WO2017063168A1 - Procédé et appareil de codage d'image et dispositif de traitement d'image - Google Patents

Procédé et appareil de codage d'image et dispositif de traitement d'image Download PDF

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Publication number
WO2017063168A1
WO2017063168A1 PCT/CN2015/091989 CN2015091989W WO2017063168A1 WO 2017063168 A1 WO2017063168 A1 WO 2017063168A1 CN 2015091989 W CN2015091989 W CN 2015091989W WO 2017063168 A1 WO2017063168 A1 WO 2017063168A1
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WIPO (PCT)
Prior art keywords
color component
number information
image
bit
encoding
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Application number
PCT/CN2015/091989
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English (en)
Chinese (zh)
Inventor
叶姜莉
朱建清
王争
数井君彦
Original Assignee
富士通株式会社
叶姜莉
朱建清
王争
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Application filed by 富士通株式会社, 叶姜莉, 朱建清, 王争 filed Critical 富士通株式会社
Priority to CN201580080762.XA priority Critical patent/CN107710760A/zh
Priority to PCT/CN2015/091989 priority patent/WO2017063168A1/fr
Publication of WO2017063168A1 publication Critical patent/WO2017063168A1/fr

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    • 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
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • H04N19/463—Embedding additional information in the video signal during the compression process by compressing encoding parameters before transmission

