difference data between the original video data and the distribution video data is generated and output. Therefore, the distribution content recorded on the recording medium by using the difference data in the playback device As compared with the case where only the image is reproduced, there is an excellent effect that the image can be reproduced with the tone expression improved.
- Another aspect of the present invention is an integrated circuit that constitutes a production apparatus that produces distribution content including distribution video data, the original acquisition means for acquiring the original video data, and a video floor for the original video data.
- Distribution acquisition means for acquiring the distribution video data generated by performing conversion to reduce the tone
- difference generation means for generating difference data between the original video data and the distribution video data, and output for outputting the difference data Means.
- the reproduction apparatus since the difference data between the original video data and the distribution video data is generated and output, the reproduction apparatus uses the difference data to reproduce only the distribution content recorded on the recording medium. As a result, it is possible to reproduce an image with improved tone expression.
- Another aspect of the present invention is a content distribution system that includes a production device that produces distribution content including distribution video data and a playback device that reproduces the distribution content.
- An original acquisition means for acquiring, distribution acquisition means for acquiring the distribution video data generated by performing conversion for reducing the gradation of the image to the original video data, and the original video data and the distribution video data A difference generation unit configured to generate difference data; and an output unit configured to output the difference data.
- the playback device combines the difference acquisition unit that acquires the difference data, the distribution video data, and the difference data. And combining means for generating reproduced video data having the same gradation as the original video data, and reproducing means for reproducing the generated reproduced video data. And wherein the Rukoto.
- the production device generates and outputs difference data between the original video data and the distribution video data
- the reproduction device combines the distribution video data and the difference data to generate the reproduction video data.
- Embodiment 1 A content distribution system 10a as an embodiment according to the present invention will be described.
- the content distribution system 10a includes a production device 100a and a playback device 400a.
- the production apparatus 100a produces distribution content including distribution video data.
- the playback device 400a plays back the distributed content.
- the production apparatus 100a includes an original acquisition unit 101a, a distribution acquisition unit 102a, a difference generation unit 103a, and an output unit 104a as shown in FIG.
- the original acquisition unit 101a acquires original video data.
- the distribution acquisition unit 102a acquires the distribution video data generated by performing conversion that reduces the gradation of the video on the original video data.
- the difference generation unit 103a generates difference data between the original video data and the distribution video data.
- the output unit 104a outputs the difference data.
- the playback device 400a includes a difference acquisition unit 401a, a synthesis unit 402a, and a playback unit 403a.
- the difference acquisition unit 401a acquires the difference data.
- the synthesizer 402a synthesizes the distribution video data and the difference data to generate reproduced video data having a gradation equivalent to that of the original video data.
- the playback unit 403a plays back the generated playback video data.
- Each of the original video data and the distribution video data is composed of a plurality of frames, and each frame includes a plurality of pixels, and each pixel includes primary color data for each primary color.
- the difference generation unit 103a for each pixel in each frame, a difference calculation unit 108a (not shown) that calculates a difference between the primary color data in the original video data and the primary color data in the distribution video data for each primary color; A reduction unit 110a (not shown) that reduces the bit length of the calculated difference.
- the difference data is composed of a plurality of frames, and each frame includes a plurality of pixels, and each pixel includes the difference in which the bit length is reduced for each primary color.
- the difference generation unit 103a further generates a shift amount according to the value of the higher-order bits of the remaining part excluding the sign bit indicating positive / negative among the differences calculated by the difference calculation unit 108a.
- a generation unit 109a (not shown) is included.
- the reduction unit 110a reduces the bit length of the difference based on the generated shift amount.
- the shift amount generation unit 109a generates the shift amount according to the number of consecutive 0 values in the higher-order bits of the remaining portion.
- the shift amount generation unit 109a generates one shift amount for one frame.
- the output unit 104a outputs the distribution content by writing it on a recording medium, and further writes the difference data and the shift amount in association with the distribution content on the recording medium.
- the output unit 104a outputs the distribution content by writing it on a recording medium, and further transmits the difference data and the shift amount to the server device in association with the distribution content.
- Embodiment 2 A content distribution system 10 as another embodiment according to the present invention will be described.
- the content distribution system 10 includes a production device 100, a playback device 400, an external storage device 500, and a distribution server device 600 as shown in FIG.
- the production apparatus 100 and the distribution server apparatus 600 are connected via the network 20, and the distribution server apparatus 600 and the playback apparatus 400 are also connected via the network 20.
- the production apparatus 100 is loaded with a recording medium 200 and a recording medium 300, and the production apparatus 100 records content on the recording medium 200 and the recording medium 300.
- the playback device 400 is loaded with a recording medium 200 and a recording medium 300 on which content is recorded.
- An external storage device 500 is connected to the playback device 400.
- a producer of the recording medium 200 and the recording medium 300 has the production device 100, and a service provider that provides a service related to content has the distribution server device 600.
- This service provider provides a service for increasing the gradation of the content recorded on the recording medium 300.
- a content viewer has a playback device 400 and an external storage device 500.
- the production apparatus 100 Since the production apparatus 100 records on the recording medium based on the original content including the original video produced by the movie production company, the production device 100 produces the distribution content including the distribution video and records the produced distribution content on the recording medium. . Therefore, the original content produced by the movie production company does not circulate in the market as it is, and the recording medium recording the circulated content circulates in the market.
- An original video produced by a movie production company is composed of a plurality of frames.
- Each frame is composed of a plurality of pixels arranged in a matrix, and each pixel is a primary color for each of R, G, and B primary colors.
- each primary color data is 12 bits long as an example, and each primary color is expressed by 4096 gradations. That is, each primary color has a color depth of 12 bits.
- the distribution video recorded on the recording medium is composed of a plurality of frames, like the original video, and each frame is composed of a plurality of pixels arranged in a matrix, and each pixel has R,
- Each of the primary colors G and B has primary color data.
- each primary color data is 8 bits long, and each primary color is expressed by 256 gradations. That is, each primary color has an 8-bit color depth.
- each primary color of the original video produced by the movie production company is expressed by 4096 gradations.
- each primary color of the distribution video recorded on the recording medium is expressed by 256 gradations. This is because the capacity of data that can be recorded on the recording medium is limited.
- the data length of each primary color data of the distribution video recorded on the recording medium is defined as 8 bits.
- the data to be processed by each component in the production device 100 and the playback device 400 are expressed by being assigned the following codes.
- Original video D1 first converted video D2, compressed video D3, re-expanded video D4, shift re-expanded video D5, second converted video D6, difference data D7, fixed gradation difference data D8, compressed difference data D9, shifted video D10 , Shift difference data D11, composite video D12, shift composite video D13, shift amount data D20, recording medium identification ID (D21).
- FIG. 3 shows the configuration of the production device 100.
- the production apparatus 100 includes a video storage unit 101, a first conversion unit 102, a first compression unit 103, a first recording unit 104, a decompression unit 105, a reading unit 106, a shift unit 107, and a difference calculation unit. 108, a shift amount data generation unit 109, a reduction unit 110, a second compression unit 111, a storage unit 112, a second recording unit 113, a transmission unit 114, and a control unit 115.
- the difference calculation unit 108, the shift amount data generation unit 109, and the reduction unit 110 constitute a difference generation unit 116.
- the production apparatus 100 is specifically a computer system composed of a microprocessor, ROM, RAM, hard disk unit, and the like.
- a computer program is stored in the RAM or the hard disk unit.
- the microprocessor operates in accordance with the computer program, the first conversion unit 102, the first compression unit 103, the first recording unit 104, the expansion unit 105, the reading unit 106, the shift unit 107, and the difference calculation of the production apparatus 100 are performed.
- the unit 108, the shift amount data generation unit 109, the reduction unit 110, the second compression unit 111, the second recording unit 113, the transmission unit 114, the control unit 115, and the difference generation unit 116 achieve their functions.
- the production apparatus 100 produces distribution content including distribution video from original content including original video, and records the produced distribution content on a recording medium.
- each content includes video, audio data, subtitles, sub audio data, audio commentary, control information, and the like.
- video will be mainly described, and description of other information included in the content will be omitted.
- Video storage unit 101 As an example, the video storage unit 101 includes a hard disk unit.
- the video storage unit 101 stores an original video D1 composed of a plurality of frames.
- the original image D1 is an image itself produced by a movie production company.
- a plurality of frames constituting the original video D1 are continuously reproduced in time, thereby expressing a moving image.
- the original image D1 includes five frames F1, F2, F3, F4, and F5 as shown in FIG.
- each frame a plurality of pixels are arranged in a matrix.
- Each pixel has 12-bit primary color data for each of R, G, and B primary colors. Therefore, each primary color is expressed by 4096 gradations.
- one primary color (any of R, G, and B) 701a of one pixel in the frame F4 is expressed by 4096 gradations.
- the primary colors 702a, 703a, and 704a of other pixels in the frame F4 are also expressed by 4096 gradations, respectively.
- the gradation of the primary color 701a is visually represented by gradation expression 711a.
- the gradation expression 711a 4096 squares are arranged vertically, one gradation is represented by one square, and the gradation of the primary color 701a is represented by the number of squares hatched with diagonal lines. .
- the gradations of these primary colors are represented by the number of cells that are hatched in the gradation representations 712a, 713a, and 714a.
- the storage unit 112 includes a hard disk unit.
- the storage unit 112 includes an area for storing the compression difference data D9 and the shift amount data D20.
- First conversion unit 102 performs conversion for reducing the gradation of the video on the original video D1, and generates the generated first converted video D2.
- the first conversion unit 102 reads the original video D1 from the video storage unit 101, and performs first conversion on the primary color data for each primary color of each pixel in each frame of the read original video D1.
- the first conversion is an algorithm for converting 12-bit primary color data of the original video D1 into 8-bit primary color data.
- the first conversion converts a primary color expressed by 4096 gradations to a primary color expressed by 256 gradations.
- 12-bit primary color data is rounded (for example, rounded up) to generate 8-bit primary color data.
- the first conversion unit 102 performs the first conversion on each primary color data of the original video D1 to generate the first converted video D2.
- the first converted video D2 includes a plurality of frames. Each frame includes a plurality of pixels arranged in a matrix. Each pixel has primary color data for each of R, G, and B primary colors. Here, each primary color data is 8 bits long, and each primary color is expressed by 256 gradations.
- the 12-bit color depth in the original video D1 is used in the movie production process in the movie production company, and the 8-bit color depth is defined in the recording medium.
- This first conversion is necessary in order to convert an original video produced by a movie production company into a video with a color depth defined on the recording medium and record it on the recording medium.
- the first converted video D2 generated in this way includes frames F11, F12, F13, F14, and F15 respectively corresponding to the frames F1, F2, F3, F4, and F5 of the original video D1, as shown in FIG.
- a plurality of pixels are arranged in a matrix in each frame included in the first converted video D2.
- Each pixel has 8-bit primary color data for each of R, G, and B primary colors. Accordingly, each primary color is expressed by 256 gradations.
- one primary color (any of R, G, and B) 701b of one pixel in the frame F14 is expressed by 256 gradations.
- the primary colors 702b, 703b, and 704b of other pixels in the frame F14 are also expressed by 256 gradations.
