WO2015004884A1 - Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image - Google Patents

Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image Download PDF

Info

Publication number
WO2015004884A1
WO2015004884A1 PCT/JP2014/003533 JP2014003533W WO2015004884A1 WO 2015004884 A1 WO2015004884 A1 WO 2015004884A1 JP 2014003533 W JP2014003533 W JP 2014003533W WO 2015004884 A1 WO2015004884 A1 WO 2015004884A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
encoding
decoding
flag
unit
Prior art date
Application number
PCT/JP2014/003533
Other languages
English (en)
Japanese (ja)
Inventor
寿郎 笹井
健吾 寺田
Original Assignee
パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2014116966A external-priority patent/JP6587046B2/ja
Application filed by パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ filed Critical パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Publication of WO2015004884A1 publication Critical patent/WO2015004884A1/fr
Priority to US14/950,738 priority Critical patent/US10230973B2/en
Priority to US16/253,672 priority patent/US10623760B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards

Definitions

  • the present invention relates to an image encoding method and an image decoding method.
  • H Image coding standards represented by the ITU-T standard called 26x and the ISO / IEC standard called MPEG-x are known. Further, HEVC (High Efficiency Video Coding) has been studied as the latest image coding standard (see Non-Patent Document 1).
  • JCT-VC Join Collaborative Team on Video Coding
  • JCTVC-L1003 “High Efficiency Video Coding (HEVC) text specification draft 10 (for FDIS & Last Call)” Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO / IEC JTC1 / SC29 / WG11 13th Meeting: Incheon, KR, 18C26H26C ) Range Extensions text specification: Draft 3 Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO / IEC JTC1 / SC29 / WG11, 5th Meeting: Geneva, CH3C, 24W 3 of High-Efficiency Video Coding
  • the encoded signal can be appropriately decoded.
  • an object of the present invention is to provide an image encoding method that can generate an encoded signal that can be appropriately decoded, or an image decoding method that can appropriately decode an encoded signal.
  • An image encoding method is an image encoding method for encoding an image, and includes a first flag indicating whether or not a predetermined extended standard of a predetermined image encoding standard is used.
  • the encoding method is included in the extended standard and is included in the difference signal of the target block
  • a second flag encoding step for encoding a second flag indicating whether or not a first method for encoding a difference between samples adjacent to each other is used; and the first method is used by the second flag.
  • An image decoding method is an image decoding method for decoding a bitstream obtained by encoding an image, and an extended standard of a predetermined image encoding standard is obtained from the bitstream.
  • the present invention can provide an image encoding method that can generate an encoded signal that can be appropriately decoded, or an image decoding method that can appropriately decode the encoded signal.
  • FIG. 6 is a diagram for explaining an image encoding or decoding method according to Embodiment 1.
  • FIG. 3 is a flowchart of image encoding or decoding processing according to Embodiment 1.
  • 10 is a flowchart of image encoding or decoding processing according to a modification of the first embodiment.
  • 3 is a flowchart of encoding or decoding processing according to Embodiment 1.
  • 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a diagram illustrating a configuration example of a bitstream according to Embodiment 1.
  • FIG. 6 is a block diagram of an image encoding device according to Embodiment 2.
  • FIG. 6 is a block diagram of an image decoding apparatus according to Embodiment 2.
  • FIG. It is a flowchart of the image coding method which concerns on embodiment. It is a flowchart of the image coding method which concerns on the modification of embodiment. It is a flowchart of the image decoding method which concerns on embodiment. It is a flowchart of the image decoding method which concerns on the modification of embodiment.
  • FIG. 13 is an overall configuration diagram of a content supply system that implements a content distribution service.
  • FIG. 14 is an overall configuration diagram of a digital broadcasting system.
  • FIG. 15 is a block diagram illustrating a configuration example of a television.
  • FIG. 16 is a block diagram illustrating a configuration example of an information reproducing / recording unit that reads and writes information from and on a recording medium that is an optical disk.
  • FIG. 17 is a diagram illustrating a structure example of a recording medium that is an optical disk.
  • FIG. 18A illustrates an example of a mobile phone.
  • FIG. 18B is a block diagram illustrating a configuration example of a mobile phone.
  • FIG. 19 is a diagram showing a structure of multiplexed data.
  • FIG. 20 is a diagram schematically showing how each stream is multiplexed in the multiplexed data.
  • FIG. 21 is a diagram showing in more detail how the video stream is stored in the PES packet sequence.
  • FIG. 22 is a diagram illustrating the structure of TS packets and source packets in multiplexed data.
  • FIG. 23 is a diagram illustrating a data structure of the PMT.
  • FIG. 24 shows the internal structure of multiplexed data information.
  • FIG. 25 shows the internal structure of stream attribute information.
  • FIG. 26 is a diagram illustrating steps for identifying video data.
  • FIG. 27 is a block diagram illustrating a configuration example of an integrated circuit that realizes the moving picture coding method and the moving picture decoding method according to each embodiment.
  • FIG. 28 is a diagram showing a configuration for switching the drive frequency.
  • FIG. 29 is a diagram illustrating steps for identifying video data and switching between driving frequencies.
  • FIG. 30 is a diagram illustrating an example of a lookup table in which video data standards are associated with drive frequencies.
  • FIG. 31A is a diagram illustrating an example of a configuration for sharing a module of a signal processing unit.
  • FIG. 31B is a diagram illustrating another example of a configuration for sharing a module of a signal processing unit.
  • Non-Patent Document 1 Losless encoding in which an input signal matches a signal after encoding and decoding can be specified in units of blocks (see Non-Patent Document 1).
  • the encoding (or decoding) method differs in the lossless mode between the main standard of HEVC (Non-patent Document 1) and the extended standard (Non-Patent Document 2).
  • FIG. 1 is a flowchart of image encoding or decoding processing in the HEVC extended standard.
  • the apparatus determines whether the processing target block is a lossless block in which lossless is used (S101).
  • the apparatus acquires a prediction mode to be used (S102).
  • the prediction mode is a specific mode (vertical prediction or horizontal prediction) (Yes in S103)
  • the apparatus uses a DPCM (differential pulse-code modulation) process (S104).
  • DPCM is called differential pulse code modulation, and PCM-encodes the difference between adjacent samples in a block to be encoded. Thereby, compression efficiency can be raised simply.
  • a sample is an unprocessed pixel value or a pixel value after some prediction or conversion process is performed.
  • a residual signal that is a difference between an original image and a predicted image is calculated.
  • DPCM the difference between the target element and the element adjacent to the left or above the target element included in the residual signal is encoded or decoded.
  • the DPCM processing is described in detail in Non-Patent Document 2, Residual modification process for intra blocks.
  • the apparatus uses normal processing (encoding or decoding processing) (S105). Note that the normal processing is described in Non-Patent Documents 1 and 2.
  • Non-Patent Document 1 On the other hand, in the main standard of HEVC (Non-Patent Document 1), only normal processing (S105) exists, and processing when the condition in step S103 is satisfied is not defined. Accordingly, there is a problem that it is difficult to share a circuit between the main standard and the extended standard of HEVC.
  • the unit that can switch the profile of the standard is a unit including a plurality of pictures called a sequence. Therefore, information indicating whether the bitstream is a main standard or an extended standard (information indicating a profile) is included only in the header information of the sequence. For this reason, for example, when the image decoding apparatus receives data in units of pictures or slices that are finer than the sequence, there is a possibility of performing processing according to an incorrect standard. In such a case, it is difficult for the image decoding apparatus to find an error. That is, there is a problem that it is difficult to determine an error in the image decoding apparatus.
  • the profile is prepared so that a compression method suitable for various implementation variations such as digital storage media, television broadcasting, and real-time communication can be selectively used.
  • the profile is used to indicate interoperability in the implementation of the image decoding device. That is, the profile indicates the algorithms and restrictions that the image decoding apparatus corresponding to the profile needs to support.
  • the extended standard is an encoding technique that increases the processing load but increases the compression efficiency compared to the main standard, or conversely a technique that reduces the processing load by skipping normal processing. It is. In this way, the use of various optional functions can be permitted by defining the extended standard.
  • a transmission method such as syntax is determined in order to realize the above.
  • whether or not processing is to be performed is determined based on a flag sent in units of coding units that are units of encoding.
  • An image encoding method is an image encoding method for encoding an image, and includes a first flag indicating whether or not a predetermined extended standard of a predetermined image encoding standard is used.
  • the encoding method is included in the extended standard and is included in the difference signal of the target block
  • a second flag encoding step for encoding a second flag indicating whether or not a first method for encoding a difference between samples adjacent to each other is used; and the first method is used by the second flag.
  • the image encoding method encodes the second flag in addition to the first flag indicating the difference in the standard.
  • the image decoding apparatus can appropriately determine the encoding method by referring to the second flag when decoding the encoded signal generated by the image encoding method.
  • the image encoding method can generate an encoded signal that can be appropriately decoded.
  • the second flag may be written in a header of a sequence that is a unit including a plurality of pictures.
  • the image encoding step when the second flag indicates that the first method is not used, the image encoding step is an encoding method included in the image encoding standard, and the difference signal of the target block
  • the image may be encoded using a second method for encoding.
  • the image encoding method further encodes a third flag indicating whether or not a third method for predicting a color difference signal from a luminance signal is used, which is an encoding method included in the extended standard.
  • a third flag encoding step, and in the image encoding step, when the third flag indicates that the third method is used, the image may be encoded using the third method.
  • the third flag may be written in a header of a picture unit.
  • An image decoding method is an image decoding method for decoding a bitstream obtained by encoding an image, and an extension of a predetermined image encoding standard from the bitstream.
  • a second flag decoding step of decoding a second flag indicating whether or not a first method for encoding a difference between adjacent samples included in the difference signal of the target block is used from the bitstream;
  • the bit is a decoding scheme for decoding a signal encoded by the first scheme.
  • an image decoding step of decoding the image from a stream is an image decoding method for decoding a bitstream obtained by encoding an image, and an extension of a predetermined image encoding standard from the bitstream.
  • the image decoding method can appropriately determine the encoding method by referring to the second flag.
  • the image decoding method can appropriately decode the encoded signal.
  • the second flag may be decoded from a sequence header which is a unit including a plurality of pictures included in the bitstream.
  • the image decoding step when the second flag indicates that the first method is not used, the image decoding step is an encoding method included in the image encoding standard, and the difference signal of the target block
  • the image may be decoded from the bitstream by a decoding method that decodes a signal encoded by the second method for encoding.
  • the image decoding method further includes a third flag for decoding a third flag indicating whether or not a third method for predicting a color difference signal from a luminance signal is used, which is an encoding method included in the extended standard.
  • the third flag may be decoded from a header of a picture unit included in the bit stream.
  • An image encoding apparatus is an image encoding apparatus that encodes an image, and includes a processing circuit and a storage device that is accessible from the processing circuit. The image encoding method is executed using the storage device.
  • the image encoding apparatus encodes the second flag in addition to the first flag indicating the difference in the standard.
  • the image decoding apparatus can appropriately determine the encoding scheme by referring to the second flag when decoding the encoded signal generated by the image encoding apparatus. In this way, the image encoding apparatus can generate an encoded signal that can be appropriately decoded.
  • An image decoding apparatus is an image decoding apparatus that decodes a bitstream obtained by encoding an image, and includes a processing circuit and a storage device accessible from the processing circuit The processing circuit executes the image decoding method using the storage device.
