WO2020073228A1 - 一种对编码单元进行编码或解码的方法、装置和电子设备 - Google Patents

一种对编码单元进行编码或解码的方法、装置和电子设备 Download PDF

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Publication number
WO2020073228A1
WO2020073228A1 PCT/CN2018/109632 CN2018109632W WO2020073228A1 WO 2020073228 A1 WO2020073228 A1 WO 2020073228A1 CN 2018109632 W CN2018109632 W CN 2018109632W WO 2020073228 A1 WO2020073228 A1 WO 2020073228A1
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unit
encoding
mode
decoding
angle
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PCT/CN2018/109632
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English (en)
French (fr)
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姚杰
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富士通株式会社
姚杰
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Priority to PCT/CN2018/109632 priority Critical patent/WO2020073228A1/zh
Publication of WO2020073228A1 publication Critical patent/WO2020073228A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102Methods 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
    • H04N19/129Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]

Definitions

  • the present application relates to the field of information technology, and in particular, to a method, device, and electronic device for encoding or decoding an encoding unit.
  • a unified data structure can be used to represent the image structure of a video image.
  • This unified data structure is called a unified transform coding structure (uniform transform unit structure).
  • the coding unit (CU) of the video image can be divided into several uniform transformation units (uniform transformation unit). All the unified transformation units in a coding unit have the same shape and area, where The shape of each unified conversion unit may be a rectangle, such as a square.
  • a coding unit with a size of 2 m * 2 n it has 2 m pixels in the horizontal direction and 2 n pixels in the vertical direction, where m and n are both natural numbers, and m ⁇ n.
  • the coding unit can be divided into several unified conversion units according to the following possible division modes: Mode 1, the coding unit is used as a unified conversion unit, that is, the coding unit contains only one unified conversion unit; Mode 2, the coding The size of each unified conversion unit in the unit is 2 n * 2 n , thus, the coding unit contains 2 mn unified conversion units; method 3, the size of each unified conversion unit in the coding unit is 2 n-1 * 2 n-1 , therefore, the coding unit contains 4 * 2 mn unified conversion units; method 4, the size of each unified conversion unit in the coding unit is 2 n-2 * 2 n-2 , thus , The coding unit contains 16 * 2 mn unified conversion units; ..., and so on. In the last possible division
  • UTU mode unified conversion unit mode
  • FIG. 1 is a schematic diagram of the correspondence between the value of UTU mode and the division result of the coding unit.
  • the coding unit CU
  • UTU mode 1
  • UTU mode 2
  • UTU mode 2
  • UTU mode 2
  • UTU mode 2
  • UTU mode 3
  • UTU mode 3
  • each unified conversion unit (UTU) in the encoding unit is encoded or decoded, respectively.
  • the inventor of the present application found that when UTU mode is not 0, it is necessary to encode or decode each unified conversion unit (UTU) in the coding unit (CU) in a certain order.
  • the intra prediction mode intra prediction mode
  • the unified conversion units (UTU) are processed in the same order Encoding or decoding, therefore, the accuracy of intra prediction will be affected.
  • Embodiments of the present application provide a method, an apparatus, and an electronic device for encoding or decoding an encoding unit.
  • the intra prediction mode (intra prediction mode) adopted by the encoding unit
  • the conversion unit in the encoding unit is determined to be encoded. Order, thereby, can improve the accuracy of intra prediction, thereby improving the accuracy of encoding and decoding.
  • an apparatus for encoding or decoding a coding unit (Code) including: a determining unit, which is used to include more than two conversion units in the coding unit (CU) In the case of (TU, Transform Unit), according to the intra prediction mode (intra prediction mode) used by the encoding unit for encoding or decoding, the order in which the conversion units in the encoding unit are encoded or decoded is determined .
  • a determining unit which is used to include more than two conversion units in the coding unit (CU)
  • intra prediction mode intra prediction mode
  • a method for encoding or decoding a coding unit (Code) including: including more than two conversion units (TU, Transform Unit) in a coding unit (CU)
  • intra prediction mode intra prediction mode
  • the order of encoding or decoding the conversion units in the encoding unit is determined.
  • an electronic device including the device described in the first aspect of the foregoing embodiment.
  • the beneficial effect of the embodiment of the present application is that: according to the intra-prediction mode adopted by the coding unit, the order in which the conversion units in the coding unit are coded is determined, whereby the accuracy of intra-prediction can be improved, thereby improving coding and Decoding accuracy.