- the gradation of the primary color 701b is visually represented by gradation expression 711b.
- gradation representation 711b 256 squares are arranged vertically, one gradation is represented by one square, and the gradation of the primary color 701b is represented by the number of squares hatched with diagonal lines.
- the gradations of these primary colors are represented by the number of cells that are hatched in the gradation representations 712b, 713b, and 714b.
- Each primary color data of the first converted video D2 shown in FIG. 4 is generated by converting each primary color data of the original video D1 having a 12-bit length into an 8-bit length, and therefore when rounded from a 12-bit length to an 8-bit length.
- some information of each primary color data of the original video D1 is missing.
- portions where information is missing are indicated by reference numerals 721b, 722b, 723b, and 724b.
- the first conversion unit 102 outputs the generated first converted video D2 to the first compression unit 103.
- First compression unit 103 receives the first converted video D2 from the first conversion unit 102 and applies a video compression algorithm to the received first converted video D2 to generate a compressed video D3.
- the video compression algorithm is publicly known and will not be described.
- the generated compressed video D3 is output to the first recording unit 104. Also, the generated compressed video D3 is output to the decompression unit 105.
- the compression algorithm includes, for example, a quantization code process, and information loss occurs in this process.
- the compressed video D3 is composed of a plurality of codes generated by a compression algorithm, and the color depth cannot be expressed as it is for the compressed video D3. Therefore, in order to explain the lack of information due to compression, a re-expanded video D4 obtained by further expanding the compressed video D3 is shown in FIG.
- the re-expanded video D4 shown in FIG. 4 includes frames F21, F22, F23, F24, and F25 corresponding to the frames F11, F12, F13, F14, and F15 of the first converted video D2, and is included in the re-expanded video D4.
- a plurality of pixels are arranged in a matrix.
- Each pixel has 8-bit primary color data for each of R, G, and B primary colors. Accordingly, each primary color is expressed by 256 gradations.
- one primary color (R, G, or B) 701c of one pixel in the frame F24 is expressed by 256 gradations.
- the primary colors 702c, 703c, and 704c of other pixels in the frame F24 are also expressed by 256 gradations.
- First recording unit 104 receives the compressed video D3 from the first compression unit 103 and writes the received compressed video D3 into the recording medium 200 and the recording medium 300.
- the decompression unit 105 receives the compressed video D3 from the first compression unit 103 or receives the compressed video D3 from the reading unit 106.
- a video decompression algorithm is applied to the compressed video D3 received from each to generate a re-expanded video D4.
- the decompressing unit 105 outputs the generated re-expanded video D4 to the shift unit 107.
- FIG. 5 An example of the re-expanded video D4 is shown in FIG.
- An example of the re-expanded video D4 illustrated in FIG. 5 is the same as the example of the re-expanded video D4 illustrated in FIG.
- Shift unit 107 receives the re-expanded video D4 from the expansion unit 105. Next, the shift unit 107 converts the primary color data of each pixel included in each frame of the received re-expanded video D4 so as to match the color depth of the original video D1 stored in the video storage unit 101. Are shifted to the higher bit side to generate a shifted re-expanded video D5, and the generated shifted re-expanded video D5 is output to the difference calculation unit 108.
- each primary color data of each pixel included in each frame of the original video D1 is 12 bits long
- each primary color data of each pixel included in each frame of the re-expanded video D4 is 8 bits long.
- the shift unit 107 shifts the primary color data of each pixel included in each frame of the re-expanded video D4 by 4 bits to the most significant bit side. Also, “0x0000” is packed in the least significant 4 bits.
- the numerical value following “0x” indicates a binary representation.
- the shift re-expanded video D5 is composed of the same number of frames as the number of frames included in the re-expanded video D4, and the frames F21, F22, F23, F24, and F25 of the re-expanded video D4.
- Each pixel has 12-bit primary color data for each of R, G, and B primary colors. Therefore, each primary color is expressed by 4096 gradations.
- one primary color (any one of R, G, and B) 701d of one pixel in the frame F34 is expressed by 4096 gradations.
- the primary colors 702d, 703d, and 704d of other pixels in the frame F34 are also expressed by 4096 gradations, respectively.
- each primary color has 256 gradations, but each primary color data is bit-shifted by 4 bits to the upper side, resulting in 4096 gradations.
- the shift amount may be the same value for any compressed video D3 stored in the recording medium 200 and the recording medium 300. Further, it may be changed for each logical reproduction unit (PlayList in BLU-RAY DISC (registered trademark)) in the recording medium 200 and the recording medium 300. Furthermore, it may be changed for each unit of compressed video D3 (Clip as referred to as BLU-RAY DISC (registered trademark)).
- Difference calculation unit 108 The difference calculation unit 108 reads the original video D1 from the video storage unit 101 and receives the shifted re-expanded video D5 from the shift unit 107.
- the difference data D7 includes the same number of frames as the number of frames included in the original video D1, each frame includes a plurality of pixels, and each pixel includes a difference calculated for each primary color.
- the difference data D7 obtained by the difference calculation unit 108 includes frames F41, F42, F43, F44 and F45 corresponding to the frames F1, F2, F3, F4 and F5 included in the original video D1, respectively.
- a plurality of pixels are arranged in a matrix. Each pixel has a 12-bit difference for each of R, G, and B primary colors.
- the frame F44 has a difference 701e for one primary color of one pixel and has differences 702e, 703e and 704e for the primary colors of other pixels.
- the difference 701e is 12 bits long.
- the most significant bit 701ea of the difference 701e is a sign bit. When the most significant bit 701ea is “0x0”, the difference 701e has a positive value, and when the most significant bit 701ea is “0x1”, the difference 701e has a negative value.
- the other bit string 701eb excluding the most significant bit 701ea indicates the absolute value of the numerical value represented by the difference 701e.
- the difference calculation unit 108 outputs the difference data D7 to the shift amount data generation unit 109 and the reduction unit 110.
- Shift amount data generation unit 109 receives the difference data D7 from the difference calculation unit 108.
- the shift amount data generation unit 109 determines the shift amount P for each frame included in the difference data D7 as follows.
- the shift amount P is temporarily determined as 4 bits.
- the shift amount data generation unit 109 calculates the difference for each primary color in each pixel of the frame. (Ii) Of the 12-bit difference, except for the most significant code bit, when the upper 4 bits are “0x0000”, the shift amount P is 4 bits.
- the shift amount P is determined in the order of (iv), (iii), and (ii) within one frame.
- the shift amount P is determined to be 0 bit for any one difference in one frame, the shift amount P is set to 0 bit for the frame.
- the shift amount P is not determined to be 0 bits for any difference within one frame, and the shift amount P is determined to be 2 bits for any one difference, the shift amount for that frame is determined. Let P be 2 bits.
- the shift amount data generation unit 109 generates shift amount data D20 including the shift amount P thus determined, outputs the generated shift amount data D20 to the reduction unit 110, and writes the generated shift amount data D20 to the storage unit 112. .
- the shift amount data D20 includes a frame number uniquely identifying a frame and a shift amount P in association with each other.
- the shift amount data D20 includes a plurality of sets including the frame number and the shift amount P.
- the first set includes a frame number 153 “1” and a shift amount 156 “2”
- the second set includes a frame number 155 “2” and a shift amount 156 “4”.
- the set consists of a frame number 157 “L” and a shift amount 158 “0”.
- the first group indicates that the shift amount P “2” is set for the frame identified by the frame number “1”, and the second group is for the frame identified by the frame number “2”.
- the shift amount P “4” is set
- the L-th group indicates that the shift amount P “0” is set for the frame identified by the frame number “L”.
- the shift amount data generation unit 109 may generate shift amount data including a plurality of sets each composed of a compressed video number for uniquely identifying a compressed video and a shift amount P. In this case, it is assumed that there is only one shift amount for one compressed video.
- FIG. 9 shows another example of the shift amount data D20 as shift amount data D20a.
- the shift amount data D20a includes an attribute 151 “shift amount” and a value 152. "2" is included in association. This indicates that the value 152 “2” is the shift amount.
- the shift amount data D20a shown in FIG. 9 indicates that the shift amount is fixed in a certain video unit. This can be realized by adding “attribute: shift amount” and “value: 2” to the control file recorded on the recording medium 200 and the recording medium 300. For example, by adding to the management file of BLU-RAY DISC (registered trademark), it is possible to specify the shift amount of the compressed differential data D9 in the BLU-RAY DISC (registered trademark).
- the shift amount data D20 and D20a are not necessarily recorded on the recording medium 200 separately from the compressed video D3, and may be embedded in the compressed video D3.
- the shift amount data generation unit 109 may generate shift amount data D20b including data D20b1 and data D20b2, as shown as an example in FIG.
- the data D20b2 is the same as the shift amount data D20 shown in FIG.
- the data D20b1 includes an attribute 155 “maximum shift amount” and a value 156 “4”.
- the maximum shift amount indicates the maximum shift amount among the shift amounts included in the data D20b2, and its value is “4”. Actually, in the data D20b2, the maximum shift amount is “4”.
- the maximum shift bit value when using the compressed differential data D9 recorded on the recording medium 200 and the recording medium 300 is used.
- the value can be transmitted to the playback device 400.
- the management file related to the recording medium 200 and the recording medium 300 in every unit such as a logical playback unit of the compressed video D3 (PlayList in BLU-RAY DISC (registered trademark), etc.), a compressed video D3 unit, etc. You may prescribe.
- the reduction unit 110 reduces the extra bits of the difference data D7 through the primary reduction process and the secondary reduction process, and the fixed gradation difference data D8 of fixed gradation that can be processed by the system. Is generated.
- compressed video has 8-bit gradation, and many system LSIs for BLU-RAY DISC (registered trademark) are optimized for decoding 8-bit gradation video.
- the gradation difference data D8 also has an 8-bit gradation, so that compatibility with LSI mounting is enhanced.
- the reduction unit 110 receives the shift amount data D20 from the shift amount data generation unit 109. Also, the difference data D7 is received from the difference calculation unit 108.
- the reduction unit 110 extracts the shift amount P corresponding to the frame from the shift amount data D20.
- the reduction unit 110 generates, for each frame included in the difference data D7, the fixed gradation difference data D8 through the primary reduction process and the secondary reduction process for the difference for each primary color in each pixel of the frame. To do.
- the reduction unit 110 removes a bit string corresponding to the shift amount P from the higher order of the difference, except for the sign bit in the difference.
- the shift amount P is 0, the original difference is maintained as it is.
- a primary reduction difference is generated.
- (B) Secondary Reduction Process The reduction unit 110 generates a fixed gradation difference as follows so that the bit length of the primary reduction difference is “8”.
- the reduction unit 110 determines whether or not the bit length of the primary reduction difference generated by the primary reduction process is “8”.
- the reduction unit 110 maintains the primary reduction difference as it is and sets it as a fixed gradation difference.
- the reduction unit 110 removes the lower bits of the primary reduction difference so that the bit length of the primary reduction difference is “8”. For example, when the bit length of the primary reduction difference is “10”, the lower 2 bits of the primary reduction difference are removed. In this way, lower-order bits are removed from the primary reduction difference to generate a fixed gradation difference.