Definitions

  • the present invention relates to the field of graphic image technology, and in particular, to an image encoding method, apparatus, and image processing apparatus.
  • one stream or multiple streams can be image-encoded, and each stream can have a sequence parameter set (SPS).
  • SPS Sequence Parameter Set
  • SPS can be placed in the header area of the stream.
  • Each stream may correspond to one or more image frames, each image frame having a Picture Parameter Set (PPS), for example, the PPS may be placed in the header file area of the image frame.
  • PPS Picture Parameter Set
  • Image coding can use a Palette Predictor.
  • the number information of the color component when the palette is predicted ie, how many color components are there, for example, only the luminance component when the color is monochromatic, the color component has only one; when the plurality of colors can include the luminance component and the chrominance component, the color
  • the components are, for example, three) can be defined in the chroma_format_idc of the SPS, and the bit number information used by the color component (which can be called bit-depth, for example, each bit of the color component is represented by several bits) can be defined in the seq_parameter_set_rbsp() of the SPS. .
  • the number information of the color component may also be defined in pps_scc_extension() of the PPS, for example, defined as monochrome_palette_flag; and the bit number information used by the color component may also be defined in the pps_scc_extension() of the PPS, for example, defined as luma_bit_depth_entry_minus8 And chroma_bit_depth_entry_minus8.
  • both the SPS and the PPS contain the number information of the color components and the bit number information used for the color components, that is, the color components, due to the consistency requirement of the bit stream.
  • the number information and the number of bits used by the color components appear redundant during encoding and decoding.
  • Embodiments of the present invention provide an image encoding method, apparatus, and image processing apparatus.
  • the purpose is to reduce the number of pieces of color components and the redundancy of the bit number information used by the color components, thereby reducing the bit cost of encoding and optimizing the syntax structure of HEVC.
  • an image encoding method including:
  • the bit number information used by the color component is not encoded to the picture parameter set corresponding to the image frame when encoding the parameters of the image frame.
  • an image encoding apparatus including:
  • An information determining unit that determines the number information of the color component and the bit number information used by the color component
  • a coding unit that does not encode the bit number information used by the color component to a picture parameter set corresponding to the image frame when encoding the parameters of the image frame.
  • an image processing apparatus including:
  • An image encoder that determines number information of a color component and bit number information used by the color component; and does not encode bit number information used by the color component to the image frame when encoding parameters of the image frame Corresponding picture parameter set; and/or
  • an image decoder that determines bit number information used by the color component according to a sequence parameter set corresponding to the stream in which the image frame is located, and decodes the image frame.
  • a computer readable program wherein when the program is executed in an image processing apparatus, the program causes a computer to perform image encoding as described above in the image processing apparatus Method and/or corresponding image decoding method.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an image encoding method as described above and/or a corresponding one in an image processing device Image decoding method.
  • An advantageous effect of the embodiment of the present invention is that the bit number information used by the color component is not encoded into the PPS corresponding to the image frame when encoding the image frame. This not only reduces redundant information, further reduces the bit cost of encoding, but also optimizes the syntax structure of HEVC.
  • FIG. 1 is a schematic diagram of an image encoding method according to Embodiment 1 of the present invention.
  • FIG. 2 is another schematic diagram of an image encoding method according to Embodiment 1 of the present invention.
  • FIG. 3 is another schematic diagram of an image encoding method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of an image coding apparatus according to Embodiment 2 of the present invention.
  • Figure 5 is a block diagram showing the structure of an image encoder according to a second embodiment of the present invention.
  • Figure 6 is a diagram showing an image processing apparatus according to a third embodiment of the present invention.
  • the palette initialization portion in the SPS of Screen Content Coding defines the number information of the color component and the bit number information used by the color component.
  • Table 1 shows a part of the syntax of the SPS.
  • the number information of the color component initialized by the palette prediction can be obtained from the chroma_format_idc in the SPS. Further, the bit number information used for the color component is obtained by adding a bit syntax element obtained by decoding in the SPS by 8, such as the syntax elements bit_depth_luma_minus8 and bit_depth_chroma_minus8 in Table 2 below.
  • Table 2 shows another part of the syntax of the SPS.
  • the palette initialization portion of the PPS of the SCC also defines the number information of the color components and the number of bits used for the color components.
  • Table 3 shows a part of the syntax of the PPS.
  • the number information of the color component initialized by the palette prediction can be obtained from the monochrome_palette_flag in the PPS. Further, the bit number information used for the color component can be obtained from luma_bit_depth_entry_minus8 and chroma_bit_depth_entry_minus8 in the PPS.
  • the chroma_format_idc in the SPS should be 0; when the monochrome_palette_flag in the PPS is equal to 0, the chroma_format_idc in the SPS should be a value greater than 0 (for example, 1, 2) Or 3).
  • the number information of the color component and the bit number information used for the color component are encoded not only in the SPS portion but also in the PPS portion.
  • monochrome_palette_flag, luma_bit_depth_entry_minus8, chroma_bit_depth_entry_minus8 in the PPS can be obtained from related information in the SPS.
  • the current coding method not only leads to redundant information, but also the grammatical structure is not clear enough.
  • FIG. 1 is a schematic diagram of an image encoding method according to an embodiment of the present invention. As shown in FIG. 1, the image encoding method includes:
  • Step 101 determining number information of a color component and bit number information used by the color component
  • Step 102 When encoding the parameters of the image frame, the bit number information used by the color component is not encoded into the PPS corresponding to the image frame.
  • the video image may be encoded into one or more streams, each stream having an SPS and may contain one or more image frames; each image frame having a PPS.
  • the number information of the color component and the bit number information used for the color component may be predetermined before encoding the image frame, and any existing method may be employed.
  • the SPS of the stream corresponding to the image frame may have been encoded; in this case, the bit number information used by the color component may not be encoded into the PPS corresponding to the image frame. In the middle, according to SPS can get this information.
  • FIG. 2 is another schematic diagram of an image encoding method according to an embodiment of the present invention, showing an embodiment of the present invention. As shown in FIG. 2, the image encoding method includes:
  • Step 201 Determine the number information of the color component and the bit number information used by the color component when encoding the parameter of the stream;
  • bit_depth_luma_minus8 and bit_depth_chroma_minus8 in the chroma_format_idc and seq_parameter_set_rbsp() of the SPS may be determined; specifically, as described in the existing standard.
  • Step 202 Encode the number information of the color component and the number of bits used by the color component into the SPS corresponding to the stream when encoding the parameter of the stream;
  • bit_depth_luma_minus8 and the bit_depth_chroma_minus8 in the chroma_format_idc and seq_parameter_set_rbsp() of the SPS may be bit-stream encoded; as described in the existing standard.
  • Step 203 Determine, when encoding the parameters of the image frame, the number information of the color component and the bit number information used by the color component;
  • the monochrome_palette_flag, luma_bit_depth_entry_minus8, chroma_bit_depth_entry_minus8 of the PPS may be determined; specifically, as described in the existing standard.
  • Step 204 When encoding the parameters of the image frame, encode the number information of the color component to the PPS corresponding to the image frame, and not encode the bit number information used by the color component to the PPS corresponding to the image frame.
  • the encoding of the SPS parameters may remain unchanged, and the encoding of the PPS parameters may delete the bit number information used by the color components.
  • Table 4 schematically shows a part of the syntax of the PPS of the present embodiment. For example, the bit-depth related information is deleted in the PPS.
  • SPS corresponds to N PPS. If the existing standard is adopted, it is assumed that SPS requires SPS_org bits in encoding, and N PPS requires PPS_org1, PPS_org2, ... PPS_orgN bits respectively; the bit-depth of luminance component and chrominance component is 8bit.
  • SPS and PPS require the following number of bits to encode:
  • Total_org SPS_org+PPS_org1+PPS_org2+...+PPS_orgN.
  • SPS and PPS require the following number of bits to encode:
  • the embodiment of the present invention can not only reduce redundant information, further reduce the bit cost of encoding, but also optimize the syntax structure of HEVC.
  • FIG. 2 only schematically shows the case of the present embodiment, but the present invention is not limited thereto.
  • step 201 and step 203 may be combined, or step 203 may be omitted.
  • the order of execution of each step may be changed according to actual conditions, or other steps may be added, or one or more of the steps may be omitted or merged.
  • the number information of the color components may not be encoded into the PPS corresponding to the image frame in step 203; that is, the monochrome_palette_flag in Table 4 may also be deleted.
  • FIG. 3 is another schematic diagram of an image encoding method according to an embodiment of the present invention, showing another embodiment of the present invention. As shown in FIG. 3, the image encoding method includes:
  • Step 301 Determine the number information of the color component and the bit number information used by the color component when encoding the parameter of the stream;
  • bit_depth_luma_minus8 and bit_depth_chroma_minus8 in the chroma_format_idc and seq_parameter_set_rbsp() of the SPS may be determined; specifically, as described in the existing standard.
  • Step 302 when encoding the parameter of the stream, encoding the number information of the color component and the number of bits used by the color component into the SPS corresponding to the stream;
  • bit_depth_luma_minus8 and the bit_depth_chroma_minus8 in the chroma_format_idc and seq_parameter_set_rbsp() of the SPS may be bit-stream encoded; specifically, as described in the existing standard.
  • monochrome_palette_flag, luma_bit_depth_entry_minus8, chroma_bit_depth_entry_minus8 can also be encoded into the SPS.
  • Table 5 schematically shows a part of the syntax of the SPS of the present embodiment. For example, the number information of the color component and the information about the bit-depth are added to the SPS.
  • Step 303 When encoding the parameters of the image frame, the number information of the color component is not encoded into the PPS corresponding to the image frame, and the bit number information used by the color component is not encoded into the PPS corresponding to the image frame.
  • Table 6 schematically shows a part of the syntax of the PPS of the present embodiment. For example, the number information of the color component and the related information of the bit-depth are deleted in the PPS.
  • SPS corresponds to N PPS. If the existing standard is adopted, it is assumed that SPS requires SPS_org bits in encoding, and N PPS requires PPS_org1, PPS_org2, ... PPS_orgN bits respectively; the bit-depth of luminance component and chrominance component is 8bit.
  • SPS and PPS require the following number of bits to encode:
  • Total_org SPS_org+PPS_org1+PPS_org2+...+PPS_orgN.
  • SPS and PPS require the following number of bits to encode:
  • the embodiment of the present invention can not only reduce redundant information, further reduce the bit cost of encoding, but also optimize the syntax structure of HEVC.
  • FIG. 3 only schematically shows the case of the present embodiment, but the present invention is not limited thereto.
  • the order of execution of each step may be changed according to actual conditions, or other steps may be added, or one or more of the steps may be omitted or merged.
  • the bit number information used by the color component may not be encoded into the PPS corresponding to the image frame when encoding the image frame; further, the number information of the color component may not be encoded into the image frame. Corresponding to the PPS. This not only reduces redundant information, further reduces the bit cost of encoding, but also optimizes the syntax structure of HEVC.
  • An embodiment of the present invention provides an image encoding apparatus, which corresponds to the image encoding method in Embodiment 1, and the same content is not described herein again.
  • the image encoding apparatus 400 includes:
  • the information determining unit 401 determines the number information of the color component and the bit number information used by the color component;
  • the encoding unit 402 does not encode the bit number information used by the color component to the PPS corresponding to the image frame when encoding the parameters of the image frame.
  • FIG. 4 only schematically shows a part of the image encoding apparatus related to the embodiment of the present invention. Unit, but the invention is not limited thereto.
  • a unit for determining a color palette, etc. for example, a unit for determining a color palette, etc.
  • the encoding unit 402 is further configured to: not encode the number information of the color component to the PPS corresponding to the image frame.
  • the encoding unit 402 is further configured to: when the parameter of the stream in which the image frame is located, encode the number information of the color component and the bit number information used by the color component to the stream Corresponding SPS.
  • the encoding unit 402 is further configured to: encode the number information of the color component to the PPS corresponding to the image frame.
  • the number information of the color component may be represented as monochrome_palette_flag
  • the bit number information used by the color component may be expressed as luma_bit_depth_entry_minus8; in the case where the color component includes a luminance component and a chrominance component, the bit number information used by the color component may be expressed as luma_bit_depth_entry_minus8 and Chroma_bit_depth_entry_minus8.
  • An embodiment of the present invention also provides an image encoder comprising the image encoding device 400 as described above.
  • FIG. 5 is a schematic diagram showing the structure of an image encoder according to an embodiment of the present invention.
  • image encoder 500 can include a central processing unit (CPU) 100 and memory 110; memory 110 is coupled to central processor 100.
  • the memory 110 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 100.
  • the functionality of image encoding device 400 may be integrated into central processor 100.
  • the central processing unit 100 can be configured to implement the image encoding method as described in Embodiment 1.
  • the image encoding device 400 can be configured separately from the central processing unit.
  • the image encoding device 400 can be configured as a chip connected to the central processing unit 100, and the image encoding device 400 can be implemented by control of the central processing unit.
  • the image encoder 500 may further include: an input and output unit 120, a display unit 130, and the like; wherein the functions of the above components are similar to those of the prior art, and details are not described herein again. It should be noted that the image encoder 500 does not necessarily have to include all of the components shown in FIG. 5; in addition, the image encoder 500 may also include components not shown in FIG. 5, and reference may be made to the prior art.
  • the number of bits used for the color component may not be used when encoding the image frame.
  • the information is encoded into the PPS corresponding to the image frame; further, the number information of the color component may not be encoded into the PPS corresponding to the image frame.
  • the redundant information can be reduced, the bit cost of the encoding is further reduced, and the syntax structure of the HEVC can be optimized.
  • An embodiment of the present invention provides an image processing apparatus, where the image processing apparatus includes the image encoder as described in Embodiment 2, and further includes a corresponding image decoder.
  • the same content of the embodiment of the present invention and the first and second embodiments will not be described again.
  • FIG. 6 is a schematic diagram of an image processing apparatus according to an embodiment of the present invention. As shown in FIG. 6, the image processing apparatus 600 includes:
  • the image encoder 601 determines the number information of the color component and the bit number information used by the color component; and encodes the bit number information used by the color component to the image frame when encoding the parameter of the image frame Corresponding PPS; and/or
  • the image decoder 602 determines the bit number information used by the color component according to the SPS corresponding to the stream in which the image frame is located, and decodes the image frame.
  • the image encoder 601 may not encode the number information of the color component to the PPS corresponding to the image frame; and the image decoder 602 may determine the color component according to the SPS corresponding to the stream in which the image frame is located. Number of information.
  • the image encoder 601 may encode the number information of the color component and the bit number information used by the color component to the SPS corresponding to the stream when encoding the parameter of the stream in which the image frame is located. .
  • the image encoder 601 may also encode the number information of the color components to the PPS corresponding to the image frame.
  • the configuration of the image encoder 601 and/or the image decoder 602 can be referred to FIG. 5; that is, the architecture of the CPU plus Memory can be implemented.
  • the image encoder 601 can implement the image encoding method described in Embodiment 1, and the image decoder 602 can implement the image decoding method corresponding to the image encoding method of Embodiment 1.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an image processing apparatus, the program causes a computer to execute the image encoding method as described in Embodiment 1 in the image processing apparatus and / or the corresponding image decoding method.
  • Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an image encoding method and/or corresponding image decoding as described in Embodiment 1 in an image processing apparatus method.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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Abstract