  • the image decoding apparatus can appropriately determine the encoding method by referring to the second flag. In this way, the image decoding apparatus can appropriately decode the encoded signal.
  • the image encoding apparatus outputs appropriate information other than information for identifying a plurality of encoding methods (profiles). Thereby, a circuit can be shared. Moreover, it can respond to a some encoding system.
  • FIG. 2 is a diagram for explaining an image encoding or decoding method according to the present embodiment.
  • FIG. 2A is a table showing a state in which the present invention has a problem to be solved.
  • the processing for Condition 1 and Condition 2 differs between Method 1 and Method 2.
  • process A is used for both condition 1 and condition 2.
  • processing differs between condition 1 and condition 2.
  • the process A is used in the case of the condition 1
  • the process B is used in the case of the condition 2.
  • the system 1 is, for example, the existing HEVC system (main standard), and the system 2 is the HEVC extended system (extended standard).
  • Condition 1 is a case where lossless encoding is used and a specific mode is used, and condition 2 is a case other than that (a case where lossless encoding or a specific mode is not used).
  • lossless coding is a coding method that skips transform and quantization processing. In lossless encoding, no quantization error occurs, so that the same decoded image as the input image can be obtained.
  • the specific mode is a case where the prediction direction to be used is a specific direction, for example, a vertical direction, a horizontal direction, or a direction equivalent thereto.
  • the process A is a main standard normal process and is a process that does not use the DPCM. That is, a prediction image is generated by a normal prediction method, and a residual signal that is a difference between the input image and the prediction image is encoded.
  • the normal prediction method includes 35 prediction methods used in the in-plane prediction.
  • the 35 prediction methods include prediction in 33 directions, average value (DC) prediction, and planar prediction.
  • Process B is DPCM, which is a method for encoding the difference value of the residual signal of the adjacent pixels. Details of DPCM are described in Non-Patent Document 2.
  • the image decoding apparatus switches between method 1 and method 2 in accordance with the profile information included in the sequence header.
  • the sequence header is data output as a representative value in a sequence (a unit of a series of videos), and is data commonly used in the sequence.
  • the difference between method 1 and method 2 is only the process of switching between process A and process B according to condition 1 and condition 2. Even if the encoded signal includes information for switching between condition 1 and condition 2, independent information indicating which process A or process B is used is not included. For this reason, the image decoding apparatus needs to refer to the profile information described above.
  • video information (encoded signal) is transmitted using, for example, a network.
  • the accumulated stream information may be edited and divided.
  • the information of the sequence header may be lost due to a network error.
  • this information may be changed by mistake during editing. Even in such a case, if there is information indicating whether the process A or the process B is used separately from the profile information, the transmission apparatus or the editing apparatus detects an error using the information. it can. Therefore, a video signal including an error is not output.
  • the image decoding apparatus can decode the video signal.
  • the encoding assumption for example, method 1 is used
  • the decoding assumption for example, method 2 is used
  • FIG. 3 is a flowchart of the encoding process (or decoding process) according to the present embodiment.
  • the processing method (DPCM or normal processing) is not confirmed at the time of block processing as in the processing shown in FIG. 1, but the image encoding device (or image decoding device) As shown in FIG. 3, processing method information indicating a processing method used for encoding processing (or decoding processing) is encoded (or decoded) (S200). For example, this process is performed in an upper layer than the block layer, and the processes after step S201 are performed in units of blocks.
  • steps S201 to S205 are the same as S101 to S105 except for S203 (S103).
  • step S203 Whether the image encoding device (or image decoding device) uses processing B (DPCM) in step S203 by referring to the processing method information acquired in step S200, in addition to whether the mode is lossless and specific mode. Determine whether. Thus, by using the processing method information, the image encoding device (or image decoding device) does not need to access information indicating the profile (difference in encoding method), and stable encoding (or decoding) is possible. ) Processing can be executed.
  • processing B DPCM
  • the processing method information may include information indicating whether or not all blocks are lossless.
  • the processing method information when all are not lossless (method 2a), switching in step S203 is not required (always becomes NO), so that stable processing is possible. Become. If all are lossless, the processing method information further includes information indicating whether the processing is A or B. In general, when lossless is used, lossless is often used for all data or picture units. Therefore, the above method is effective.
  • the processing method information may include information indicating what encoding tool is used.
  • a scheme 2 includes a plurality of encoding tools, and uses the same encoding tool as the scheme 1 in the processing scheme information (for example, DPCM is not used) as shown in FIG. ) Is indicated, the switching in step S203 is not necessary, so that stable processing is possible.
  • DPCM DPCM
  • Method 1 the main standard of HEVC
  • processing methods other than DPCM are also used.
  • a method similar to the above can be applied.
  • the processing of the present embodiment may be applied to the LM mode (also called Intra_FromLuma mode), which is a prediction method for predicting a color difference signal from a luminance signal as another processing method.
  • the LM mode is described in detail in Non-Patent Document 3.
  • This LM mode is not adopted in the main standard of HEVC, but has an effect of improving the encoding efficiency.
  • Information indicating whether or not this LM mode is used may be included in the processing method information. This eliminates the need for the image decoding apparatus to refer to profile information in branch processing according to the processing method. In addition, in the image encoding device, it is possible to selectively use a tool that improves encoding efficiency.
  • the processing method information may include information indicating whether or not to change the order of coefficient scanning when conversion is skipped. This mode of changing the order of coefficient scanning when skipping conversion is not adopted in the main standard (method 1) of HEVC, but has an effect of improving encoding efficiency. Information indicating whether or not this mode is used may be included in the processing method information. This eliminates the need for the image decoding apparatus to refer to profile information in branch processing according to the processing method. In addition, in the image encoding device, a tool that improves encoding efficiency can be selectively used.
  • FIG. 4 shows a flowchart of processing when specialized in determining whether to use lossless.
  • the image encoding device encodes (or decodes) information indicating whether to use lossless (S301).
  • the image encoding device sets the processing set for lossless (for example, the process for DPCM) Set) is used (S303).
  • the image encoding device uses the same normal processing set as that of method 1 (S304).
  • this processing method information is output (encoded) in units of pictures.
  • FIG. 5 is a flowchart showing the processing (writing or reading) of the encoded stream. As shown in FIG. 5, sequence information (stream information), picture information, slice information, and block information are processed in this order in the encoded stream (S401 to S404 and S406 to S408). Further, the prediction process, the conversion process, and the quantization process are included in the block process (S405).
  • information indicating switching of the processing method is included in the lower order (smaller unit) than the sequence information.
  • information indicating that the lossless method is prohibited is included in the upper information. That is, by referring to this information, it is possible to determine that the process B is not used in the lower order. Thereby, the above-mentioned subject can be solved.
  • 6A to 6E are diagrams showing examples of the structure of the processing method information.
  • FIG. 6A is a diagram illustrating an example in which a flag (lossless_coding_flag) indicating whether or not lossless is used is encoded for a unit (VUI: Video Usability Information) in which video information is inserted.
  • VUI Video Usability Information
  • FIG. 6B is a diagram illustrating an example in which lossless_coding_flag is encoded (or decoded) when xxx_extension_flag is on (1).
  • xxx_extension_flag is a flag indicating whether or not to record a data structure for extended encoding in xxx units. That is, xxx_extension_flag indicates whether or not the HEVC extended standard is used. When xxx_extension_flag is off (0), lossless_coding_flag is not encoded (or decoded).
  • lossless_coding_flag indicates whether or not lossless is used for all encoded data included in the xxx unit.
  • the xxx_extension_flag is provided for each unit of sequence unit, picture unit, video unit, and slice unit. xxx is “sps” when the unit is sequence, “pps” when the unit is picture, “vps” when the unit is video, and “slice” if the unit is slice.
  • FIG. 6C is a diagram illustrating an example in which a flag (Dpcm_use_flag) indicating whether or not DPCM is used is used.
  • Dpcm_use_flag When Dpcm_use_flag is on (1), use of DPCM is permitted for all blocks included in the target unit.
  • Dpcm_use_flag When Dpcm_use_flag is off (0), DPCM is not used for all blocks included in the target unit (use is prohibited).
  • Dpcm_use_flag is encoded (or decoded) only when xxx_extension_flag is on (1).
  • FIG. 6D is a diagram illustrating an example in which a flag (LM_pred_use_flag) indicating whether or not a method of estimating a color difference signal from luminance, which is called LM mode, is used for prediction processing is used.
  • LM_pred_use_flag a flag indicating whether or not a method of estimating a color difference signal from luminance
  • LM_pred_use_flag When LM_pred_use_flag is on (1), use of the LM mode is permitted for all the blocks included in the target unit. Further, when LM_pred_use_flag is off (0), the LM mode is not used for all the blocks included in the target unit (use is prohibited).
  • LM_pred_use_flag is encoded (or decoded) only when xxx_extension_flag is on (1).
  • FIG. 6E is a diagram illustrating an example when Mp_tool_flag is used.
  • Mp_tool_flag is a flag indicating whether or not to use the same processing method as an existing encoding method (for example, a method called MainProfile or Main10Profile in Non-Patent Document 1).
  • Mp_tool_flag is encoded (or decoded) only when xxx_extension_flag is on (1).
  • these pieces of information are provided for each unit of sequence unit, picture unit, video unit, and slice unit.
  • the processing method can be controlled in finer units than the switching of the encoding method.
  • These pieces of information are information indicating a prediction method and the like, and are information related to the block processing part. Therefore, the reliability of data can be improved by using such information in addition to the profile information.
  • the processing can be made common even with different encoding methods, the circuit scale can be greatly reduced. Further, since the fact that the prediction method is different can be indicated in units of pictures or in units smaller than that, it is possible to suppress decoding using an incorrect prediction method. Therefore, the method according to the present embodiment has a very high practical effect in an environment where a data group in which a plurality of encoding methods are mixed is used.
  • the image encoding method according to the present embodiment can generate a code string that facilitates stable processing.
  • the image decoding method according to the present embodiment can decode the code string generated as described above. Further, according to the present embodiment, it is possible to reduce a portion that conventionally required a plurality of circuits. Also, the decoding processing load can be reduced. As a result, an image decoding device capable of high-speed computation can be realized at low cost.
  • Embodiment 2 In the present embodiment, an example of an image encoding device and an image decoding device that execute the image encoding method and the image decoding method described in Embodiment 1 will be described. Note that the characteristic processing of the present embodiment is executed by the control unit 111 and the control unit 209.
  • FIG. 7 is a block diagram showing an example of the configuration of the image encoding device 100 according to the present embodiment.
  • the image encoding device 100 generates an encoded signal 129 (encoded bit stream) by compressing and encoding the input image 121.
  • the input image 121 is input to the image encoding device 100 for each block.
  • the image encoding device 100 generates an encoded signal 129 by performing transformation, quantization, and variable length encoding on the input image 121 that has been input.
  • a subtractor 101 includes a subtractor 101, a transform quantization unit 102, an entropy coding unit 103, an inverse quantization inverse transform unit 104, an adder 105, and a deblocking processing unit 106.
  • a memory 107 includes an intra prediction unit 108, a motion compensation unit 109, a motion detection unit 110, a control unit 111, and a changeover switch 112.
  • the subtractor 101 calculates a residual signal 122 (also referred to as a prediction error or a difference signal) that is a difference between the input image 121 and the prediction signal 127.
  • a residual signal 122 also referred to as a prediction error or a difference signal