- the reduction unit 110 thus generates the fixed gradation difference data D8.
- the fixed gradation difference data D8 is composed of the same number of frames as the number of frames included in the difference data D7.
- the fixed gradation difference data D8 includes frames F51, F52, F53, F54, and F55 corresponding to the frames F41, F42, F43, F44, and F45 of the difference data D7.
- a plurality of pixels are arranged in a matrix. Each pixel has a fixed gradation difference of 8 bits for each of R, G, and B primary colors.
- the reduction unit 110 outputs the generated fixed tone difference data D8 to the second compression unit 111.
- the reduction unit 110 does not reduce the differences 801e, 801f, and 801g as shown as an example in FIG. 8, and is the same primary reduction as the differences 801e, 801f, and 801g, respectively.
- Differences 802e, 802f, and 802g are generated.
- both or one of the two most significant bits is “0x1” except for the most significant code bits 801ea, 801fa, and 801ga.
- the reduction unit 110 reduces a 2-bit bit string from the difference.
- the reduction unit 110 removes the 2 bits “0x00” from the higher order for the differences 801b, 801c, and 801d except for the most significant code bit.
- Primary reduction differences 802b, 802c, and 802d are generated, respectively.
- the upper 2 bits are “0x00” and both or one of the third and fourth bits are , “0x1”.
- the reduction unit 110 reduces a 4-bit bit string from the difference.
- the reduction unit 110 removes the 4 bits “0x0000” from the higher order from the difference 801a except for the most significant code bit, and removes the primary reduction difference 802a. Is generated.
- the upper 4 bits are “0x0000” except for the most significant code bit 801aa.
- the primary reduction difference 802a is maintained as it is as the fixed gradation difference 803a.
- the primary reduction differences 802b, 802c, and 802d have a bit length of “10”, the least significant 2 bits are removed, and the remaining bit strings become fixed gradation differences 803b, 803c, and 803d.
- the primary reduction differences 802e, 802f, and 802g each have a bit length of “12”, so that the least significant 4 bits are removed, and the remaining bit string is a fixed gradation difference. 803e, 803f and 803g.
- Second compression unit 111 receives the fixed gradation difference data D8 from the reduction unit 110, applies a compression algorithm to the received fixed gradation difference data D8, and generates compression difference data D9.
- the compression algorithm is the same as the compression algorithm used in the first compression unit 103.
- the second compression unit 111 writes the generated compressed difference data D9 into the storage unit 112.
- Second recording unit 113 The second recording unit 113 reads the compression difference data D9 and the shift amount data D20 from the storage unit 112, and writes the read compression difference data D9 and shift amount data D20 to the recording medium 200.
- Reading unit 106 The reading unit 106 reads the compressed video D3 from the recording medium 300 and outputs the read compressed video D3 to the decompressing unit 105. Further, the recording medium identification ID (D21) is read from the recording medium 300, and the read recording medium identification ID (D21) is output to the transmission unit 114.
- Transmitter 114 The transmission unit 114 reads the compression difference data D9 and the shift amount data D20 from the storage unit 112, and transmits the read compression difference data D9 and shift amount data D20 to the distribution server device 600. In addition, the transmission unit 114 receives the recording medium identification ID (D21) from the reading unit 106, and transmits the received recording medium identification ID (D21) to the distribution server device 600.
- Control unit 115 controls the operations of all the components that make up the production apparatus 100.
- the first conversion unit 102 reads the original video D1 from the video storage unit 101, performs the first conversion, generates the first conversion video D2, and outputs the first conversion video D2 to the first compression unit 103 (step). S101).
- the first compression unit 103 applies a compression algorithm to the first converted video D2 received from the first conversion unit 102 to generate a compressed video D3, and the generated compressed video D3 is used as the expansion unit 105 and the first recording unit. It outputs to 104 (step S102).
- the first recording unit 104 receives the compressed video D3 from the first compression unit 103, and records the received compressed video D3 on the recording medium 200 and the recording medium 300 (step S103).
- the decompression unit 105 receives the compressed video D3 from the first compression unit 103 or the reading unit 106, applies a decompression algorithm to the received compressed video D3, generates a re-expanded video D4, and generates the regenerated video D4.
- the expanded video D4 is output to the shift unit 107 (step S104).
- the shift unit 107 bit-shifts the primary color data of each pixel included in each frame of the re-expanded video D4 received from the expansion unit 105 to generate a shifted re-expanded video D5, and the generated shifted re-expanded video D5 is a difference. It outputs to the calculating part 108 (step S105).
- the difference calculation unit 108 calculates the difference between the primary color data of each pixel of each frame of the original video D1 and the primary color data of each pixel of each frame of the shifted re-expanded video D5, and obtains difference data D7 including the calculated difference.
- the generated difference data D7 is output to the shift amount data generation unit 109 and the reduction unit 110 (step S106).
- the shift amount data generation unit 109 generates shift amount data D20 from the difference data D7, outputs the generated shift amount data D20 to the reduction unit 110, and writes the generated shift amount data to the storage unit 112 (step S107).
- the reduction unit 110 generates fixed gradation difference data D8 from the difference data D7, and outputs the generated fixed gradation difference data D8 to the second compression unit 111 (step S108).
- the second compression unit 111 applies a compression algorithm to the fixed tone difference data D8 received from the reduction unit 110, generates compression difference data D9, and writes the generated compression difference data D9 to the storage unit 112 (step S109). .
- the second recording unit 113 writes the compressed difference data D9 and the shift amount data D20 read from the storage unit 112 to the recording medium 200 (step S110).
- the reading unit 106 outputs the compressed video D3 read from the recording medium 300 to the decompressing unit 105 (step S111).
- the transmission unit 114 transmits the compressed difference data D9 and the shift amount data D20 read from the storage unit 112 to the distribution server device 600 (step S112).
- FIG. 13 shows the data structure of the recording medium 200.
- the recording medium 200 includes a recording medium identification ID storage area 210, a compressed video storage area 220, a compressed difference data storage area 230, and a shift amount data storage area 240.
- the recording medium identification ID storage area 210 is an area for storing a recording medium identification ID (D21).
- a recording medium identification ID D21
- BLU-RAY DISC registered trademark
- a Content Certificate ID that is a partial area of an AACS Content Certificate File recorded in an AACS directory.
- the compressed video storage area 220 is an area for storing the compressed video D3.
- BLU-RAY DISC registered trademark
- an M2TS file is recorded in the STREAM directory under the BDMV directory, and this is an example of the compressed video D3.
- the compression difference data storage area 230 is an area for storing the compression difference data D9.
- the shift amount data storage area 240 is an area for storing the shift amount data D20.
- FIG. 14 shows the data structure of the recording medium 300.
- the recording medium 300 includes a recording medium identification ID storage area 310 and a compressed video storage area 320 as shown in FIG.
- the recording medium 300 does not record the compression difference data D9 and the shift amount data D20.
- the recording medium identification ID storage area 310 is an area for storing a recording medium identification ID (D22).
- a recording medium identification ID D22
- BLU-RAY DISC registered trademark
- a Content Certificate ID that is a partial area of the AACS Content Certificate File recorded in the AACS directory.
- the compressed video storage area 320 is an area for storing the compressed video D3.
- BLU-RAY DISC registered trademark
- an M2TS file is recorded in the STREAM directory under the BDMV directory, and this is an example of the compressed video D3.
- the playback device 400 plays back the distributed content recorded on the recording medium.
- FIG. 15 shows the configuration of the playback apparatus 400.
- the playback device 400 includes a reading unit 401, a first decompression unit 402, a first shift unit 403, a synthesis unit 404, a third shift unit 405, an output unit 406, a shift amount analysis unit 407, a second The expansion unit 408, the second shift unit 409, the transmission unit 410, the built-in storage unit 411, the recording unit 412, the reception unit 413, and the control unit 414 are configured.
- the playback device 400 is a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, and the like.
- a computer program is stored in the RAM or the hard disk unit.
- the microprocessor operates according to the computer program, the reading unit 401, the first decompressing unit 402, the first shifting unit 403, the synthesizing unit 404, the third shifting unit 405, the output unit 406, the shift amount of the playback device 400.
- the analysis unit 407, the second expansion unit 408, the second shift unit 409, the transmission unit 410, the recording unit 412, the reception unit 413, and the control unit 414 achieve their functions.
- the built-in storage unit 411 includes a hard disk unit as an example.
- the built-in storage unit 411 includes an area for storing the compression difference data D9 and the shift amount data D20.
- Reading unit 401 The reading unit 401 reads the compressed video D3, the compressed differential data D9, and the shift amount data D20 from the recording medium 200, outputs the read compressed video D3 to the first decompressing unit 402, and outputs the read compressed differential data D9 to the second The data is output to the decompression unit 408, and the read shift amount data D20 is output to the shift amount analysis unit 407.
- the reading unit 401 reads the compressed video D3 and the recording medium identification ID (D21) from the recording medium 300, outputs the read compressed video D3 to the first decompression unit 402, and reads the read recording medium identification ID (D21). Is output to the transmission unit 410.
- the reading unit 401 reads the compression difference data D9 and the shift amount data D20 from either the external storage device 500 or the built-in storage unit 411, and outputs the read compression difference data D9 to the second decompression unit 408.
- the read shift amount data D20 is output to the shift amount analysis unit 407.
- Second extension unit 408 The second decompression unit 408 decompresses the compressed difference data D9 received from the reading unit 401, generates fixed gradation difference data D8, and outputs the generated fixed gradation difference data D8 to the second shift unit 409.
- FIG. 17 shows an example of the fixed gradation difference data D8.
- Shift amount analysis unit 407 stores an offset shift amount N in advance.
- the offset shift amount N is a value determined by an output destination device from the playback device 400, and when a video is processed in the output destination device, each primary color of a pixel in the video requested by the output destination device. The bit length of the data.
- the shift amount analysis unit 407 reads the offset shift amount N.
- the shift amount analysis unit 407 receives the shift amount data D20 from the reading unit 401. Upon receiving the shift amount data D20, the shift amount analysis unit 407 analyzes the received shift amount data D20.
- the shift amount analysis unit 407 reads the value 152 “2” as the shift amount P from the shift amount data D20. .
- the shift amount analysis unit 407 calculates the frame numbers and shift amounts of each set from the shift amount data D20. read out.
- the read shift amount is defined as a shift amount P.
- the shift amount analysis unit 407 reads the compressed video numbers and shift amounts of each set from the shift amount data D20.
- the read shift amount is defined as a shift amount P.
- the shift amount analysis unit 407 reads the value 156 “4” from the shift amount data D20b as the maximum shift amount. Further, a plurality of sets D20b2 of frame numbers and shift amounts are read out.
- the read shift amount is defined as a shift amount P.
- the maximum shift amount read from the shift amount data D20b is set as the offset shift amount M.
- the maximum shift amount is extracted from the shift amount data D20, and the extracted maximum shift amount is set as the maximum shift amount.
- the shift amount is set as an offset shift amount M.
- the received shift amount data is of the type shown in FIG. 9, the shift amount of each pixel is confirmed in units of video frames, GOPs, scenes, etc., and the maximum shift amount is extracted from among them.