  • FIG. 1 is a schematic diagram of the correspondence between the value of UTU mode and the division result of the coding unit
  • FIG. 2 is a schematic diagram of a method of encoding or decoding an encoding unit according to Embodiment 1 of the present application;
  • FIG. 3 is a schematic diagram of the mapping relationship between the angle mode and each angle in Embodiment 1 of the present application;
  • FIG. 4 (A), FIG. 4 (B) and FIG. 4 (C) are schematic diagrams of encoding or decoding each conversion unit (TU) in the coding unit (CU) in the vertical direction according to Embodiment 1 of the present application;
  • FIG. 5 (A), FIG. 5 (B) and FIG. 5 (C) are schematic diagrams of encoding or decoding each conversion unit (TU) in the coding unit (CU) in the horizontal direction according to Embodiment 1 of the present application;
  • FIG. 6 is a schematic diagram of an apparatus for encoding or decoding an encoding unit according to Embodiment 2 of the present application;
  • FIG. 7 is a schematic diagram of the configuration of an electronic device according to Embodiment 3 of the present application.
  • the terms “first”, “second”, etc. are used to distinguish different elements in terms of titles, but do not mean the spatial arrangement or chronological order of these elements, and these elements should not be used by these terms Restricted.
  • the term “and / or” includes any and all combinations of one or more of the associated listed terms.
  • the terms “comprising”, “including”, “having”, etc. refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • Embodiment 1 of the present application provides a method for encoding or decoding a coding unit (Code Unit, CU).
  • FIG. 2 is a schematic diagram of a method of encoding or decoding an encoding unit according to this embodiment. As shown in FIG. 2, the method includes:
  • Step 201 When the coding unit (CU) includes more than two transform units (TU, Transform Unit), determine according to the intra prediction mode (intra prediction mode) used by the coding unit for encoding or decoding The order of encoding or decoding the conversion unit in the encoding unit.
  • TU transform unit
  • Transform Unit transform unit
  • the order of encoding the conversion units in the encoding unit is determined according to the intra-prediction mode adopted by the encoding unit, whereby the accuracy of intra-prediction can be improved, thereby improving the accuracy of encoding and decoding Sex.
  • the conversion unit (TU) in the coding unit (CU) may be a unified conversion unit (UTU).
  • the conversion unit (TU) is a unified conversion unit (UTU) as an example.
  • the conversion unit (TU) also It may be a conversion unit other than a unified conversion unit (UTU).
  • the case where the coding unit (CU) includes more than two conversion units (TU) may be, for example, a case where UTU mode is not 0.
  • the coding unit may use an intra prediction mode to encode or decode each conversion unit (TU).
  • the types of intra prediction modes can be 35, and each type can be represented by a corresponding mode number (for example: mode The number 0 indicates a planar mode; the mode number 1 indicates a mean mode (DC mode); the mode numbers 2 to 34 indicate an angular mode (angular mode).
  • mode The number 0 indicates a planar mode; the mode number 1 indicates a mean mode (DC mode); the mode numbers 2 to 34 indicate an angular mode (angular mode).
  • FIG. 3 is a schematic diagram of the mapping between the angle mode and each angle in this embodiment.
  • the numbers along the X axis indicate the angle between the line connecting the coding unit and the reference block and the vertical direction
  • the numbers along the Y axis indicate the line connecting the coding unit and the reference block and the vertical direction Angle.
  • each arrow indicates an angle mode
  • the number indicated by the arrow indicates that the angle mode corresponds to the angle between the line connecting the coding unit and the reference block and the vertical or horizontal direction.
  • the arrow pointing to the X axis represents the vertical mode in the angle mode
  • the arrow pointing to the Y axis represents the horizontal mode in the angle mode
  • Table 1 below shows a mapping relationship between each mode number in the angle mode and each included angle shown in FIG. 3.
  • the mode numbers of the horizontal mode in the angle mode are 2-17.
  • the horizontal angle In the horizontal mode, the angle between the line connecting the coding unit and the reference block and the horizontal direction is called the horizontal angle.
  • the horizontal angle can range from -32 degrees to 32 degrees.
  • the mode numbers of the vertical mode in the angle mode are 18 to 3, and in addition, the angle mode with the mode number 34 can be regarded as the vertical mode.
  • the angle between the line connecting the coding unit and the reference block and the vertical direction is called a vertical angle, and the range of the vertical angle may be -32 degrees to 32 degrees.
  • the types of intra prediction modes may not be limited to the above description.
  • the types of intra prediction modes may reach 67 in total.
  • step 201 of this embodiment when the intra prediction mode of the coding unit (CU) is an angular mode, the conversion unit (TU) in the coding unit (CU) is determined according to the angle corresponding to the angular mode The order of encoding or decoding.