  • the transform quantization unit 102 transforms the spatial domain residual signal 122 into a frequency domain transform coefficient. For example, the transform quantization unit 102 generates a transform coefficient by performing DCT (Discrete Cosine Transform) transform on the residual signal 122. Further, the transform quantization unit 102 generates a quantized coefficient 123 by quantizing the transform coefficient.
  • DCT Discrete Cosine Transform
  • the entropy encoding unit 103 generates an encoded signal 129 by performing variable length encoding on the quantization coefficient 123.
  • the entropy encoding unit 103 encodes the motion data 128 (for example, a motion vector) detected by the motion detection unit 110 and includes the obtained signal in the encoded signal 129 for output.
  • the inverse quantization inverse transform unit 104 restores the transform coefficient by inversely quantizing the quantization coefficient 123. Further, the inverse quantization inverse transform unit 104 restores the residual signal 124 by inversely transforming the restored transform coefficient.
  • the restored residual signal 124 does not match the residual signal 122 generated by the subtractor 101 because a part of the information is lost due to quantization. That is, the restored residual signal 124 includes a quantization error.
  • the adder 105 generates the local decoded image 125 by adding the restored residual signal 124 and the prediction signal 127.
  • the deblocking processing unit 106 generates a local decoded image 126 by performing a deblocking filter process on the local decoded image 125.
  • the memory 107 is a memory for storing a reference image used for motion compensation. Specifically, the memory 107 stores the local decoded image 126 after the deblocking filter process is performed.
  • the processing of the transform quantization unit 102 and the inverse quantization inverse transform unit 104 is skipped, the residual signal 122 is input to the entropy encoding unit 103, and the input image 121 is stored in the memory 107. Is input.
  • the entropy encoding unit 103 performs variable length encoding on the calculated difference.
  • the intra prediction unit 108 generates a prediction signal (intra prediction signal) by performing intra prediction. Specifically, the intra prediction unit 108 performs intra prediction by referring to images around the encoding target block (the input image 121) in the local decoded image 125 generated by the adder 105, so that intra prediction is performed. Generate a signal.
  • the motion detection unit 110 detects motion data 128 (for example, a motion vector) between the input image 121 and the reference image stored in the memory 107.
  • motion data 128 for example, a motion vector
  • the motion compensation unit 109 generates a prediction signal (inter prediction signal) by performing motion compensation based on the detected motion data 128.
  • the changeover switch 112 selects either the intra prediction signal or the inter prediction signal, and outputs the selected signal to the subtracter 101 and the adder 105 as the prediction signal 127.
  • the image encoding apparatus 100 compresses and encodes image data.
  • the characteristic processing of the image coding method according to the first embodiment described above is data control, lossless (skipping of transformation and quantization processing), and processing mode (DPCM or the like) change processing. This is performed by the control unit 111.
  • FIG. 8 is a block diagram showing an example of the configuration of the image decoding apparatus 200 according to the present embodiment.
  • the image decoding apparatus 200 generates a decoded image 225 from the encoded signal 221 obtained by compressing and encoding the image.
  • the encoded signal 221 is, for example, the encoded signal 129 generated by the image encoding device 100.
  • the encoded signal 221 is input to the image decoding apparatus 200 as a decoding target signal for each block.
  • the image decoding apparatus 200 restores the decoded image 225 by performing variable length decoding, inverse quantization, and inverse transformation on the input decoding target signal.
  • An image decoding apparatus 200 illustrated in FIG. 8 includes an entropy decoding unit 201, an inverse quantization inverse transformation unit 202, an adder 203, a deblocking processing unit 204, a memory 205, an intra prediction unit 206, and a motion compensation unit. 207, a changeover switch 208, and a control unit 209.
  • the entropy decoding unit 201 restores the quantization coefficient 222 by variable-length decoding the encoded signal 221 (encoded stream).
  • the encoded signal 221 input stream
  • the entropy decoding unit 201 acquires the motion data 227 from the encoded signal 221 and outputs the acquired motion data 227 to the motion compensation unit 207.
  • the inverse quantization inverse transform unit 202 restores the transform coefficient by inversely quantizing the quantized coefficient 222 restored by the entropy decoding unit 201. Then, the inverse quantization inverse transform unit 202 restores the residual signal 223 (also referred to as a prediction error or a difference signal) by inversely transforming the restored transform coefficient.
  • the residual signal 223 also referred to as a prediction error or a difference signal
  • the adder 203 generates the decoded image 224 by adding the restored residual signal 223 and the prediction signal 226.
  • the deblocking processing unit 204 generates a decoded image 225 by performing a deblocking filter process on the generated decoded image 224.
  • the decoded image 225 after the deblocking filter processing is output to the outside.
  • the memory 205 is a memory for storing a reference image used for motion compensation. Specifically, the memory 205 stores the decoded image 225 after the deblocking filter process is performed.
  • the entropy decoding unit 201 decodes the residual signal 223 from the encoded signal 221 and the processing of the inverse quantization inverse transformation unit 202 is skipped. Further, the residual signal 223 obtained by the entropy decoding unit 201 is input to the adder 203.
  • the intra prediction unit 206 generates a prediction signal (intra prediction signal) by performing intra prediction. Specifically, the intra prediction unit 206 performs intra prediction with reference to images around the block to be decoded (encoded signal 221) in the decoded image 224 generated by the adder 203, whereby the intra prediction signal Is generated.
  • the motion compensation unit 207 generates a prediction signal (inter prediction signal) by performing motion compensation based on the motion data 227 output from the entropy decoding unit 201.
  • the changeover switch 208 selects either the intra prediction signal or the inter prediction signal, and outputs the selected signal to the adder 203 as the prediction signal 226.
  • the image decoding apparatus 200 decodes the decoded image 225 from the encoded signal 221 obtained by compressing and encoding the image.
  • the characteristic processing of the image decoding method according to the first embodiment described above is processing of data control, lossless (skipping of transform quantization processing), and processing mode (DPCM or the like) change. 209.
  • the image coding apparatus performs the processing shown in FIG.
  • the image encoding device encodes a first flag (xxx_extension_flag) indicating whether or not a predetermined extended standard of a predetermined image encoding standard is used (S501).
  • the first flag indicates a profile of a predetermined image coding standard. That is, the first flag indicates whether a predetermined processing method is used.
  • the image encoding apparatus includes the encoding block included in the extended standard and the difference signal (residual error) of the target block.
  • the second flag (Dpcm_use_flag) indicating whether or not the first method (DPCM) for encoding the difference between adjacent samples included in the signal is used is encoded (S503).
  • the image encoding apparatus writes the first flag and the second flag in any of a sequence unit header (a unit including a plurality of pictures), a picture unit header, a video unit header, and a slice unit header. .
  • a sequence unit header a unit including a plurality of pictures
  • a picture unit header a picture unit header
  • a video unit header a slice unit header.
  • the first flag and the second flag are written in the same header.
  • the image encoding device encodes an image using the first method (DPCM) (S505).
  • the image encoding device is an encoding method included in the image encoding standard, and includes the target block.
  • the image is encoded using the second method (normal method) for encoding the difference signal (S506).
  • the image encoding apparatus encodes an image using the second method (normal method) (S506).
  • the image coding apparatus may perform the processing shown in FIG.
  • the image encoding device encodes a first flag (xxx_extension_flag) indicating whether or not a predetermined extended standard of a predetermined image encoding standard is used (S511).
  • the first flag indicates a profile of a predetermined image coding standard. That is, the first flag indicates whether a predetermined processing method is used.
  • the image encoding device determines whether the third method (LM mode) for predicting the color difference signal from the luminance signal is used.
  • a third flag (LM_pred_use_flag) indicating this is encoded (S513).
  • the image encoding apparatus writes the first flag and the third flag in any of a sequence unit header (a unit including a plurality of pictures), a picture unit header, a video unit header, and a slice unit header. .
  • a sequence unit header a unit including a plurality of pictures
  • a picture unit header a picture unit header
  • a video unit header a slice unit header.
  • the first flag and the third flag are written in the same header.
  • the image encoding device encodes an image using the third method (LM mode) (S515).
  • the image encoding device is an encoding method included in the image encoding standard, and the target block The image is encoded using the second method (normal method) for encoding the difference signal (S516).
  • the image encoding device encodes an image using the second method (normal method) (S516).
  • the second flag and the third flag may be included in the same header or may be included in headers of different layers.
  • the corresponding first flag may be included in the same header as each of the second flag and the third flag.
  • sps_extension_flag and Dpcm_use_flag may be included in a sequence unit header (eg, SPS)
  • pps_extension_flag and LM_pred_use_flag may be included in a single picture header (eg, PPS).
  • the image decoding apparatus performs the process shown in FIG.
  • the image decoding apparatus decodes a first flag (xxx_extension_flag) indicating whether or not a predetermined extended standard of a predetermined image decoding standard is used from a bit stream (encoded signal) (S601).
  • the first flag indicates a profile of a predetermined image decoding standard. That is, the first flag indicates whether a predetermined processing method is used.
  • the image decoding apparatus is a decoding method included in the extended standard, and is included in the difference signal of the target block.
  • a second flag (Dpcm_use_flag) indicating whether or not the first method (DPCM) for decoding the difference between adjacent samples is used is decoded from the bitstream (S603).
  • the image decoding apparatus uses the first flag and the second flag as headers in sequence units (units including a plurality of pictures), headers in picture units, headers in video units, and headers in slice units, which are included in the bitstream. Decrypt from either For example, the first flag and the second flag are included in the same header.
  • the image decoding apparatus uses a decoding method for decoding the signal encoded by the first method (DPCM). Then, the image is decoded from the bit stream (S605).
  • the image decoding device is a decoding method included in the image decoding standard, and the difference signal of the target block An image is decoded from the bit stream by a decoding method for decoding a signal encoded by the second method (normal method) for encoding (S606).
  • the image decoding apparatus uses a decoding method for decoding a signal encoded by the second method (normal method), and uses a bit.
  • the image is decoded from the stream (S606).
  • the image decoding apparatus may perform the processing shown in FIG.
  • the image decoding apparatus decodes a first flag (xxx_extension_flag) indicating whether or not a predetermined extended standard of a predetermined image decoding standard is used from the bit stream (S611).
  • the first flag indicates a profile of a predetermined image decoding standard. That is, the first flag indicates whether a predetermined processing method is used.
  • the image decoding apparatus decodes the first flag and the third flag from any one of a sequence unit header (a unit including a plurality of pictures), a picture unit header, a video unit header, and a slice unit header. .
  • a sequence unit header a unit including a plurality of pictures
  • a picture unit header a picture unit header
  • a video unit header a slice unit header.
  • the first flag and the third flag are included in the same header.
  • the image decoding apparatus is a decoding method that decodes a signal encoded by the third method (LM mode).
  • the image is decoded from the bit stream (S615).
  • the image decoding device is a decoding method included in the image decoding standard, and the difference of the target block The image is decoded from the bit stream using the second method (normal method) for decoding the signal (S616).
  • the image decoding apparatus decodes the image from the bitstream using the second method (normal method) (S616).
  • the second flag and the third flag may be included in the same header or may be included in headers of different layers.
  • the corresponding first flag may be included in the same header as each of the second flag and the third flag.
  • sps_extension_flag and Dpcm_use_flag may be included in a sequence unit header (eg, SPS)
  • pps_extension_flag and LM_pred_use_flag may be included in a single picture header (eg, PPS).
  • each processing unit included in the image decoding apparatus or the image encoding apparatus according to the above embodiment is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
  • circuits are not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • An FPGA Field Programmable Gate Array
  • reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
  • each component may be configured by dedicated hardware or may be realized by executing a software program suitable for each component.
  • Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.
  • the image decoding apparatus and the image encoding apparatus include a processing circuit and a storage device (storage) electrically connected to the processing circuit (accessible from the processing circuit).
  • the processing circuit includes at least one of dedicated hardware and a program execution unit. Further, when the processing circuit includes a program execution unit, the storage device stores a software program executed by the program execution unit. The processing circuit executes the image decoding method or the image encoding method according to the above embodiment using the storage device.
  • the present invention may be the software program or a non-transitory computer-readable recording medium on which the program is recorded.
  • the program can be distributed via a transmission medium such as the Internet.
  • division of functional blocks in the block diagram is an example, and a plurality of functional blocks can be realized as one functional block, a single functional block can be divided into a plurality of functions, or some functions can be transferred to other functional blocks. May be.
  • functions of a plurality of functional blocks having similar functions may be processed in parallel or time-division by a single hardware or software.
  • the order in which the steps included in the image decoding method or the image encoding method are executed is for illustrating the present invention specifically, and may be in an order other than the above. . Also, some of the above steps may be executed simultaneously (in parallel) with other steps.
  • the storage medium may be any medium that can record a program, such as a magnetic disk, an optical disk, a magneto-optical disk, an IC card, and a semiconductor memory.
  • the system has an image encoding / decoding device including an image encoding device using an image encoding method and an image decoding device using an image decoding method.
  • image encoding / decoding device including an image encoding device using an image encoding method and an image decoding device using an image decoding method.
  • Other configurations in the system can be appropriately changed according to circumstances.
  • FIG. 13 is a diagram showing an overall configuration of a content supply system ex100 that realizes a content distribution service.
  • a communication service providing area is divided into desired sizes, and base stations ex106, ex107, ex108, ex109, and ex110, which are fixed wireless stations, are installed in each cell.
  • the content supply system ex100 includes a computer ex111, a PDA (Personal Digital Assistant) ex112, a camera ex113, a mobile phone ex114, a game machine ex115 via the Internet ex101, the Internet service provider ex102, the telephone network ex104, and the base stations ex106 to ex110. Etc. are connected.
  • PDA Personal Digital Assistant
  • each device may be directly connected to the telephone network ex104 without going from the base station ex106, which is a fixed wireless station, to ex110.
  • the devices may be directly connected to each other via short-range wireless or the like.
  • the camera ex113 is a device that can shoot moving images such as a digital video camera
  • the camera ex116 is a device that can shoot still images and movies such as a digital camera.
  • the mobile phone ex114 is GSM (registered trademark) (Global System for Mobile Communications), CDMA (Code Division Multiple Access), W-CDMA (Wideband-Code Division Multiple Access), or LTE (Long Term Evolution).
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • W-CDMA Wideband-Code Division Multiple Access
  • LTE Long Term Evolution
  • the system may be a mobile phone of HSPA (High Speed Packet Access) or PHS (Personal Handyphone System).
  • the camera ex113 and the like are connected to the streaming server ex103 through the base station ex109 and the telephone network ex104, thereby enabling live distribution and the like.
  • live distribution content that is shot by a user using the camera ex113 (for example, music live video) is encoded as described in each of the above embodiments (that is, in one aspect of the present invention).
  • the streaming server ex103 stream-distributes the content data transmitted to the requested client. Examples of the client include a computer ex111, a PDA ex112, a camera ex113, a mobile phone ex114, and a game machine ex115 that can decode the encoded data.
  • Each device that receives the distributed data decodes the received data and reproduces it (that is, functions as an image decoding device according to one embodiment of the present invention).
  • the captured data may be encoded by the camera ex113, the streaming server ex103 that performs data transmission processing, or may be shared with each other.
  • the decryption processing of the distributed data may be performed by the client, the streaming server ex103, or may be performed in common with each other.
  • still images and / or moving image data captured by the camera ex116 may be transmitted to the streaming server ex103 via the computer ex111.
  • the encoding process in this case may be performed by any of the camera ex116, the computer ex111, and the streaming server ex103, or may be performed in a shared manner.
  • these encoding / decoding processes are generally performed in the computer ex111 and the LSI ex500 included in each device.
  • the LSI ex500 may be configured as a single chip or a plurality of chips.
  • moving image encoding / decoding software is incorporated into some recording medium (CD-ROM, flexible disk, hard disk, etc.) that can be read by the computer ex111, etc., and encoding / decoding processing is performed using the software. May be.
  • moving image data acquired by the camera may be transmitted.
  • the moving image data at this time is data encoded by the LSI ex500 included in the mobile phone ex114.
  • the streaming server ex103 may be a plurality of servers or a plurality of computers, and may process, record, and distribute data in a distributed manner.
  • the encoded data can be received and reproduced by the client.
  • the information transmitted by the user can be received, decrypted and reproduced by the client in real time, and personal broadcasting can be realized even for a user who does not have special rights or facilities.
  • the digital broadcasting system ex200 also includes at least the moving image encoding device (image encoding device) or the moving image decoding according to each of the above embodiments. Any of the devices (image decoding devices) can be incorporated.
  • the broadcast station ex201 multiplexed data obtained by multiplexing music data and the like on video data is transmitted to a communication or satellite ex202 via radio waves.
  • This video data is data encoded by the moving image encoding method described in each of the above embodiments (that is, data encoded by the image encoding apparatus according to one aspect of the present invention).
  • the broadcasting satellite ex202 transmits a radio wave for broadcasting, and this radio wave is received by a home antenna ex204 capable of receiving satellite broadcasting.
  • the received multiplexed data is decoded and reproduced by an apparatus such as the television (receiver) ex300 or the set top box (STB) ex217 (that is, functions as an image decoding apparatus according to one embodiment of the present invention).
  • a reader / recorder ex218 that reads and decodes multiplexed data recorded on a recording medium ex215 such as a DVD or a BD, or encodes a video signal on the recording medium ex215 and, in some cases, multiplexes and writes it with a music signal. It is possible to mount the moving picture decoding apparatus or moving picture encoding apparatus described in the above embodiments. In this case, the reproduced video signal is displayed on the monitor ex219, and the video signal can be reproduced in another device or system using the recording medium ex215 on which the multiplexed data is recorded.
  • a moving picture decoding apparatus may be mounted in a set-top box ex217 connected to a cable ex203 for cable television or an antenna ex204 for satellite / terrestrial broadcasting and displayed on the monitor ex219 of the television.
  • the moving picture decoding apparatus may be incorporated in the television instead of the set top box.
  • FIG. 15 is a diagram illustrating a television (receiver) ex300 that uses the video decoding method and the video encoding method described in each of the above embodiments.
  • the television ex300 obtains or outputs multiplexed data in which audio data is multiplexed with video data via the antenna ex204 or the cable ex203 that receives the broadcast, and demodulates the received multiplexed data.
  • the modulation / demodulation unit ex302 that modulates multiplexed data to be transmitted to the outside, and the demodulated multiplexed data is separated into video data and audio data, or the video data and audio data encoded by the signal processing unit ex306 Is provided with a multiplexing / demultiplexing unit ex303.
  • the television ex300 also decodes the audio data and the video data, or encodes the information, the audio signal processing unit ex304, the video signal processing unit ex305 (the image encoding device or the image according to one embodiment of the present invention) A signal processing unit ex306 that functions as a decoding device), a speaker ex307 that outputs the decoded audio signal, and an output unit ex309 that includes a display unit ex308 such as a display that displays the decoded video signal. Furthermore, the television ex300 includes an interface unit ex317 including an operation input unit ex312 that receives an input of a user operation. Furthermore, the television ex300 includes a control unit ex310 that performs overall control of each unit, and a power supply circuit unit ex311 that supplies power to each unit.
  • the interface unit ex317 includes a bridge unit ex313 connected to an external device such as a reader / recorder ex218, a recording unit ex216 such as an SD card, and an external recording unit such as a hard disk.
  • a driver ex315 for connecting to a medium, a modem ex316 for connecting to a telephone network, and the like may be included.
  • the recording medium ex216 is capable of electrically recording information by using a nonvolatile / volatile semiconductor memory element to be stored.
  • Each part of the television ex300 is connected to each other via a synchronous bus.
  • the television ex300 receives a user operation from the remote controller ex220 or the like, and demultiplexes the multiplexed data demodulated by the modulation / demodulation unit ex302 by the multiplexing / demultiplexing unit ex303 based on the control of the control unit ex310 having a CPU or the like. Furthermore, in the television ex300, the separated audio data is decoded by the audio signal processing unit ex304, and the separated video data is decoded by the video signal processing unit ex305 using the decoding method described in each of the above embodiments.
  • the decoded audio signal and video signal are output from the output unit ex309 to the outside. At the time of output, these signals may be temporarily stored in the buffers ex318, ex319, etc. so that the audio signal and the video signal are reproduced in synchronization. Also, the television ex300 may read multiplexed data from recording media ex215 and ex216 such as a magnetic / optical disk and an SD card, not from broadcasting. Next, a configuration in which the television ex300 encodes an audio signal or a video signal and transmits the signal to the outside or to a recording medium will be described.
  • the television ex300 receives a user operation from the remote controller ex220 and the like, encodes an audio signal with the audio signal processing unit ex304, and converts the video signal with the video signal processing unit ex305 based on the control of the control unit ex310. Encoding is performed using the encoding method described in (1).
  • the encoded audio signal and video signal are multiplexed by the multiplexing / demultiplexing unit ex303 and output to the outside. When multiplexing, these signals may be temporarily stored in the buffers ex320, ex321, etc. so that the audio signal and the video signal are synchronized.
  • a plurality of buffers ex318, ex319, ex320, and ex321 may be provided as illustrated, or one or more buffers may be shared. Further, in addition to the illustrated example, data may be stored in the buffer as a buffer material that prevents system overflow and underflow, for example, between the modulation / demodulation unit ex302 and the multiplexing / demultiplexing unit ex303.
  • the television ex300 has a configuration for receiving AV input of a microphone and a camera, and performs encoding processing on the data acquired from them. Also good.
  • the television ex300 has been described as a configuration capable of the above-described encoding processing, multiplexing, and external output, but these processing cannot be performed, and only the above-described reception, decoding processing, and external output are possible. It may be a configuration.
  • the decoding process or the encoding process may be performed by either the television ex300 or the reader / recorder ex218,
  • the reader / recorder ex218 may share with each other.
  • FIG. 16 shows a configuration of the information reproducing / recording unit ex400 when data is read from or written to the optical disk.
  • the information reproducing / recording unit ex400 includes elements ex401, ex402, ex403, ex404, ex405, ex406, and ex407 described below.
  • the optical head ex401 irradiates a laser spot on the recording surface of the recording medium ex215 that is an optical disk to write information, and detects information reflected from the recording surface of the recording medium ex215 to read the information.
  • the modulation recording unit ex402 electrically drives a semiconductor laser built in the optical head ex401 and modulates the laser beam according to the recording data.
  • the reproduction demodulator ex403 amplifies the reproduction signal obtained by electrically detecting the reflected light from the recording surface by the photodetector built in the optical head ex401, separates and demodulates the signal component recorded on the recording medium ex215, and is necessary To play back information.
  • the buffer ex404 temporarily holds information to be recorded on the recording medium ex215 and information reproduced from the recording medium ex215.
  • the disk motor ex405 rotates the recording medium ex215.