- the extracted maximum shift amount is set as an offset shift amount M.
- the shift amount analysis unit 407 outputs the offset shift amount M to the first shift unit 403 to instruct bit shift. Further, the shift amount analysis unit 407 outputs the shift amount (MP) to the second shift unit 409 to instruct bit shift. Further, the shift amount analysis unit 407 outputs a shift amount (NM) to the third shift unit 405 to instruct bit shift.
- Second shift unit 409 receives the shift amount (MP) from the shift amount analysis unit 407 together with a shift instruction. Also, the fixed gradation difference data D8 is received from the second decompression unit 408.
- the second shift unit 409 corresponds to the shift amount (MP) designated by the shift amount analysis unit 407 for each primary color data in each pixel of each frame of the fixed gradation difference data D8 received from the second decompression unit 408.
- Shift difference data D11 is generated by bit-shifting only.
- the fixed gradation difference data D8 includes frames F51, F52, F53, F54, and F55, and a plurality of pixels are arranged in a matrix in each frame.
- Each pixel has a fixed gradation difference of 8 bits for each of R, G, and B primary colors.
- the frame F54 includes fixed gradation differences 701f, 702f, 703f, and 704f.
- the fixed gradation difference 701f includes a sign bit 701fa and an absolute value 701fb as shown in FIG.
- the second shift unit 409 maintains the sign bit 701fa as it is for the fixed gradation difference 701f, shifts the absolute value 701fb by (MP) bits to the upper side, and (MP) to the lower side. ) Pack the bits “0x0”. In this way, the second shift unit 409 generates the shift difference 701h as shown as an example in FIG.
- the shift difference 701h is composed of a sign bit 701ha, an absolute value 701hb, and an absolute value 701hc.
- the sign bit 701ha has the same value as the sign bit 701fa.
- the absolute value 701hb has the same value as the absolute value 701fb.
- the absolute value 701hc is “0x0” of (MP) bits.
- the shift difference data D11 is composed of the same number of frames as the fixed gradation difference data D8 has. As shown in FIG. 17, the shift difference data D11 includes frames F71, F72, F73, F74, and F75 respectively corresponding to the frames F51, F52, F53, F54, and F55 of the fixed gradation difference data D8. A plurality of pixels are arranged in a matrix in each frame included in D11. Each pixel has a 12-bit shift difference for each of R, G, and B primary colors.
- the second shift unit 409 outputs the generated shift difference data D11 to the synthesis unit 404.
- First extension unit 402 The first decompressing unit 402 receives the compressed video D3 from the reading unit 401. Upon receiving the compressed video D3, the first decompression unit 402 performs a decompression algorithm on the received compressed video D3 to generate a re-expanded video D4.
- the decompression algorithm is the same as the decompression algorithm used in the decompression unit 105 of the production apparatus 100.
- the generated re-expanded video D4 is output to the first shift unit 403.
- FIG. 16 shows an example of the re-expanded video D4.
- the re-expanded video D4 includes frames F21, F22, F23, F24, and F25, and a plurality of pixels are arranged in a matrix in each frame included in the re-expanded video D4. .
- Each pixel has 8-bit primary color data for each of R, G, and B primary colors.
- the frame F24 includes a primary color 701c at one pixel, and includes primary colors 702c, 703c, and 704c at other pixels.
- First shift unit 403 receives an offset shift amount M along with a shift instruction from the shift amount analysis unit 407. Also, the re-expanded video D4 is received from the first expansion unit 402.
- the first shift unit 403 bit-shifts the primary color data in each pixel of each frame of the received re-expanded video D4 by the offset shift amount M specified by the shift amount analysis unit 407, and generates the shifted video D10. .
- FIG. 16 shows an example of the shift video D10.
- the primary color 701c of the re-expanded video D4 is 8 bits long.
- the first shift unit 403 bit-shifts the primary color 701c to the upper side by an offset shift amount M and packs M “0x0” s from the lowest. In this way, a primary color 701g is generated.
- the primary color 701g has the same value as the primary color 701c on the upper side, and M “0x0” on the lower side.
- the shifted video D10 generated in this way includes the same number of frames as the number of frames of the re-expanded video D4.
- the shift video D10 includes frames F61, F62, F63, F64, and F65 corresponding to the frames F21, F22, F23, F24, and F25 of the re-expanded video D4, and is included in the shift video D10.
- Each frame includes a plurality of pixels arranged in a matrix.
- Each pixel has 12-bit primary color data for each of R, G, and B primary colors. Therefore, each primary color is expressed by 4096 gradations. *
- the first shift unit 403 outputs the generated shift video D10 to the synthesis unit 404.
- Composition unit 404 The synthesizer 404 receives the shift video D10 from the first shift unit 403 and receives the shift difference data D11 from the second shift unit 409. When the shift video D10 and the shift difference data D11 are received, the primary color data of the shift video D10 and the primary color data of the shift difference data are added for each primary color data for each pixel of each frame to generate a composite video D12.
- the shift video D10 includes frames F61, F62, F63, F64, and F65 as shown in FIG. 18, and a plurality of pixels are arranged in a matrix in each frame included in the shift video D10. Yes.
- Each pixel has 12-bit primary color data for each of R, G, and B primary colors.
- the frame F64 includes primary colors 701g, 702g, 703g, and 704g.
- the shift difference data D11 includes frames F71, F72, F73, F74, and F75.
- Each frame included in the shift difference data D11 includes a plurality of pixels in a matrix. It is arranged in.
- Each pixel has a 12-bit shift difference for each of R, G, and B primary colors.
- the frame F74 includes shift differences 701h, 702h, 703h, and 704h.
- the synthesizing unit 404 adds the primary color 701g and the shift difference 701h to generate the primary color 701i.
- the composite video D12 includes the same number of frames as the number of frames included in each of the shift video D10 and the shift difference data D11 as illustrated in FIG.
- the composite video D12 includes frames F81, F82, F83, F84, and F85 corresponding to the frames F61, F62, F63, F64, and F65 of the shift video D10, and is included in the composite video D12.
- a plurality of pixels are arranged in a matrix.
- Each pixel has 12-bit primary color data for each of R, G, and B primary colors. Therefore, each primary color has 4096 gradations.
- the synthesis unit 404 outputs the generated synthesized video D12 to the third shift unit 405.
- the re-expanded video D4 shown in FIG. 16 has 8-bit long primary color data, and each primary color has 256 gradations.
- the composite image D12 shown in FIG. 18 has each primary color data of 12-bit length, and each primary color has 4096 gradations. For this reason, it can be seen that the gradation expression is improved in the composite video D12.
- Third shift unit 405 receives the shift amount (NM) from the shift amount analysis unit 407 together with the shift instruction, and receives the composite video D12 from the synthesis unit 404.
- the third shift unit 405 bit-shifts the primary color data by the shift amount (NM) received from the shift amount analysis unit 407 for each primary color for each pixel of each frame of the received composite video D12. Then, the shift composite video D13 is generated. Next, the generated shift composite video D13 is output to the output unit 406.
- the shift composite video D13 includes a plurality of frames, and each frame has a plurality of pixels arranged in a matrix, and each pixel has primary color data for each primary color.
- Output unit 406 receives the shift composite video D13 from the third shift unit 405, performs image processing before output on the received shift composite video D13, and outputs the processed video to an external display device such as a monitor. To do.
- the transmission unit 410 receives the recording medium identification ID (D21) of the recording medium 300 from the reading unit 401, and transmits the received recording medium identification ID (D21) to the distribution server device 600.
- Receiver 413 The receiving unit 413 receives the compression difference data D9 and the shift amount data D20 from the distribution server device 600, and outputs the received compression difference data D9 and shift amount data D20 to the recording unit 412.
- the recording unit 412 receives the compression difference data D9 and the shift amount data D20 from the reception unit 413, and the received compression difference data D9 and the shift amount data D20 according to the instruction of the viewer of the playback device 400, the internal storage unit 411 and the external Recording is performed in any one of the storage devices 500.
- FIG. 19 shows the configuration of the external storage device 500.
- the external storage device 500 includes an information storage unit 501 and an input / output unit 502.
- the information storage unit 501 includes a recording medium identification ID storage area 510, a compression difference data storage area 520, and shift amount data.
- a storage area 530 is provided.
- the recording medium identification ID storage area 510 is an area for storing a recording medium identification ID (D21).
- a recording medium identification ID D21
- BLU-RAY DISC registered trademark
- a Content Certificate ID that is a partial area of the AACS Content Certificate File recorded in the AACS directory
- a ROM There is a Volume ID that is protected and recorded by Mark technology.
- the compression difference data storage area 520 is an area for storing the compression difference data D9.
- the recording medium 200 records the compressed differential data D9 in the recording medium 200.
- the recording medium 300 is produced without recording the compressed differential data D9, and in this case, it is conceivable to store it in the external storage device 500.
- the shift amount data storage area 530 is an area for storing the shift amount data D20.
- the recording medium 200 records the shift amount data D20 in the recording medium 200.
- the recording medium 300 is produced without recording the shift amount data D20. In this case, the recording medium 300 may be stored in the external storage device 500.
- Distribution server device 600 provides compressed difference data D9 and shift amount data D20 to playback device 400 that the viewer has.
- FIG. 20 shows the configuration of the distribution server device 600.
- the distribution server device 600 includes a reception unit 610, an information storage unit 620, a transmission unit 630, and a control unit 640.
- the distribution server device 600 is specifically a computer system composed of a microprocessor, ROM, RAM, hard disk unit, and the like. A computer program is stored in the RAM or the hard disk unit. The distribution server device 600 achieves its functions by the microprocessor operating according to the computer program.
- Receiving unit 610 receives a recording medium identification ID (D21), compression difference data D9, and shift amount data D20 from the production apparatus 100.
- the receiving unit 610 receives the recording medium identification ID (D21) from the playback device 400.
- the receiving unit 610 sets the recording medium identification ID (D21), the compression difference data D9, and the shift amount data D20. Is output to the control unit 640.
- the recording medium identification ID (D21) is received from the playback device 400, the received recording medium identification ID (D21) is output to the control unit 640.
- Control unit 640 When receiving the recording medium identification ID (D21), the compression difference data D9, and the shift amount data D20 from the reception unit 610, the control unit 640 receives the recording medium identification ID (D21), the compression difference data D9, and the shift amount data D20. Are written in the information storage unit 620 as a set.
- control unit 640 When the control unit 640 receives the recording medium identification ID (D21) from the reception unit 610, the control unit 640 stores the compressed differential data D9 and the information stored in the information storage unit 620 corresponding to the received recording medium identification ID (D21).
- the transmission unit 630 is controlled so that the shift amount data D20 is read as a set, and the read compression difference data D9 and shift amount data D20 are transmitted to the playback device 400.
- the information storage unit 620 includes an area for storing the recording medium identification ID (D21), the compression difference data D9, and the shift amount data D20 received by the reception unit 610 as a set.
- the transmission unit 630 receives the compression difference data D9 and the shift amount data D20 from the control unit 640, and transmits the received compression difference data D9 and shift amount data D20 to the playback device 400.