  • the order of encoding or decoding determined in step 201 is: the vertical arrangement along the two or more conversion units (TU)
  • the (vertical) direction encodes or decodes the conversion unit (TU) in the coding unit.
  • the order of encoding or decoding determined in step 201 is: arranged along the two or more conversion units (TU)
  • the horizontal (horizontal) direction encodes or decodes the conversion unit (TU) in the coding unit.
  • 4 (A), 4 (B) and 4 (C) are schematic diagrams of encoding or decoding each conversion unit (TU) in the coding unit (CU) in the vertical direction.
  • the dotted arrows in FIG. 4 (A) indicate that each conversion unit 401a in the encoding unit 400a is encoded or decoded in the vertical direction.
  • the dotted arrows in FIG. 4 (B) indicate that each conversion unit 401b in the encoding unit 400b is encoded or decoded in the vertical direction.
  • the dotted arrows in FIG. 4 (C) indicate that each conversion unit 401c in the encoding unit 400c is encoded or decoded in the vertical direction.
  • the number in each conversion unit indicates the order of encoding or decoding, and the larger the number, the order of encoding or decoding of the conversion unit 401a The farther back.
  • the coding units 400a, 400b, and 400c use the horizontal mode in the angular mode for intra prediction, that is, the angle corresponding to the angle mode It is a horizontal angle. Therefore, the order of encoding or decoding determined by step 201 is: encoding or decoding the conversion units in the coding unit along the vertical direction in which the conversion units in the coding unit are arranged.
  • the reference pixel is the pixel in the left column of the conversion unit (TU). Therefore, when the encoding or decoding order of the conversion unit is set to be in the vertical direction, the conversion unit (TU) The reference pixels in the left column can be obtained, thereby improving the accuracy of intra prediction.
  • FIG. 5 (A), FIG. 5 (B) and FIG. 5 (C) are schematic diagrams of encoding or decoding each conversion unit (TU) in the coding unit (CU) in the horizontal direction.
  • the dotted arrows in FIG. 5 (A) indicate that each conversion unit 501a in the encoding unit 500a is encoded or decoded in the horizontal direction.
  • the dotted arrows in FIG. 5 (B) indicate that each conversion unit 501b in the encoding unit 500b is encoded or decoded in the vertical direction.
  • the dotted arrows in FIG. 5 (C) indicate that each conversion unit 501c in the encoding unit 500c is encoded or decoded in the vertical direction.
  • the number in each conversion unit indicates the order of encoding or decoding, and the larger the number, the order of encoding or decoding of the conversion unit 501a The farther back.
  • the coding units 500a, 500b, and 500c use the vertical mode in the angular mode for intra prediction, that is, the angle corresponding to the angle mode It is a vertical angle. Therefore, the order of encoding or decoding determined in step 201 is to encode or decode the conversion units in the coding unit along the horizontal direction in which the conversion units in the coding unit are arranged.
  • the reference pixel is a pixel on the upper side of the conversion unit (TU). Therefore, when the encoding or decoding order of the conversion unit is set to be along the horizontal direction, the conversion unit (TU) The reference pixels in the upper column can be obtained, thereby improving the accuracy of intra prediction.
  • the order of encoding or decoding determined by step 201 may be: along the coding unit (CU)
  • the horizontal direction in which the two or more conversion units (TUs) are arranged encodes or decodes the conversion units in the coding unit.
  • the schematic diagram of encoding or decoding the conversion unit in the encoding unit in the horizontal direction may be as shown in FIG. 5 (A), FIG. 5 (B), and FIG. 5 (C), for example.
  • the method of encoding or decoding the encoding unit may further include:
  • Step 202 In accordance with the order determined in step 201, encode or decode each conversion unit (TU) in the coding unit (CU) according to the intra prediction mode adopted by the coding unit (CU).
  • step 202 the same intra prediction is used to encode or decode each conversion unit (TU) in the coding unit (CU).
  • TU conversion unit
  • CU coding unit
  • the order of encoding the conversion units in the encoding unit is determined according to the intra-prediction mode adopted by the encoding unit, whereby the accuracy of intra-prediction can be improved, thereby improving the accuracy of encoding and decoding Sex.
  • Embodiment 2 provides an apparatus for encoding or decoding a coding unit (Code) (CU), which corresponds to the apparatus for encoding or decoding an encoding unit in Embodiment 1.
  • CU coding unit
  • FIG. 6 is a schematic diagram of an apparatus for encoding or decoding an encoding unit according to Embodiment 2 of the present application.
  • the apparatus 600 for encoding or decoding an encoding unit includes: a determining unit 601.