  • the servo control unit ex406 moves the optical head ex401 to a predetermined information track while controlling the rotational drive of the disk motor ex405, and performs a laser spot tracking process.
  • the system control unit ex407 controls the entire information reproduction / recording unit ex400.
  • the system control unit ex407 uses various types of information held in the buffer ex404, and generates and adds new information as necessary.
  • the modulation recording unit ex402, the reproduction demodulation unit This is realized by recording / reproducing information through the optical head ex401 while operating the ex403 and the servo control unit ex406 in a coordinated manner.
  • the system control unit ex407 includes, for example, a microprocessor, and executes these processes by executing a read / write program.
  • the optical head ex401 has been described as irradiating a laser spot.
  • a configuration in which higher-density recording is performed using near-field light may be used.
  • FIG. 17 shows a schematic diagram of a recording medium ex215 that is an optical disk.
  • Guide grooves grooves
  • address information indicating the absolute position on the disc is recorded in advance on the information track ex230 by changing the shape of the groove.
  • This address information includes information for specifying the position of the recording block ex231 that is a unit for recording data, and the recording block is specified by reproducing the information track ex230 and reading the address information in a recording or reproducing apparatus.
  • the recording medium ex215 includes a data recording area ex233, an inner peripheral area ex232, and an outer peripheral area ex234.
  • the area used for recording user data is the data recording area ex233, and the inner circumference area ex232 and the outer circumference area ex234 arranged on the inner or outer circumference of the data recording area ex233 are used for specific purposes other than user data recording. Used.
  • the information reproducing / recording unit ex400 reads / writes encoded audio data, video data, or multiplexed data obtained by multiplexing these data with respect to the data recording area ex233 of the recording medium ex215.
  • an optical disk such as a single-layer DVD or BD has been described as an example.
  • the present invention is not limited to these, and an optical disk having a multilayer structure and capable of recording other than the surface may be used.
  • an optical disc with a multi-dimensional recording / reproducing structure such as recording information using light of different wavelengths in the same place on the disc, or recording different layers of information from various angles. It may be.
  • the car ex210 having the antenna ex205 can receive data from the satellite ex202 and the like, and the moving image can be reproduced on a display device such as the car navigation ex211 that the car ex210 has.
  • the configuration of the car navigation ex211 may be, for example, the configuration shown in FIG. 15 with a GPS receiving unit added, and the same may be considered for the computer ex111, the mobile phone ex114, and the like.
  • FIG. 18A is a diagram showing the mobile phone ex114 using the moving picture decoding method and the moving picture encoding method described in the above embodiment.
  • the mobile phone ex114 includes an antenna ex350 for transmitting and receiving radio waves to and from the base station ex110, a camera unit ex365 capable of capturing video and still images, a video captured by the camera unit ex365, a video received by the antenna ex350, and the like Is provided with a display unit ex358 such as a liquid crystal display for displaying the decrypted data.
  • the mobile phone ex114 further includes a main body unit having an operation key unit ex366, an audio output unit ex357 such as a speaker for outputting audio, an audio input unit ex356 such as a microphone for inputting audio, a captured video,
  • an audio input unit ex356 such as a microphone for inputting audio
  • a captured video In the memory unit ex367 for storing encoded data or decoded data such as still images, recorded audio, received video, still images, mails, or the like, or an interface unit with a recording medium for storing data
  • a slot ex364 is provided.
  • the mobile phone ex114 has a power supply circuit part ex361, an operation input control part ex362, and a video signal processing part ex355 with respect to a main control part ex360 that comprehensively controls each part of the main body including the display part ex358 and the operation key part ex366.
  • a camera interface unit ex363, an LCD (Liquid Crystal Display) control unit ex359, a modulation / demodulation unit ex352, a multiplexing / demultiplexing unit ex353, an audio signal processing unit ex354, a slot unit ex364, and a memory unit ex367 are connected to each other via a bus ex370. ing.
  • the power supply circuit unit ex361 starts up the mobile phone ex114 in an operable state by supplying power from the battery pack to each unit.
  • the cellular phone ex114 converts the audio signal collected by the audio input unit ex356 in the voice call mode into a digital audio signal by the audio signal processing unit ex354 based on the control of the main control unit ex360 having a CPU, a ROM, a RAM, and the like. Then, this is subjected to spectrum spread processing by the modulation / demodulation unit ex352, digital-analog conversion processing and frequency conversion processing are performed by the transmission / reception unit ex351, and then transmitted via the antenna ex350.
  • the mobile phone ex114 also amplifies the received data received via the antenna ex350 in the voice call mode, performs frequency conversion processing and analog-digital conversion processing, performs spectrum despreading processing by the modulation / demodulation unit ex352, and performs voice signal processing unit After being converted into an analog audio signal by ex354, this is output from the audio output unit ex357.
  • the text data of the e-mail input by operating the operation key unit ex366 of the main unit is sent to the main control unit ex360 via the operation input control unit ex362.
  • the main control unit ex360 performs spread spectrum processing on the text data in the modulation / demodulation unit ex352, performs digital analog conversion processing and frequency conversion processing in the transmission / reception unit ex351, and then transmits the text data to the base station ex110 via the antenna ex350.
  • almost the reverse process is performed on the received data and output to the display unit ex358.
  • the video signal processing unit ex355 compresses the video signal supplied from the camera unit ex365 by the moving image encoding method described in the above embodiments. Encode (that is, function as an image encoding device according to an aspect of the present invention), and send the encoded video data to the multiplexing / demultiplexing unit ex353.
  • the audio signal processing unit ex354 encodes the audio signal picked up by the audio input unit ex356 while the camera unit ex365 images a video, a still image, etc., and sends the encoded audio data to the multiplexing / separating unit ex353. To do.
  • the multiplexing / demultiplexing unit ex353 multiplexes the encoded video data supplied from the video signal processing unit ex355 and the encoded audio data supplied from the audio signal processing unit ex354 by a predetermined method, and is obtained as a result.
  • the multiplexed data is subjected to spread spectrum processing by the modulation / demodulation unit (modulation / demodulation circuit unit) ex352, digital-analog conversion processing and frequency conversion processing by the transmission / reception unit ex351, and then transmitted via the antenna ex350.
  • the multiplexing / separating unit ex353 separates the multiplexed data into a video data bit stream and an audio data bit stream, and performs video signal processing on the video data encoded via the synchronization bus ex370.
  • the encoded audio data is supplied to the audio signal processing unit ex354 while being supplied to the unit ex355.
  • the video signal processing unit ex355 decodes the video signal by decoding using the video decoding method corresponding to the video encoding method described in each of the above embodiments (that is, an image according to an aspect of the present invention).
  • video and still images included in the moving image file linked to the home page are displayed from the display unit ex358 via the LCD control unit ex359.
  • the audio signal processing unit ex354 decodes the audio signal, and the audio is output from the audio output unit ex357.
  • the terminal such as the mobile phone ex114 is referred to as a transmission terminal having only an encoder and a receiving terminal having only a decoder.
  • a transmission terminal having only an encoder
  • a receiving terminal having only a decoder.
  • multiplexed data in which music data or the like is multiplexed with video data is received and transmitted, but data in which character data or the like related to video is multiplexed in addition to audio data It may be video data itself instead of multiplexed data.
  • the moving picture encoding method or the moving picture decoding method shown in each of the above embodiments can be used in any of the above-described devices / systems. The described effect can be obtained.
  • Embodiment 4 The moving picture coding method or apparatus shown in the above embodiments and the moving picture coding method or apparatus compliant with different standards such as MPEG-2, MPEG4-AVC, and VC-1 are appropriately switched as necessary. Thus, it is also possible to generate video data.
  • multiplexed data obtained by multiplexing audio data or the like with video data is configured to include identification information indicating which standard the video data conforms to.
  • identification information indicating which standard the video data conforms to.
  • FIG. 19 is a diagram showing a structure of multiplexed data.
  • multiplexed data is obtained by multiplexing one or more of a video stream, an audio stream, a presentation graphics stream (PG), and an interactive graphics stream.
  • the video stream indicates the main video and sub-video of the movie
  • the audio stream (IG) indicates the main audio portion of the movie and the sub-audio mixed with the main audio
  • the presentation graphics stream indicates the subtitles of the movie.
  • the main video indicates a normal video displayed on the screen
  • the sub-video is a video displayed on a small screen in the main video.
  • the interactive graphics stream indicates an interactive screen created by arranging GUI components on the screen.
  • the video stream is encoded by the moving image encoding method or apparatus shown in the above embodiments, or the moving image encoding method or apparatus conforming to the conventional standards such as MPEG-2, MPEG4-AVC, and VC-1. ing.
  • the audio stream is encoded by a method such as Dolby AC-3, Dolby Digital Plus, MLP, DTS, DTS-HD, or linear PCM.
  • Each stream included in the multiplexed data is identified by PID. For example, 0x1011 for video streams used for movie images, 0x1100 to 0x111F for audio streams, 0x1200 to 0x121F for presentation graphics, 0x1400 to 0x141F for interactive graphics streams, 0x1B00 to 0x1B1F are assigned to video streams used for sub-pictures, and 0x1A00 to 0x1A1F are assigned to audio streams used for sub-audio mixed with the main audio.
  • FIG. 20 is a diagram schematically showing how multiplexed data is multiplexed.
  • a video stream ex235 composed of a plurality of video frames and an audio stream ex238 composed of a plurality of audio frames are converted into PES packet sequences ex236 and ex239, respectively, and converted into TS packets ex237 and ex240.
  • the data of the presentation graphics stream ex241 and interactive graphics ex244 are converted into PES packet sequences ex242 and ex245, respectively, and further converted into TS packets ex243 and ex246.
  • the multiplexed data ex247 is configured by multiplexing these TS packets into one stream.
  • FIG. 21 shows in more detail how the video stream is stored in the PES packet sequence.
  • the first row in FIG. 21 shows a video frame sequence of the video stream.
  • the second level shows a PES packet sequence.
  • a plurality of Video Presentation Units in the video stream are divided into pictures, B pictures, and P pictures and stored in the payload of the PES packet.
  • Each PES packet has a PES header, and a PTS (Presentation Time-Stamp) that is a display time of a picture and a DTS (Decoding Time-Stamp) that is a decoding time of a picture are stored in the PES header.
  • PTS Presentation Time-Stamp
  • DTS Decoding Time-Stamp
  • FIG. 22 shows the format of TS packets that are finally written in the multiplexed data.
  • the TS packet is a 188-byte fixed-length packet composed of a 4-byte TS header having information such as a PID for identifying a stream and a 184-byte TS payload for storing data.
  • the PES packet is divided and stored in the TS payload.
  • a 4-byte TP_Extra_Header is added to a TS packet, forms a 192-byte source packet, and is written in multiplexed data.
  • TP_Extra_Header information such as ATS (Arrival_Time_Stamp) is described.
  • ATS indicates the transfer start time of the TS packet to the PID filter of the decoder.
  • Source packets are arranged in the multiplexed data as shown in the lower part of FIG. 22, and the number incremented from the head of the multiplexed data is called SPN (source packet number).
  • TS packets included in the multiplexed data include PAT (Program Association Table), PMT (Program Map Table), PCR (Program Clock Reference), and the like in addition to each stream such as video / audio / caption.
  • PAT indicates what the PID of the PMT used in the multiplexed data is, and the PID of the PAT itself is registered as 0.
  • the PMT has the PID of each stream such as video / audio / subtitles included in the multiplexed data and the attribute information of the stream corresponding to each PID, and has various descriptors related to the multiplexed data.
  • the descriptor includes copy control information for instructing permission / non-permission of copying of multiplexed data.
  • the PCR corresponds to the ATS in which the PCR packet is transferred to the decoder. Contains STC time information.
  • FIG. 23 is a diagram for explaining the data structure of the PMT in detail.
  • a PMT header describing the length of data included in the PMT is arranged at the head of the PMT.
  • a plurality of descriptors related to multiplexed data are arranged.
  • the copy control information and the like are described as descriptors.