- the control unit 115 of the production apparatus 100 receives user input from an input reception unit (not shown).
- the user input is an instruction for any one of production of the recording medium 200, production of the recording medium 300, and distribution to the distribution server device (step S201).
- the control unit 115 determines whether the input of the user is production of the recording medium 200, production of the recording medium 300, or distribution to the distribution server device (step S202).
- control unit 115 controls the production apparatus 100 to produce the recording medium 200 (step S202). S203).
- control unit 115 controls the production apparatus 100 to produce the recording medium 300 (step S202). S204).
- control unit 115 controls the production device 100 to transmit to the distribution server device. (Step S205).
- the first conversion unit 102 performs a first conversion on the original video D1 read from the video storage unit 101 to generate a first conversion video D2 (step S221), and the first compression unit 103 performs the first conversion video D2. Are compressed to generate a compressed video D3 (step S222), and the first recording unit 104 records the compressed video D3 on the recording medium 300 (step S223).
- the first conversion unit 102 performs a first conversion on the original video D1 read from the video storage unit 101 to generate a first conversion video D2 (step S240), and the first compression unit 103 performs the first conversion video.
- D2 is compressed to generate a compressed video D3 (step S241).
- the decompression unit 105 decompresses the compressed video D3 generated by the first compression unit 103 to generate a re-expanded video D4 (step S242).
- the shift unit 107 bit-shifts the re-expanded video D4 generated by the expansion unit 105 to generate a shifted re-expanded video D5 (step S243).
- the difference calculation unit 108 calculates the difference between the original image D1 and the shift re-expanded image D5, and generates difference data D7 (step S244).
- the shift amount data generation unit 109 generates shift amount data D20 (step S245).
- the reduction unit 110 generates fixed gradation difference data D8 (step S246).
- the second compression unit 111 compresses the fixed tone difference data D8 to generate compressed difference data D9 (step S247).
- the first recording unit 104 records the compressed video D3 on the recording medium 200 (step S248), and the second recording unit 113 stores the compressed difference data D9 and the shift amount data D20 stored in the storage unit 112. (Steps S249 to S250).
- the shift amount data generation unit 109 receives the difference data D7 from the difference calculation unit 108 (step S270).
- the shift amount data generation unit 109 repeats steps S272 to S282 shown below for every frame included in the difference data D7 (steps S271 to S283).
- the shift amount data generation unit 109 temporarily sets the shift amount P to “4” (step S272), and sets the determination flag SW to “0”.
- the shift amount data generation unit 109 repeats steps S275 to 277 shown below for each primary color data of all pixels in one frame (steps S274 to S278).
- the shift amount data generation unit 109 determines whether the most significant 2 bits excluding the sign bit in the primary color data for the primary color is “00” or other (“01”, “10” or “1” 1 ”) (step S275).
- the shift amount data generation unit 109 sets the shift amount P to “0” (step S281), and ends the repetition within one frame, and step S282. Transfer control to
- the shift amount data generation unit 109 performs the next subsequent to the most significant 2 bits excluding the sign bit. It is determined whether 2 bits are “00” or other (“01”, “10”, or “11”) (step S276).
- the shift amount data generation unit 109 does nothing.
- the shift amount data generation unit 109 sets the flag SW to “1” (step S277). ).
- Step S274 to S278 when the repetition for each primary color data of all the pixels in one frame is completed, the shift amount data generation unit 109 determines whether or not the flag SW is “1” (Step S279).
- the shift amount data generation unit 109 sets the shift amount P to “2” (step S280).
- the shift amount data generation unit 109 does nothing.
- the shift amount data generation unit 109 associates the frame number with the shift amount P and writes them in the shift amount data D20 (step S282).
- step S271 to S283 when the repetition for each frame ends, the shift amount data generation unit 109 ends the shift amount data generation processing.
- the reduction unit 110 receives the shift amount data D20 from the shift amount data generation unit 109, and receives the difference data D7 from the difference calculation unit 108 (step S340).
- the reduction unit 110 repeats steps S342 to S347 shown below for every frame included in the difference data D7 (steps S341 to S348).
- the reduction unit 110 extracts the shift amount P corresponding to the frame from the shift amount data D20 (step S342).
- the reduction unit 110 repeats the following steps S344 to 346 for each primary color data of all pixels in one frame (steps S343 to S347).
- the reduction unit 110 generates the primary reduction difference by removing the bit string by the shift amount P from the top, excluding the sign bit (step S344).
- the reduction unit 110 determines whether or not the bit length of the primary reduction difference is “8” (step S345). When it is determined that the bit length of the primary reduction difference is not “8” (step S345), the lower-order bits are deleted so that the bit length is “8” to generate a fixed gradation difference (step S346). When determining that the bit length of the primary reduction difference is “8” (step S345), the reduction unit 110 does nothing. In other words, the primary reduction difference is maintained and becomes a fixed gradation difference as it is.
- steps S343 to S347 the repetition for each primary color data of all pixels in one frame is completed.
- the reduction unit 110 generates fixed gradation difference data. Exit.
- the reading unit 106 of the production apparatus 100 reads the compressed video D3 from the recording medium 300 (step S301).
- the decompression unit 105 decompresses the read compressed video D3 to generate a re-expanded video D4 (step S302).
- the shift unit 107 bit-shifts the re-expanded video D4 to generate a shifted re-expanded video D5 (step S303).
- the difference calculation unit 108 calculates the difference between the original image D1 and the shift re-expanded image D5 stored in the image storage unit 101, and generates difference data D7 (step S304).
- the shift amount data generation unit 109 calculates the shift amount P using the difference data D7, and generates the shift amount data D20 (step S305).
- details of generation of the shift amount data D20 are as shown in FIG.
- the reduction unit 110 reduces the gradation of the difference data D7 and generates fixed gradation difference data D8 (step S306).
- details of generation of the fixed gradation difference data D8 are as shown in FIG.
- the second compression unit 111 compresses the fixed tone difference data D8 to generate compressed difference data D9, and writes the compressed difference data D9 in the storage unit 112 (step S307).
- the reading unit 106 reads the recording medium identification ID (D21) from the recording medium 300, and outputs the read recording medium identification ID (D21) to the transmission unit 114 (step S308).
- the transmission unit 114 receives the recording medium identification ID (D21) from the reading unit 106, reads the compression difference data D9 and the shift amount data D20 from the storage unit 112, and receives the received recording medium identification ID (D21) and the read compression difference data. D9 and shift amount data D20 are transmitted to distribution server device 600 (steps S309 to S311).
- the receiving unit 610 of the distribution server device 600 receives the recording medium identification ID (D21), the compression difference data D9, and the shift amount data D20 (steps S309 to S311), and the control unit 640 receives the received recording medium identification ID (D21). ), The compressed difference data D9 and the shift amount data D20 are written into the information storage unit 620 (step S312).
- the control unit 414 When a recording medium is inserted into the playback device 400 by the viewer (step S401), the control unit 414 records the compressed difference data D9 and the shift amount data D20 on the inserted recording medium via the reading unit 401. Judge whether or not. In other words, the type of the recording medium is determined (step S402). When it is determined that the compression difference data D9 and the shift amount data D20 are recorded on the recording medium, the recording medium is determined to be the recording medium 200. On the other hand, when it is determined that the compression difference data D9 and the shift amount data D20 are not recorded on the recording medium, the recording medium is determined to be the recording medium 300.
- the reproducing device 400 When the inserted recording medium is the recording medium 200 (“recording medium 200” in step S402), the reproducing device 400 performs the bit extended reproduction of the recording medium 200 (step S403). On the other hand, when the inserted recording medium is the recording medium 300 (“recording medium 300” in step S402), the playback device 400 downloads the compressed difference data and the like (step S404), and the bit extended playback of the recording medium 300 is performed. Is performed (step S405).
- the playback apparatus 400 uses the compressed video D3, the compressed differential data D9, and the shift amount data D20 recorded on the recording medium 200 to bit-extend the compressed video D3. Reproduce.
- the operation of the bit extended reproduction by the reproduction apparatus 400 of the content recorded on the recording medium 200 will be described with reference to the flowchart shown in FIG. The operation described here is the details of step S403 in FIG.
- the playback device 400 performs preprocessing (1) before playback of the compressed video D3 (step S410a). Details of the preprocessing (1) will be described later.
- the shift amount analysis unit 407 analyzes the shift amount data D20 read from the recording medium 200 by the reading unit 401, and checks whether the shift amount data D20 shown in FIG. It is confirmed whether or not the shift amount data D20a shown in 9 is described in units of the compressed video D3.
- the shift amount analysis unit 407 designates the shift amount P in the disk unit or the compressed video D3 unit to the second shift unit 409, and the bit amount An instruction is given to shift (step S412).
- the second decompressing unit 408 decompresses the compressed difference data D9 read from the recording medium 200 by the reading unit 401 to generate fixed tone difference data D8 (step S413).
- the second shift unit 409 calculates the actual shift amount (MP) bits using the offset shift amount (M bits) and the shift amount P specified by the shift amount analysis unit 407.
- the fixed gradation difference data D8 generated from all the compressed difference data D9 included in the disk is bit-shifted by (MP) bits to generate shift difference data D11
- compressed video In the case of D3 unit, the fixed gradation difference data D8 paired with the compressed video D3 is bit-shifted by (MP) bits to generate shift difference data D11 (step S414).
- the first decompressing unit 402 decompresses the compressed video D3 read from the recording medium 200 by the reading unit 401 and generates a re-expanded video D4 in parallel with the processing in step S412 and the processing in step S413 (step S415). ).
- the first shift unit 403 bit-shifts the re-expanded video D4 generated by the first expansion unit 402 by M bits according to the offset shift amount M specified by the shift amount analysis unit 407, and generates a shifted video D10 ( Step S416).
- the synthesizing unit 404 synthesizes the shift video D10 generated by the first shift unit 403 and the shift difference data D11 generated by the second shift unit to generate a synthesized video D12 (step S417).
- the third shift unit 405 bit-shifts the synthesized video D12 generated by the synthesizing unit 404 by NM bits according to the offset shift amount (N ⁇ M) specified by the shift amount analyzing unit 407, and generates the shifted synthesized video D13. Is generated. Further, the output unit 406 performs image processing or the like on the shift composite video D13 generated by the third shift unit 405, and outputs it to a monitor or the like (step S418).
- Read unit 401 reads shift amount data D20 from recording medium 200 (step S431).
- the shift amount analysis unit 407 analyzes the shift amount data D20 read from the recording medium 200 by the reading unit 401, and whether there is a maximum shift amount as shown in FIG. 11 in the shift amount data D20. It is confirmed whether or not (step S432).
- the maximum shift amount exists (“exists” in step S432)
- the maximum shift amount is set as the offset shift amount M (step S433).
- the maximum shift amount is extracted from the shift amount data D20, and the extracted maximum shift amount is set as the offset shift amount M (step S434).
- the shift amount analysis unit 407 designates M bits as the offset shift amount to the first shift unit 403 and the second shift unit 409 and instructs bit shift (steps S435 to S436).