  • the determining unit 601 determines the intra prediction mode used by the coding unit for encoding or decoding ( intra prediction mode) to determine the order in which the conversion units in the coding unit are encoded or decoded.
  • the determining unit 601 determines the order in which the conversion units in the encoding unit are encoded or decoded according to the angle corresponding to the angular mode.
  • the order determined by the determining unit 601 is to encode the encoding in the vertical direction arranged by the two or more conversion units (TU)
  • the conversion unit (TU) in the unit encodes or decodes.
  • the order determined by the determining unit 601 is: the horizontal direction along the two or more conversion units (TU) is aligned with the horizontal direction.
  • the conversion unit (TU) in the coding unit performs encoding or decoding.
  • the order determined by the determining unit 601 is: conversion along the two or more The horizontal direction of the unit (TU) arrangement encodes or decodes the conversion unit (TU) in the coding unit.
  • the apparatus 600 for encoding or decoding the encoding unit further includes: a processing unit 602.
  • the processing unit 602 encodes or decodes each conversion unit (TU) in the coding unit (CU) according to the intra prediction mode of the coding unit in the order determined by the determination unit 601.
  • Embodiment 1 For the description of each unit of the apparatus for encoding or decoding the encoding unit, refer to Embodiment 1.
  • the order of encoding the conversion units in the encoding unit is determined according to the intra-prediction mode adopted by the encoding unit, whereby the accuracy of intra-prediction can be improved, thereby improving the accuracy of encoding and decoding Sex.
  • This embodiment 3 provides an electronic device. Since the principle of the device to solve the problem is similar to the method of embodiment 1, the specific implementation may refer to the method of embodiment 1, and the same content will not be repeated.
  • the electronic device 700 may include: a central processing unit (CPU) 701 and a memory 702; the memory 702 is coupled to the central processing unit 701.
  • the memory 702 can store various data; in addition, a data processing program is stored, and the program is executed under the control of the central processor 701 to instruct the electronic device according to the received signaling.
  • the functions of the apparatus 600 of Example 3 may be integrated into the central processor 701 of the terminal device 700.
  • the central processor 701 may be configured to implement the method for encoding or decoding the coding unit (Code) (CU) described in Embodiment 1.
  • the central processor 701 may be configured to control so that the terminal device 700 executes the method of encoding or decoding the coding unit (Code) (CU) of Embodiment 1.
  • the central processor 701 may be configured to: in the case that the coding unit (CU) includes more than two conversion units (TU, Transform Unit), according to the coding unit used for coding or
  • the decoded intra prediction mode determines the order in which the conversion units in the coding unit are encoded or decoded.
  • the central processor 701 may be further configured to: when the intra prediction mode is an angular mode, determine the conversion unit in the coding unit according to the angle corresponding to the angular mode The order of encoding or decoding.
  • the central processing unit 701 may be further configured to: when the angle corresponding to the angle mode is a horizontal angle, determine the order as follows: arranged along the two or more conversion units (TU) The conversion unit (TU) in the coding unit is encoded or decoded in the vertical direction.
  • the central processor 701 may be further configured to: when the angle corresponding to the angle mode is a vertical angle, determine the order as: arranged along the two or more conversion units (TU)
  • the conversion unit (TU) in the coding unit is encoded or decoded in a horizontal direction.
  • the central processor 701 may also be configured to: when the intra prediction mode is a planar mode or a mean (DC) mode, determine the order as follows: along two or more conversion units ( The horizontal direction of the TU) encodes or decodes the conversion unit (TU) in the coding unit.
  • the intra prediction mode is a planar mode or a mean (DC) mode
  • the central processor 701 may be further configured to encode or decode each conversion unit (TU) in the coding unit (CU) according to the above-described intra-prediction mode according to the determined sequence.
  • the above device 600 may be configured separately from the central processor 701.
  • the device 600 may be configured as a chip connected to the central processor 701, such as the unit shown in FIG. Control to realize the function of the device 600.
  • the order of encoding the conversion units in the encoding unit is determined according to the intra-prediction mode adopted by the encoding unit, thereby improving the accuracy of intra-prediction, thereby improving the accuracy of encoding and decoding Sex.
  • An embodiment of the present invention also provides a storage medium that stores a computer-readable program, where the computer-readable program causes an apparatus or electronic device that encodes or decodes an encoding unit to perform the encoding or the encoding unit described in Embodiment 1. Decoding method.
  • An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in an apparatus or electronic device that encodes or decodes an encoding unit, the program causes the device or electronic device that encodes or decodes the encoding unit to execute The method for encoding or decoding an encoding unit in Embodiment 1.
  • the above device and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to such a computer-readable program which, when executed by a logic component, can enable the logic component to implement the above-described device or constituent component, or enable the logic component to implement the various methods described above Or steps.