  • a plurality of pieces of stream information regarding each stream included in the multiplexed data are arranged.
  • the stream information includes a stream descriptor in which a stream type, a stream PID, and stream attribute information (frame rate, aspect ratio, etc.) are described to identify a compression codec of the stream.
  • the multiplexed data is recorded together with the multiplexed data information file.
  • the multiplexed data information file is management information of multiplexed data, has a one-to-one correspondence with the multiplexed data, and includes multiplexed data information, stream attribute information, and an entry map.
  • the multiplexed data information is composed of a system rate, a reproduction start time, and a reproduction end time.
  • the system rate indicates a maximum transfer rate of multiplexed data to a PID filter of a system target decoder described later.
  • the ATS interval included in the multiplexed data is set to be equal to or less than the system rate.
  • the playback start time is the PTS of the first video frame of the multiplexed data
  • the playback end time is set by adding the playback interval for one frame to the PTS of the video frame at the end of the multiplexed data.
  • attribute information about each stream included in the multiplexed data is registered for each PID.
  • the attribute information has different information for each video stream, audio stream, presentation graphics stream, and interactive graphics stream.
  • the video stream attribute information includes the compression codec used to compress the video stream, the resolution of the individual picture data constituting the video stream, the aspect ratio, and the frame rate. It has information such as how much it is.
  • the audio stream attribute information includes the compression codec used to compress the audio stream, the number of channels included in the audio stream, the language supported, and the sampling frequency. With information. These pieces of information are used for initialization of the decoder before the player reproduces it.
  • the stream type included in the PMT is used.
  • video stream attribute information included in the multiplexed data information is used.
  • the video encoding shown in each of the above embodiments for the stream type or video stream attribute information included in the PMT.
  • FIG. 26 shows steps of the moving picture decoding method according to the present embodiment.
  • step exS100 the stream type included in the PMT or the video stream attribute information included in the multiplexed data information is acquired from the multiplexed data.
  • step exS101 it is determined whether or not the stream type or the video stream attribute information indicates multiplexed data generated by the moving picture encoding method or apparatus described in the above embodiments. To do.
  • step exS102 the above embodiments are performed. Decoding is performed by the moving picture decoding method shown in the form.
  • the conventional information Decoding is performed by a moving image decoding method compliant with the standard.
  • FIG. 27 shows a configuration of an LSI ex500 that is made into one chip.
  • the LSI ex500 includes elements ex501, ex502, ex503, ex504, ex505, ex506, ex507, ex508, and ex509 described below, and each element is connected via a bus ex510.
  • the power supply circuit unit ex505 is activated to an operable state by supplying power to each unit when the power supply is on.
  • the LSI ex500 when performing the encoding process, performs the microphone ex117 and the camera ex113 by the AV I / O ex509 based on the control of the control unit ex501 including the CPU ex502, the memory controller ex503, the stream controller ex504, the drive frequency control unit ex512, and the like.
  • the AV signal is input from the above.
  • the input AV signal is temporarily stored in an external memory ex511 such as SDRAM.
  • the accumulated data is divided into a plurality of times as appropriate according to the processing amount and the processing speed and sent to the signal processing unit ex507, and the signal processing unit ex507 encodes an audio signal and / or video. Signal encoding is performed.
  • the encoding process of the video signal is the encoding process described in the above embodiments.
  • the signal processing unit ex507 further performs processing such as multiplexing the encoded audio data and the encoded video data according to circumstances, and outputs the result from the stream I / Oex 506 to the outside.
  • the output multiplexed data is transmitted to the base station ex107 or written to the recording medium ex215. It should be noted that data should be temporarily stored in the buffer ex508 so as to be synchronized when multiplexing.
  • the memory ex511 is described as an external configuration of the LSI ex500.
  • a configuration included in the LSI ex500 may be used.
  • the number of buffers ex508 is not limited to one, and a plurality of buffers may be provided.
  • the LSI ex500 may be made into one chip or a plurality of chips.
  • control unit ex501 includes the CPU ex502, the memory controller ex503, the stream controller ex504, the drive frequency control unit ex512, and the like, but the configuration of the control unit ex501 is not limited to this configuration.
  • the signal processing unit ex507 may further include a CPU.
  • the CPU ex502 may be configured to include a signal processing unit ex507 or, for example, an audio signal processing unit that is a part of the signal processing unit ex507.
  • the control unit ex501 is configured to include a signal processing unit ex507 or a CPU ex502 having a part thereof.
  • LSI LSI
  • IC system LSI
  • super LSI ultra LSI depending on the degree of integration
  • the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
  • An FPGA Field Programmable Gate Array
  • Such a programmable logic device typically loads or reads a program constituting software or firmware from a memory or the like, so that the moving image encoding method or the moving image described in each of the above embodiments is used.
  • An image decoding method can be performed.
  • FIG. 28 shows a configuration ex800 in the present embodiment.
  • the drive frequency switching unit ex803 sets the drive frequency high when the video data is generated by the moving image encoding method or apparatus described in the above embodiments.
  • the decoding processing unit ex801 that executes the moving picture decoding method described in each of the above embodiments is instructed to decode the video data.
  • the video data is video data compliant with the conventional standard, compared to the case where the video data is generated by the moving picture encoding method or apparatus shown in the above embodiments, Set the drive frequency low. Then, it instructs the decoding processing unit ex802 compliant with the conventional standard to decode the video data.
  • the drive frequency switching unit ex803 includes the CPU ex502 and the drive frequency control unit ex512 of FIG.
  • the decoding processing unit ex801 that executes the moving picture decoding method shown in each of the above embodiments and the decoding processing unit ex802 that complies with the conventional standard correspond to the signal processing unit ex507 in FIG.
  • the CPU ex502 identifies which standard the video data conforms to. Then, based on the signal from the CPU ex502, the drive frequency control unit ex512 sets the drive frequency. Further, based on the signal from the CPU ex502, the signal processing unit ex507 decodes the video data.
  • the identification information described in the fourth embodiment may be used.
  • the identification information is not limited to that described in the fourth embodiment, and any information that can identify which standard the video data conforms to may be used. For example, it is possible to identify which standard the video data conforms to based on an external signal that identifies whether the video data is used for a television or a disk. In some cases, identification may be performed based on such an external signal.
  • the selection of the drive frequency in the CPU ex502 may be performed based on, for example, a lookup table in which video data standards and drive frequencies are associated with each other as shown in FIG. The look-up table is stored in the buffer ex508 or the internal memory of the LSI, and the CPU ex502 can select the drive frequency by referring to the look-up table.
  • FIG. 29 shows steps for executing the method of the present embodiment.
  • the signal processing unit ex507 acquires identification information from the multiplexed data.
  • the CPU ex502 identifies whether the video data is generated by the encoding method or apparatus described in each of the above embodiments based on the identification information.
  • the CPU ex502 sends a signal for setting the drive frequency high to the drive frequency control unit ex512. Then, the drive frequency control unit ex512 sets a high drive frequency.
  • step exS203 the CPU ex502 drives the signal for setting the drive frequency low. This is sent to the frequency control unit ex512. Then, in the drive frequency control unit ex512, the drive frequency is set to be lower than that in the case where the video data is generated by the encoding method or apparatus described in the above embodiments.
  • the power saving effect can be further enhanced by changing the voltage applied to the LSI ex500 or the device including the LSI ex500 in conjunction with the switching of the driving frequency. For example, when the drive frequency is set low, it is conceivable that the voltage applied to the LSI ex500 or the device including the LSI ex500 is set low as compared with the case where the drive frequency is set high.
  • the setting method of the driving frequency may be set to a high driving frequency when the processing amount at the time of decoding is large, and to a low driving frequency when the processing amount at the time of decoding is small. It is not limited to the method.
  • the amount of processing for decoding video data compliant with the MPEG4-AVC standard is larger than the amount of processing for decoding video data generated by the moving picture encoding method or apparatus described in the above embodiments. It is conceivable that the setting of the driving frequency is reversed to that in the case described above.
  • the method for setting the drive frequency is not limited to the configuration in which the drive frequency is lowered.
  • the voltage applied to the LSIex500 or the apparatus including the LSIex500 is set high.
  • the driving of the CPU ex502 is stopped.
  • the CPU ex502 is temporarily stopped because there is room in processing. Is also possible. Even when the identification information indicates that the video data is generated by the moving image encoding method or apparatus described in each of the above embodiments, if there is a margin for processing, the CPU ex502 is temporarily driven. It can also be stopped. In this case, it is conceivable to set the stop time shorter than in the case where the video data conforms to the conventional standards such as MPEG-2, MPEG4-AVC, and VC-1.
  • a plurality of video data that conforms to different standards may be input to the above-described devices and systems such as a television and a mobile phone.
  • the signal processing unit ex507 of the LSI ex500 needs to support a plurality of standards in order to be able to decode even when a plurality of video data complying with different standards is input.
  • the signal processing unit ex507 corresponding to each standard is used individually, there is a problem that the circuit scale of the LSI ex500 increases and the cost increases.
  • a decoding processing unit for executing the moving picture decoding method shown in each of the above embodiments and a decoding conforming to a standard such as MPEG-2, MPEG4-AVC, or VC-1
  • the processing unit is partly shared.
  • An example of this configuration is shown as ex900 in FIG. 31A.
  • the moving picture decoding method shown in each of the above embodiments and the moving picture decoding method compliant with the MPEG4-AVC standard are processed in processes such as entropy coding, inverse quantization, deblocking filter, and motion compensation. Some contents are common.
  • the decoding processing unit ex902 corresponding to the MPEG4-AVC standard is shared, and for other processing contents specific to one aspect of the present invention that do not correspond to the MPEG4-AVC standard, a dedicated decoding processing unit A configuration using ex901 is conceivable.
  • a dedicated decoding processing unit ex901 is used for switching processing methods, and other entropy decoding, inverse quantization, It is conceivable to share a decoding processing unit for any of the deblocking filter, motion compensation, or all processes.
  • the decoding processing unit for executing the moving picture decoding method described in each of the above embodiments is shared, and the processing content specific to the MPEG4-AVC standard As for, a configuration using a dedicated decoding processing unit may be used.
  • ex1000 in FIG. 31B shows another example in which processing is partially shared.
  • a dedicated decoding processing unit ex1001 corresponding to the processing content specific to one aspect of the present invention
  • a dedicated decoding processing unit ex1002 corresponding to the processing content specific to another conventional standard
  • a common decoding processing unit ex1003 corresponding to the processing contents common to the moving image decoding method according to the above and other conventional moving image decoding methods.
  • the dedicated decoding processing units ex1001 and ex1002 are not necessarily specialized in one aspect of the present invention or processing content specific to other conventional standards, and can execute other general-purpose processing. Also good.
  • the configuration of the present embodiment can be implemented by LSI ex500.
  • the processing content common to the moving picture decoding method according to one aspect of the present invention and the moving picture decoding method of the conventional standard reduces the circuit scale of the LSI by sharing the decoding processing unit, In addition, the cost can be reduced.
  • the present invention can be used for various purposes such as storage, transmission, and communication.
  • the present invention can be used for high-resolution information display devices or imaging devices such as televisions, digital video recorders, car navigation systems, mobile phones, digital cameras, and digital video cameras.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