- the shift amount analysis unit 407 designates (NM) bits as the offset shift amount to the third shift unit 405 and instructs bit shift (step S437).
- first shift unit 403, the second shift unit 409, the third shift unit 405, and the associated first decompression unit 402 and second decompression unit 408 are used for resource expansion necessary for bit extended reproduction such as application memory and data path. Securement is performed (S438).
- the reading unit 401 reads the compressed difference data D9 from the recording medium 200 (step S439), and reads the compressed video D3 from the recording medium 200 (step S440).
- the playback device 400 and the distribution server device 600 establish a communication connection (step S471).
- the reading unit 401 of the playback device 400 reads the recording medium identification ID (D21) from the recording medium 300 (step S472), and the transmission unit 410 reads the data together with the transmission request for the compression difference data D9 and the shift amount data D20.
- the recording medium identification ID (D21) is transmitted to the distribution server device 600 (step S473).
- the receiving unit 610 of the distribution server device 600 receives the transmission request and the recording medium identification ID (D21) (step S473), and the control unit 640 compresses the received recording medium identification ID (D21).
- the difference data D9 and the shift amount data D20 are read from the information storage unit 620 (step S474), and the transmission unit 630 transmits the read compressed difference data D9 and shift amount data D20 to the playback device 400 (step S475).
- the receiving unit 413 of the playback device 400 receives the compressed difference data D9 and the shift amount data D20 (step S475), and the recording unit 412 is associated with the read recording medium identification ID (D21).
- the received compressed difference data D9 and shift amount data D20 are written to either the external storage device 500 or the built-in storage unit 411 (step S476).
- the control unit 414 performs post-processing such as memory release (step S477).
- the playback apparatus 400 uses the compressed difference data D9 and the shift amount data D20 recorded in either the external storage device 500 or the built-in storage unit 411 to record the recording medium 300.
- the compressed video D3 recorded in the video is bit-extended and reproduced.
- the operation of the bit extended reproduction by the reproduction apparatus 400 of the content recorded on the recording medium 300 will be described with reference to the flowchart shown in FIG.
- the playback device 400 performs preprocessing (2) before playback of the compressed video D3 (step S410b).
- the reading unit 401 reads the recording medium identification ID (D21) from the recording medium 300 (step S451).
- the control unit 414 determines whether or not the recording medium identification ID (D21) read from the recording medium 300 exists in either the external storage device 500 or the built-in storage unit 411 (step 401). S452).
- the playback device 400 ends the content playback process. .
- the reading unit 401 When it is determined that the recording medium identification ID (D21) exists in either one of the external storage device 500 and the internal storage unit 411 (“exists” in step S452), the reading unit 401 reads the external storage device 500 and the internal storage unit 411.
- the compressed difference data D9 and the shift amount data D20 stored in correspondence with the recording medium identification ID (D21) read from the recording medium 300 are read from either one of the units 411 (step S453).
- steps S454 to S460 are the same as steps S432 to S438 shown in FIG.
- step S460 the reading unit 401 reads the compressed video D3 from the recording medium 300 (step S461).
- the production apparatus 100 generates difference information for compensating for missing information in the production process of the distribution content separately from the production of the distribution content, and the difference information data
- the standard gradation depth that can be effectively processed by the existing LSI is converted so that the size does not become too large and the difference information does not involve a significant design change of the existing LSI.
- a shift amount at the time of combination is determined and generated as meta information so that the result of combining the distribution content and the difference information can effectively improve the color tone.
- reproduction using the distribution content, the difference information, and the meta information holding the shift amount, and reproducing them in combination, the reproduction of the content in a state in which the color tone expression is improved as compared with the reproduction of only the distribution content is realized. .
- step S451 of FIG. 32 the reading unit 430 reads the recording medium identification ID (D21) from the recording medium 300, and in step S452, the read recording medium identification ID (D21) is stored in the external storage device 500 and the built-in storage. It is confirmed whether or not it is recorded in any of the sections 411.
- the playback device 400 executes the download process of the compressed difference data and the like shown in FIG. 30 and is necessary for playback.
- the compression difference data D9 and the shift amount data D20 corresponding to the recording medium identification ID (D21) may be acquired, and after the acquisition, the processing from step S454 onward in FIG. 32 may be executed.
- the first shift unit 403 and the third shift unit 405 make the shift amount unique to the disc, and only the second shift unit 409 has the compressed video D3. What is necessary is just to change the setting of the shift amount every time. Since only the second shift unit 409 is controlled by the shift amount analysis unit 407 at the switching timing of the compressed video D3 being played back, synchronized control is unnecessary, and it is possible to avoid a relatively complicated situation.
- the offset shift amount N bits are notified in advance to the third shift unit 405 before reproduction, and the shift amount is transmitted to the first shift unit 403 and the third shift unit 405 at the start of reproduction.
- P bit is designated, the first shift unit 403 is shifted to P bit, the third shift unit 405 is shifted to NP bit, and the second shift unit 409 is not shifted at all.
- Combination reproduction with the same shift amount as in the first mode is possible.
- the playback apparatus 400 does not need to mount the second shift unit 409, and can simplify the configuration.
- each of the above devices is a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, and the like.
- a computer program is stored in the RAM or the hard disk unit.
- the computer program is configured by combining a plurality of instruction codes indicating instructions for the computer in order to achieve a predetermined function.
- Each device achieves its function by the microprocessor operating according to the computer program. That is, the microprocessor reads each instruction included in the computer program one by one, decodes the read instruction, and operates according to the decoding result.
- each device is not limited to a computer system including all of a microprocessor, a ROM, a RAM, a hard disk unit, and the like, but may be a computer system including a part thereof.
- the microprocessor operates in accordance with instructions included in the computer program stored in the RAM or the hard disk unit, the computer program and the microprocessor constitute a single hardware circuit, and this hardware It can appear as if the circuit is operating.
- the system LSI is an ultra-multifunctional LSI manufactured by integrating a plurality of components on a single chip, and specifically, a computer system including a microprocessor, ROM, RAM, and the like. .
- a computer program is stored in the RAM.
- the system LSI achieves its functions by the microprocessor operating according to the computer program.
- each part of the constituent elements constituting each of the above devices may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
- LSI LSI
- IC system LSI
- super LSI ultra LSI depending on the degree of integration.
- circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- FPGA Field that can be programmed after LSI manufacturing
- Programmable Gate Array or a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- a part or all of the constituent elements constituting each of the above devices may be configured by an IC card or a single module that can be attached to and detached from each device.
- the IC card or the module is a computer system including a microprocessor, a ROM, a RAM, and the like.
- the IC card or the module may include the super multifunctional LSI described above.
- the IC card or the module achieves its function by the microprocessor operating according to the computer program. This IC card or this module may have tamper resistance.
- the present invention may be the method described above. Further, the present invention may be a computer program that realizes these methods by a computer, or may be a digital signal composed of the computer program.
- the present invention also provides a computer-readable recording medium such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (BLU-RAY DISC). (Registered trademark)) or a semiconductor memory. Further, the present invention may be the computer program or the digital signal recorded on these recording media.
- a computer-readable recording medium such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (BLU-RAY DISC). (Registered trademark)) or a semiconductor memory.
- the present invention may be the computer program or the digital signal recorded on these recording media.
- the computer program or the digital signal may be transmitted via an electric communication line, a wireless or wired communication line, a network represented by the Internet, a data broadcast, or the like.
- the present invention may also be a computer system including a microprocessor and a memory.
- the memory may store the computer program, and the microprocessor may operate according to the computer program.
- the program or the digital signal is recorded on the recording medium and transferred, or the program or the digital signal is transferred via the network or the like, and is executed by another independent computer system. It is good.
- the present invention is the playback device used in a playback system including a playback device, a recording medium, and a production device.
- the reproducing apparatus includes: a first decompressing unit that decompresses a compressed video; a second decompressing unit; a shift amount analyzing unit that analyzes shift amount data; a first shift unit that bit-shifts a video; The first decompression unit decompresses the content read by the playback device, the second decompression unit decompresses the differential data read by the playback device, and the shift amount analysis unit includes the shift amount.
- Analyzing data and instructing the first shift means to bit-shift the content wherein the first shift means bit-shifts the content expanded by the first expansion means in accordance with an instruction from the shift amount analysis means.
- the synthesizing unit synthesizes the content bit-shifted by the first shift unit and the difference data expanded by the second expansion unit.
- the playback device further includes a second shift unit, and the shift amount analysis unit analyzes the shift amount data read by the playback device, and performs a bit shift of content on the second shift unit.
- the second shift means bit-shifts the difference data expanded by the second expansion means in accordance with an instruction from the shift amount analysis means, and the composition means shifts the content shifted by the first shift means.
- the difference data shifted by the second shift means may be combined.
- the shift amount analyzing means may analyze the shift amount data every time the content is reproduced, and instruct the first shift means to bit-shift the content.
- the shift amount analyzing means may analyze the shift amount data every time the content is reproduced, and instruct the second shift means to bit-shift the content.
- another embodiment of the present invention is the production device used in a reproduction system including a reproduction device, a recording medium, and a production device.
- the production apparatus includes: expansion / shift means that performs bit shift after expanding an image; shift amount data generation means that generates shift amount data that records a shift amount when combining content and difference data; and the two images
- the shift amount data generation means generates the shift amount data based on the shift amount shifted by the expansion / shift means, and the difference calculation means includes the original video read by the playback device. Calculating the difference with the content expanded / shifted by the expansion / shift means to generate difference data, and the compression means By compressing the difference data unit is generated to produce a compressed difference data, said recording means to record the compressed difference data in the recording medium.
- the shift amount data generating means may generate the shift amount data for acquiring the shift amount and holding the shift amount for each video every time the video is produced.
- the difference information is generated to compensate for the missing information in the production process of the main content, and the data size of the difference information is not too large.
- the difference information is converted to a standard gradation depth that can be processed effectively so that the existing LSI does not involve a significant design change of the existing LSI.
- the shift amount at the time of combination is determined and generated as meta information so that the combined result of information can effectively improve the color tone.
- the main content, difference information, and meta information that holds the shift amount are combined and played back, and the playback of the content in a state in which the color tone expression is improved over the playback of the main content alone is performed. Realize.
- One aspect of the present invention is a production apparatus that produces distribution content including distribution video data, an original acquisition circuit that acquires original video data, and a conversion that lowers the gradation of an image with respect to the original video data
- an integrated circuit constituting a production apparatus that produces distribution content including distribution video data, an original acquisition circuit that acquires original video data, and a video for the original video data
- a distribution acquisition circuit that acquires the distribution video data generated by performing conversion that reduces the gradation of the image, a difference generation circuit that generates difference data between the original video data and the distribution video data, and outputs the difference data
- an output circuit that outputs the difference data
- a production apparatus for producing distribution content including distribution video data, a memory unit storing a computer program configured by combining a plurality of computer instructions, and the memory And a processor that reads out computer instructions one by one from the computer program stored in the computer, decodes the computer instructions, and operates in accordance with the decoded result.
- the computer program includes, in a processor, an original acquisition step of acquiring original video data, and a distribution acquisition step of acquiring the distribution video data generated by converting the original video data to reduce the gradation of video.