La présente invention concerne un procédé et un appareil de codage d'image et un dispositif de traitement d'image. Le procédé de codage d'image consiste à : déterminer des informations concernant le nombre de composantes de couleur et des informations concernant le nombre de bits utilisés par les composantes de couleur; et ne pas coder les informations concernant le nombre de bits utilisés par chaque composante de couleur à un PPS correspondant à une trame d'image lorsque des paramètres de la trame d'image sont codés. Ainsi, des informations redondantes peuvent être réduites, les coûts binaires de codage sont en outre réduits et une structure grammaticale d'un HEVC peut être optimisée.
PCT/CN2015/091989 2015-10-15 2015-10-15 Procédé et appareil de codage d'image et dispositif de traitement d'image WO2017063168A1 (fr)

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CN201580080762.XA CN107710760A (zh) 2015-10-15 2015-10-15 图像编码方法、装置以及图像处理设备
PCT/CN2015/091989 WO2017063168A1 (fr) 2015-10-15 2015-10-15 Procédé et appareil de codage d'image et dispositif de traitement d'image

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WO2020169105A1 (fr) 2019-02-24 2020-08-27 Beijing Bytedance Network Technology Co., Ltd. Codage conditionnel d'indication d'utilisation de mode de palette
CN113678448A (zh) * 2019-04-09 2021-11-19 北京字节跳动网络技术有限公司 调色板模式编解码的条目构造
EP3987806A4 (fr) 2019-07-20 2022-08-31 Beijing Bytedance Network Technology Co., Ltd. Codage conditionnel d'indication d'utilisation de mode de palette
CN114145013B (zh) 2019-07-23 2023-11-14 北京字节跳动网络技术有限公司 调色板模式编解码的模式确定
EP3991411A4 (fr) 2019-07-29 2022-08-24 Beijing Bytedance Network Technology Co., Ltd. Codage en mode palette dans un procédé de prédiction

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US20130170548A1 (en) * 2010-08-03 2013-07-04 Nec Corporation Video encoding device, video decoding device, video encoding method, video decoding method and program
CN103535035A (zh) * 2011-05-16 2014-01-22 联发科技股份有限公司 用于亮度和色度分量的样本自适应偏移的方法和装置
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