La présente invention porte sur un procédé de codage d'image qui comprend: une étape de codage de premier drapeau (S501) consistant à coder un premier drapeau qui indique si une norme d'extension prescrite d'une norme de codage d'image prescrite est utilisée; une étape de codage de second drapeau (S503) consistant, si le premier drapeau indique que la norme d'extension est utilisée (Oui en S502), à coder un second drapeau qui indique si un premier format est utilisé qui est un format de codage inclus dans la norme d'extension et qui code la différence d'échantillons qui sont adjacents et inclus dans un signal de différence de blocs sujets; et une étape de codage d'image (S505) qui code l'image à l'aide du premier format si le second drapeau indique que le premier format est utilisé (Oui en S504).
PCT/JP2014/003533 2013-07-08 2014-07-02 Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image WO2015004884A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/950,738 US10230973B2 (en) 2013-07-08 2015-11-24 Image coding method for coding information indicating coding scheme
US16/253,672 US10623760B2 (en) 2013-07-08 2019-01-22 Image coding method for coding information indicating coding scheme

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201361843480P 2013-07-08 2013-07-08
US61/843,480 2013-07-08
JP2014116966A JP6587046B2 (ja) 2013-07-08 2014-06-05 画像符号化方法、画像復号方法、画像符号化装置及び画像復号装置
JP2014-116966 2014-06-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/950,738 Continuation US10230973B2 (en) 2013-07-08 2015-11-24 Image coding method for coding information indicating coding scheme