- a difference generation step for generating difference data between the original video data and the distribution video data and an output step circuit for outputting the difference data are executed.
- Another aspect of the present invention is a playback method used in a playback device that plays back distributed content, the difference acquisition step of acquiring difference data, and the distribution video data and the difference data are combined to generate the original data. It is characterized by comprising a synthesizing step for generating reproduced video data having the same gradation as the video data, and a reproducing step for reproducing the generated reproduced video data.
- Another aspect of the present invention is a computer-readable recording medium that records a computer program for reproduction used in a reproduction apparatus that reproduces distribution content, and a difference acquisition step of acquiring difference data in a computer Combining the distribution video data and the difference data to generate reproduction video data having a gradation equivalent to the original video data, and a reproduction step of reproducing the generated reproduction video data.
- a computer program for execution is recorded.
- Another aspect of the present invention is a computer program for reproduction used in a reproduction apparatus for reproducing distribution content, wherein the computer obtains a difference acquisition step for acquiring difference data, the distribution video data, and the difference data Are combined to generate reproduction video data having the same gradation as the original video data, and a reproduction step to reproduce the generated reproduction video data.
- Another aspect of the present invention is a playback device that plays back distribution content, and includes a difference acquisition unit that acquires difference data, the distribution video data and the difference data, and is equivalent to the original video data.
- the image processing apparatus includes a synthesizing unit that generates reproduction video data having gradation, and a reproduction unit that reproduces the generated reproduction video data.
- Another aspect of the present invention is a playback device for playing distributed content, comprising a difference acquisition circuit that acquires difference data, the distribution video data and the difference data, and equivalent to the original video data
- a synthesis circuit that generates reproduction video data having gradation and a reproduction circuit that reproduces the generated reproduction video data are provided.
- Another aspect of the present invention is an integrated circuit that constitutes a playback device that plays back distributed content, and combines a difference acquisition circuit that acquires difference data, the distribution video data and the difference data, and It is characterized by comprising a synthesis circuit for generating reproduced video data having the same gradation as the video data, and a reproducing circuit for reproducing the generated reproduced video data.
- a playback device that plays back distributed content, a memory unit that stores a computer program configured by combining a plurality of computer instructions, and a memory unit that stores the computer program. And a processor that reads out computer instructions one by one from the computer program, decodes the computer instructions, and operates according to the decoding result.
- the computer program generates a reproduction video data having a gradation equivalent to the original video data by synthesizing a difference acquisition step of acquiring differential data to the processor, and synthesizing the distribution video data and the difference data. A step and a reproduction step of reproducing the generated reproduction video data.
- the production apparatus Since the production apparatus according to the present invention generates and outputs difference data between the original video data and the distribution video data, only the distribution content recorded on the recording medium is reproduced by using the difference data in the reproduction apparatus. It is useful as a technique for producing a distribution content including distribution video data, which has an excellent effect that the content can be reproduced with the color tone expression improved.
- 10 10a Content distribution system 100, 100a Production device 200 Recording medium 300 Recording medium 400, 400a Playback device 500 External storage device 600 Distribution server device
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Abstract
Description
本発明に係る一の実施の形態としてのコンテンツ配信システム10aについて説明する。
本発明に係る別の実施の形態としてのコンテンツ配信システム10について説明する。
コンテンツ配信システム10は、図2に示すように、制作装置100、再生装置400、外部記憶装置500及び配信サーバ装置600から構成されている。制作装置100と配信サーバ装置600とは、ネットワーク20を介して接続され、配信サーバ装置600と再生装置400とも、ネットワーク20を介して接続されている。制作装置100には、記録媒体200及び記録媒体300が装着され、制作装置100は、記録媒体200及び記録媒体300にコンテンツを記録する。また、再生装置400には、コンテンツが記録された記録媒体200及び記録媒体300が装着される。再生装置400には、外部記憶装置500が接続されている。
図3に、制作装置100の構成を示す。
映像記憶部101は、一例として、ハードディスクユニットから構成されている。
記憶部112は、一例として、ハードディスクユニットから構成されている。
第1変換部102は、以下に示すようにして、原映像D1に対して映像の階調を低下させる変換を施して、生成した第1変換映像D2を生成する。
第1圧縮部103は、第1変換部102から第1変換映像D2を受け取り、受け取った第1変換映像D2に対して、映像の圧縮アルゴリズムを施して圧縮映像D3を生成する。ここで、映像の圧縮アルゴリズムについては、公知であり、説明を省略する。次に、生成した圧縮映像D3を第1記録部104へ出力する。また、生成した圧縮映像D3を伸張部105へ出力する。
第1記録部104は、第1圧縮部103から圧縮映像D3を受け取り、受け取った圧縮映像D3を記録媒体200及び記録媒体300に書き込む。
伸張部105は、第1圧縮部103から圧縮映像D3を受け取り、又は、読出部106から圧縮映像D3を受け取る。それぞれから受け取った圧縮映像D3に対して、映像の伸張アルゴリズムを施して、再伸張映像D4を生成する。ここで、伸張のアルゴリズムについては、公知であるので説明を省略する。次に、伸張部105は、生成した再伸張映像D4をシフト部107へ出力する。
シフト部107は、伸張部105から再伸張映像D4を受け取る。次に、シフト部107は、映像記憶部101に記憶されている原映像D1が有する色深度に一致するものとなるように、受け取った再伸張映像D4の各フレームに含まれる各ピクセルの原色データを上位ビット側にビットシフトして、シフト再伸張映像D5を生成し、生成したシフト再伸張映像D5を差分演算部108へ出力する。
差分演算部108は、映像記憶部101から原映像D1を読み出し、シフト部107からシフト再伸張映像D5を受け取る。
シフト量データ生成部109は、差分演算部108から差分データD7を受け取る。
(ii)12ビットの差分のうち、最上位の符号ビットを除いて、上位から4ビットが「0x0000」の場合、シフト量Pを4ビットとする。
「2」とを対応付けて含む。これは、値152「2」がシフト量であることを示している。図9に示すシフト量データD20aは、ある映像の単位において、シフト量が固定であることを示している。記録媒体200及び記録媒体300に記録されている制御ファイルに、「属性:シフト量」と「値:2」とが追加されることで実現が可能である。例えば、BLU-RAY DISC(登録商標)の管理ファイルに追加することで、BLU-RAY DISC(登録商標)内の圧縮差分データD9のシフト量を指定することが可能である。
削減部110は、次に示すように、一次削減プロセス及び二次削減プロセスを経て、差分データD7のうちの余分なビットを削減し、システムで処理可能な固定階調の固定階調差分データD8を生成する。BLU-RAY DISC(登録商標)では、圧縮映像が8ビット階調であり、BLU-RAY DISC(登録商標)向けシステムLSIも多くが8ビット階調映像のデコードに最適化していることから、固定階調差分データD8も8ビット階調とすることで、LSI実装と親和性が高まる。
削減部110は、差分内の符号ビットを除いて、差分の上位からシフト量P分だけのビット列を取り除く。シフト量Pが0の場合には、元の差分をそのまま維持する。こうして、一次削減差分を生成する。
削減部110は、一次削減差分について、そのビット長が「8」となるように、次に示すようにして、固定階調差分を生成する。
削減部110は、こうして固定階調差分データD8を生成する。
第2圧縮部111は、削減部110から固定階調差分データD8を受け取り、受け取った固定階調差分データD8に圧縮アルゴリズムを施して、圧縮差分データD9を生成する。
第2記録部113は、記憶部112から圧縮差分データD9及びシフト量データD20を読み出し、読み出した圧縮差分データD9及びシフト量データD20を記録媒体200に書き込む。
読出部106は、記録媒体300から圧縮映像D3を読み出し、読み出した圧縮映像D3を、伸張部105へ出力する。また、記録媒体300から、記録媒体識別ID(D21)を読み出し、読み出した記録媒体識別ID(D21)を送信部114へ出力する。
送信部114は、記憶部112から圧縮差分データD9及びシフト量データD20を読み出し、読み出した圧縮差分データD9及びシフト量データD20を配信サーバ装置600へ送信する。また、送信部114は、読出部106から記録媒体識別ID(D21)を受け取り、受け取った記録媒体識別ID(D21)を配信サーバ装置600へ送信する。
制御部115は、制作装置100を構成する全ての構成要素の動作を制御する。
制作装置100における記録媒体の制作プロセスについて、図12を用いて説明する。
図13に、記録媒体200のデータ構造を示す。
図14に、記録媒体300のデータ構造を示す。
再生装置400は、記録媒体に記録されている流通コンテンツを再生する。
内蔵記憶部411は、一例として、ハードディスクユニットから構成される。
読出部401は、記録媒体200から、圧縮映像D3、圧縮差分データD9及びシフト量データD20を読み出し、読み出した圧縮映像D3を第1伸張部402へ出力し、読み出した圧縮差分データD9を第2伸張部408へ出力し、読み出したシフト量データD20をシフト量解析部407へ出力する。
第2伸張部408は、読出部401から受け取った圧縮差分データD9を伸張し、固定階調差分データD8を生成し、生成した固定階調差分データD8を第2シフト部409へ出力する。
シフト量解析部407は、あらかじめ、オフセットシフト量Nを記憶している。オフセットシフト量Nは、再生装置400からの出力先の装置により定まる値であり、出力先の装置において映像が処理される際に、当該出力先の装置において要求される映像内のピクセルの各原色データのビット長である。
第2シフト部409は、シフト量解析部407から、シフトの指示とともに、シフト量(M-P)を受け取る。また、第2伸張部408から固定階調差分データD8を受け取る。
第1伸張部402は、読出部401から圧縮映像D3を受け取る。圧縮映像D3を受け取ると、第1伸張部402は、受け取った圧縮映像D3に伸張アルゴリズムを施して、再伸張映像D4を生成する。ここで、伸張アルゴリズムは、制作装置100の伸張部105において用いる伸張アルゴリズムと同一のものである。次に、生成した再伸張映像D4を第1シフト部403へ出力する。
第1シフト部403は、シフト量解析部407からシフトの指示とともに、オフセットシフト量Mを受け取る。また、第1伸張部402から再伸張映像D4を受け取る。
合成部404は、第1シフト部403からシフト映像D10を受け取り、第2シフト部409からシフト差分データD11を受け取る。シフト映像D10及びシフト差分データD11を受け取ると、各フレームの各ピクセルについて、原色データ毎に、シフト映像D10の原色データとシフト差分データの原色データとを加算し、合成映像D12を生成する。
第3シフト部405は、シフト量解析部407から、シフトの指示とともに、シフト量(N-M)を受け取り、合成部404から、合成映像D12を受け取る。
出力部406は、第3シフト部405からシフト合成映像D13を受け取り、受け取ったシフト合成映像D13に対して、出力前のイメージ加工を行い、加工後の映像をモニタなどの外部の表示装置へ出力する。
送信部410は、読出部401から、記録媒体300の記録媒体識別ID(D21)を受け取り、受け取った記録媒体識別ID(D21)を配信サーバ装置600に送信する。
受信部413は、配信サーバ装置600から、圧縮差分データD9及びシフト量データD20を受信し、受信した圧縮差分データD9及びシフト量データD20を記録部412へ出力する。
記録部412は、受信部413から圧縮差分データD9及びシフト量データD20を受信し、再生装置400の視聴者の指示に従って、受信した圧縮差分データD9及びシフト量データD20を内蔵記憶部411及び外部記憶装置500のいずれか一方に記録する。
図19に、外部記憶装置500の構成を示す。
配信サーバ装置600は、圧縮差分データD9及びシフト量データD20を視聴者が有する再生装置400に提供する。
受信部610は、制作装置100から、記録媒体識別ID(D21)、圧縮差分データD9、シフト量データD20を受信する。また、受信部610は、再生装置400から記録媒体識別ID(D21)を受信する。
制御部640は、受信部610から、記録媒体識別ID(D21)、圧縮差分データD9、シフト量データD20を受け取ると、受け取った記録媒体識別ID(D21)、圧縮差分データD9、シフト量データD20を、組として、情報記憶部620に書き込む。
情報記憶部620は、受信部610が受信した記録媒体識別ID(D21)、圧縮差分データD9、シフト量データD20を組として記憶するための領域を備える。
送信部630は、制御部640から、圧縮差分データD9及びシフト量データD20を受け取り、受け取った圧縮差分データD9及びシフト量データD20を、再生装置400に送信する。
コンテンツ配信システム10の動作について説明する。
制作装置100の動作について、図21に示すフローチャートを用いて説明する。
制作装置100による記録媒体300の制作の動作について、図22に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図21のステップS204の詳細である。
制作装置100による記録媒体200の制作の動作について、図23に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図21のステップS203の詳細である。
制作装置100のシフト量データ生成部109によるシフト量データの生成の動作について、図24に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図23のステップS245の詳細である。
1」)であるかを判断する(ステップS275)。
制作装置100の削減部110による固定階調差分データの生成の動作について、図25に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図23のステップS246の詳細である。
制作装置100から配信サーバ装置600へ圧縮差分データD9及びシフト量データD20を送信する際の動作について、図26に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図21のステップS205の詳細である。
再生装置400によるコンテンツの再生の動作について、図27に示すフローチャートを用いて説明する。
再生装置400は、記録媒体200に記録されている圧縮映像D3、圧縮差分データD9及びシフト量データD20を用いて、圧縮映像D3をビット拡張して再生する。ここでは、記録媒体200に記録されたコンテンツの再生装置400によるBit拡張再生の動作について、図28に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図27のステップS403の詳細である。
記録媒体200のBit拡張再生における前処理(1)の動作について、図29に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図28のステップS410aの詳細である。
再生装置400による圧縮差分データ等のダウンロードの動作について、図30に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図27のステップS404の詳細である。
再生装置400は、外部記憶装置500及び内蔵記憶部411のいずれかに記録されている圧縮差分データD9及びシフト量データD20を用いて、記録媒体300に記録されている圧縮映像D3をビット拡張して再生する。ここでは、記録媒体300に記録されたコンテンツの再生装置400によるBit拡張再生の動作について、図31に示すフローチャートを用いて説明する。
記録媒体300のBit拡張再生における前処理(2)の動作について、図32に示すフローチャートを用いて説明する。なお、ここで説明する動作は、図31のステップS410bの詳細である。
以上説明したように、制作装置100は、流通コンテンツの制作とは別に、流通コンテンツの制作工程で欠落した情報を補填するための差分情報の生成を行い、かつ、差分情報のデータサイズが大きくなりすぎないように、また、差分情報が既存のLSIの大幅な設計変更を伴わないように既存LSIが効果的に処理できる標準的な階調深度に変換する。また、階調深度の変換では、流通コンテンツと差分情報の組み合わせた結果が、効果的に色調改善できるように、組合せ時のシフト量を決めてこれをメタ情報として生成する。再生においては、流通コンテンツ、差分情報及びシフト量を保持したメタ情報を用いて、これらを組み合わせて再生し、流通コンテンツのみの再生よりも色調表現が改善された状態でのコンテンツの再生を実現する。
なお、本発明を上記の実施の形態に基づいて説明してきたが、本発明は、上記の実施の形態に限定されないのはもちろんである。以下のような場合も本発明に含まれる。
(Large Scale Integration:大規模集積回路)から構成されているとしてもよい。システムLSIは、複数の構成部を1個のチップ上に集積して製造された超多機能LSIであり、具体的には、マイクロプロセッサ、ROM、RAMなどを含んで構成されるコンピュータシステムである。前記RAMには、コンピュータプログラムが記憶されている。前記マイクロプロセッサが、前記コンピュータプログラムに従って動作することにより、システムLSIは、その機能を達成する。
Programmable Gate Array)やLSI内部の回路セルの接続や設定を再構成可能なリコンフィギュラブル・プロセッサを利用してもよい。
本発明の一の実施態様は、再生装置と記録媒体と制作装置から構成される再生システムで用いられる前記再生装置である。前記再生装置は、圧縮映像を伸張する第1伸張手段、第2伸張手段、シフト量データを解析するシフト量解析手段、映像をビットシフトする第1シフト手段及び複数の前記映像を合成する合成手段を備え、前記第1伸張手段は、前記再生装置が読み出したコンテンツを伸張し、前記第2伸張手段は、前記再生装置が読み出した差分データを伸張し、前記シフト量解析手段は、前記シフト量データを解析して、前記第1シフト手段に前記コンテンツのビットシフトを指示し、前記第1シフト手段は、前記シフト量解析手段の指示に従って、前記第1伸張手段が伸張した前記コンテンツをビットシフトさせ、前記合成手段は、前記第1シフト手段がビットシフトした前記コンテンツと、前記第2伸張手段が伸張した前記差分データを合成することを特徴とする。
100、100a 制作装置
200 記録媒体
300 記録媒体
400、400a 再生装置
500 外部記憶装置
600 配信サーバ装置
Claims (12)
- 流通映像データを含む流通コンテンツを制作する制作装置であって、
原映像データを取得する原取得手段と、
前記原映像データに対して映像の階調を低下させる変換を施して生成した前記流通映像データを取得する流通取得手段と、
前記原映像データと前記流通映像データとの差分データを生成する差分生成手段と、
前記差分データを出力する出力手段と
を備えることを特徴とする制作装置。 - 前記原映像データ及び前記流通映像データは、それぞれ、複数のフレームから構成され、各フレームは、複数のピクセルを含み、各ピクセルは、原色毎に原色データを含み、
前記差分生成手段は、
各フレーム内の各ピクセルについて原色毎に、前記原映像データにおける原色データと前記流通映像データにおける原色データとの差分を算出する差分演算部と、
算出した差分のビット長を削減する削減部とを含み、
前記差分データは、複数のフレームから構成され、各フレームは、複数のピクセルを含み、各ピクセルは、原色毎に、ビット長が削減された前記差分を含む
ことを特徴とする請求項1に記載の制作装置。 - 前記差分生成手段は、さらに、
前記差分演算部により算出された前記差分のうち、正負を示す符号ビットを除く残り部分の上位側ビットの値に応じて、シフト量を生成するシフト量生成部を含み、
前記削減部は、生成されたシフト量に基づいて、前記差分のビット長を削減する
ことを特徴とする請求項2に記載の制作装置。 - 前記シフト量生成部は、前記残り部分の上位側ビットにおいて、連続する0値の数に応じて、前記シフト量を生成する
ことを特徴とする請求項3に記載の制作装置。 - 前記シフト量生成部は、一枚のフレームについて、一個の前記シフト量を生成する
ことを特徴とする請求項3に記載の制作装置。 - 前記出力手段は、前記流通コンテンツを記録媒体に書き込むことにより出力し、さらに、前記流通コンテンツに対応付けて前記差分データと前記シフト量とを前記記録媒体に書き込む
ことを特徴とする請求項3に記載の制作装置。 - 前記出力手段は、前記流通コンテンツを記録媒体に書き込むことにより出力し、さらに、前記流通コンテンツに対応付けて前記差分データと前記シフト量とをサーバ装置へ送信する
ことを特徴とする請求項3に記載の制作装置。 - 流通映像データを含む流通コンテンツを制作する制作装置で用いられる制作方法であって、
原映像データを取得する原取得ステップと、
前記原映像データに対して映像の階調を低下させる変換を施して生成した前記流通映像データを取得する流通取得ステップと、
前記原映像データと前記流通映像データとの差分データを生成する差分生成ステップと、
前記差分データを出力する出力ステップと
を含むことを特徴とする制作方法。 - 流通映像データを含む流通コンテンツを制作する制作装置で用いられるコンピュータプログラムを記録しているコンピュータ読取可能な記録媒体であって、
コンピュータに、
原映像データを取得する原取得ステップと、
前記原映像データに対して映像の階調を低下させる変換を施して生成した前記流通映像データを取得する流通取得ステップと、
前記原映像データと前記流通映像データとの差分データを生成する差分生成ステップと、
前記差分データを出力する出力ステップと
を実行させるためのコンピュータプログラムを記録している記録媒体。 - 流通映像データを含む流通コンテンツを制作する制作装置で用いられるコンピュータプログラムであって、
コンピュータに、
原映像データを取得する原取得ステップと、
前記原映像データに対して映像の階調を低下させる変換を施して生成した前記流通映像データを取得する流通取得ステップと、
前記原映像データと前記流通映像データとの差分データを生成する差分生成ステップと、
前記差分データを出力する出力ステップと
を実行させるためのコンピュータプログラム。 - 流通映像データを含む流通コンテンツを制作する制作装置を構成する集積回路であって、
原映像データを取得する原取得手段と、
前記原映像データに対して映像の階調を低下させる変換を施して生成した前記流通映像データを取得する流通取得手段と、
前記原映像データと前記流通映像データとの差分データを生成する差分生成手段と、
前記差分データを出力する出力手段と
を備えることを特徴とする集積回路。 - 流通映像データを含む流通コンテンツを制作する制作装置と前記流通コンテンツを再生する再生装置とから構成されるコンテンツ配信システムであって、
前記制作装置は、
原映像データを取得する原取得手段と、
前記原映像データに対して映像の階調を低下させる変換を施して生成した前記流通映像データを取得する流通取得手段と、
前記原映像データと前記流通映像データとの差分データを生成する差分生成手段と、
前記差分データを出力する出力手段とを備え、
前記再生装置は、
前記差分データを取得する差分取得手段と、
前記流通映像データと前記差分データとを合成して、前記原映像データと同等の階調を有する再生映像データを生成する合成手段と、
生成した前記再生映像データを再生する再生手段と
を備えることを特徴とするコンテンツ配信システム。
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US11245911B1 (en) * | 2020-05-12 | 2022-02-08 | Whirlwind 3D, LLC | Video encoder/decoder (codec) for real-time applications and size/b and width reduction |
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JP2001320682A (ja) * | 2000-02-29 | 2001-11-16 | Sony Corp | データ処理装置およびデータ処理方法、並びに記録媒体およびプログラム |
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US7609947B2 (en) | 2004-09-10 | 2009-10-27 | Panasonic Corporation | Method and apparatus for coordinating playback from multiple video sources |
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