Publications (1)

Publication Number Publication Date
WO2015004884A1 true WO2015004884A1 (fr) 2015-01-15

Family

ID=52279590

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/003533 WO2015004884A1 (fr) 2013-07-08 2014-07-02 Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image

Country Status (1)

Country Link
WO (1) WO2015004884A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021523586A (ja) * 2018-03-25 2021-09-02 ビー１、インスティテュート、オブ、イメージ、テクノロジー、インコーポレイテッドＢ１ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｉｍａｇｅ Ｔｅｃｈｎｏｌｏｇｙ， Ｉｎｃ． 映像符号化／復号化方法及び装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
KI-HUN HAN ET AL.: "Lossless Inter Coding for Advanced 4:4:4 Coding in H.264/MPEG-4 AVC", JOINT VIDEO TEAM (JVT) OF ISO/IEC MPEG & ITU-T VCEG (ISO/IEC JTC1/SC29/WG11 AND ITU-T SG 16 Q.6) 18TH MEETING, 16 January 2006 (2006-01-16) - 20 January 2006 (2006-01-20), BANGKOK, THAILAND *
MATTEO NACCARI ET AL.: "Inter- Prediction Residual DPCM", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 13TH MEETING, 18 April 2013 (2013-04-18) - 26 April 2013 (2013-04-26), INCHEON, KR *
MATTEO NACCARI ET AL.: "On support for alpha channel in HEVC", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 13TH MEETING, 18 April 2013 (2013-04-18) - 26 April 2013 (2013-04-26), INCHEON, KR *
THOMAS WIEGANA ET AL.: "WD3: Working Draft 3 of High-Efficiency Video Coding", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP3 AND ISO/IEC JTC1/SC29/WG11 5TH MEETING, 27 June 2011 (2011-06-27), GENEVA, CH *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021523586A (ja) * 2018-03-25 2021-09-02 ビー１、インスティテュート、オブ、イメージ、テクノロジー、インコーポレイテッドＢ１ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｉｍａｇｅ Ｔｅｃｈｎｏｌｏｇｙ， Ｉｎｃ． 映像符号化／復号化方法及び装置
US11956425B2 (en) 2018-03-25 2024-04-09 B1 Institute Of Image Technology, Inc. Image encoding/decoding method and device

Similar Documents

Publication Publication Date Title
JP6222589B2 (ja) 復号方法及び復号装置
JP6210248B2 (ja) 動画像符号化方法及び動画像符号化装置
JP6504478B2 (ja) 符号化復号方法
WO2013021619A1 (fr) Procédé et appareil de codage d'image, procédé et appareil de décodage d'image, et appareil de codage/décodage d'image
JP2016059074A (ja) 画像符号化復号化装置
JP6587046B2 (ja) 画像符号化方法、画像復号方法、画像符号化装置及び画像復号装置
JP6004375B2 (ja) 画像符号化方法および画像復号化方法
JP2013526199A (ja) 予測誤差から導出されるブロック形状を用いた予測符号化
JP2014512705A (ja) 画像符号化方法、画像復号方法、画像符号化装置、及び、画像復号装置
JP6483028B2 (ja) 画像符号化方法及び画像符号化装置
JP6399433B2 (ja) 画像符号化方法、画像復号方法、画像符号化装置及び画像復号装置
WO2013164903A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image, dispositif de décodage d'image et dispositif de codage et de décodage d'image
WO2012098878A1 (fr) Procédé de codage vidéo et procédé de décodage vidéo
JP6365924B2 (ja) 画像復号方法及び画像復号装置
WO2015001762A1 (fr) Procédés de codage et de décodage d'image, dispositifs de codage et de décodage d'image, et dispositif de codage/décodage d'image
WO2011132400A1 (fr) Procédé de codage d'image, et procédé de décodage d'image
WO2015059880A1 (fr) Procede de compensation de mouvement, procede de codage d'image, procede de decodage d'image, dispositif de codage d'image et dispositif de decodage d'image
WO2013014884A1 (fr) Procédé de codage d'image animée, dispositif de codage d'image animée, procédé de décodage d'image animée et dispositif de décodage d'image animée
JP2015082839A (ja) 動き補償方法、画像符号化方法、画像復号方法、画像符号化装置及び画像復号装置
WO2015004884A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image
WO2015098020A1 (fr) Procédé de codage d'image, procédé de décodage d'image, appareil de codage d'image et appareil de décodage d'image
WO2012042810A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image, dispositif de décodage d'image et système de traitement d'image
WO2012096157A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image
WO2013046616A1 (fr) Appareil de codage d'image, appareil de décodage d'image, procédé de codage d'image et procédé de décodage d'image
WO2012095930A1 (fr) Procédé de codage d'image, procédé de décodage d'image, dispositif de codage d'image et dispositif de décodage d'image

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14823143

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14823143

Country of ref document: EP

Kind code of ref document: A1