  • the invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and so on.
  • each device described in conjunction with the embodiments of the present invention may be directly embodied as hardware, software modules executed by a processor, or a combination of both.
  • one or more of the functional block diagrams shown in FIG. 6 and / or one or more combinations of the functional block diagrams may correspond to each software module of the computer program flow or each hardware module.
  • These software modules can correspond to the steps shown in FIG. 2 respectively.
  • These hardware modules can be realized by solidifying these software modules using a field programmable gate array (FPGA), for example.
  • FPGA field programmable gate array
  • the software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • a storage medium may be coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal.
  • the software module may be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • One or more of the functional block diagrams described in FIG. 6 and / or one or more combinations of the functional block diagrams may be implemented as a general-purpose processor, a digital signal processor (DSP), dedicated for performing the functions described in this application Integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof.
  • DSP digital signal processor
  • ASIC application Integrated circuit
  • FPGA field programmable gate array
  • it can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors, One or more microprocessors combined with DSP communication or any other such configuration.

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Abstract

本申请提供一种对编码单元进行编码或解码的方法、装置和电子设备,该对编码单元进行编码或解码的装置包括:确定单元,其用于在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据所述编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对所述编码单元中的转换单元进行编码或解码的顺序。本申请能够提高帧内预测的准确性,从而提高编码和解码的准确性。

Description

一种对编码单元进行编码或解码的方法、装置和电子设备 技术领域
本申请涉及信息技术领域,特别涉及一种对编码单元进行编码或解码的方法、装置和电子设备。
背景技术
在视频编码领域,可以用一种统一的数据结构来表示视频图像的图像结构,这种统一的数据结构被称为统一转换编码结构(uniform transform unit structure)。在统一转换编码结构中,视频图像的编码单元(Code Unit,CU)可以被划分为若干个统一转换单元(uniform transform unit),一个编码单元中的所有统一转换单元具有相同的形状和面积,其中,每一个统一转换单元的形状可以是矩形,例如正方形。
对于尺寸为2 m*2 n的编码单元,其水平(horizental)方向上具有2 m个像素,垂直(vertical)方向上具有2 n个像素,其中,m和n都是自然数,并且,m≥n。该编码单元可以按如下可能的划分方式被划分为若干个统一转换单元:方式1、将该编码单元作为一个统一转换单元,即,该编码单元中只包含一个统一转换单元;方式2、该编码单元中每一个统一转换单元的尺寸为2 n*2 n,由此,该编码单元中包含2 m-n个统一转换单元;方式3、该编码单元中每一个统一转换单元的尺寸为2 n-1*2 n-1,由此,该编码单元中包含4*2 m-n个统一转换单元;方式4、该编码单元中每一个统一转换单元的尺寸为2 n-2*2 n-2,由此,该编码单元中包含16*2 m-n个统一转换单元;……,依次类推,在最后一种可能的划分方式中,该编码单元中每一个统一转换单元的尺寸为2*2。
上述每一种划分方式可以分别对应于一种统一转换单元模式(UTU mode),其中,统一转换单元模式(UTU mode)可以被表示为一个数值,例如,上述方式1对应于UTU mode=0,上述方式2对应于UTU mode=1,上述方式3对应于UTU mode=2,上述方式4对应于UTU mode=3等。
图1是UTU mode的取值与编码单元划分结果的对应关系的一个示意图。在图1中,仅示出了UTU mode=0,1,2,3的情况。如图1所示,在UTU mode=0时,编码单元(CU)中只包含一个统一转换单元(UTU);在UTU mode=1时,如果m≥n, 每一个统一转换单元的尺寸为2 n*2 n,如果m<n,每一个统一转换单元的尺寸为2 m*2 m;在UTU mode=2时,如果m≥n,每一个统一转换单元的尺寸为2 n-1*2 n-1,如果m<n,每一个统一转换单元的尺寸为2 m-1*2 m-1;在UTU mode=3时,如果m≥n,每一个统一转换单元的尺寸为2 n-3*2 n-3,如果m<n,每一个统一转换单元的尺寸为2 m-3*2 m-3
在对视频图像的编码单元进行编码或解码时,对该编码单元中的各统一转换单元(UTU)分别进行编码或解码。
应该注意,上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明,并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
本申请的发明人发现,在UTU mode不为0的情况下,需要按照一定的顺序进行对编码单元(CU)中的各统一转换单元(UTU)进行编码或解码。在现有技术中,在采用帧内预测模式(intra prediction mode)进行编码或解码时,无论编码单元(CU)采用哪种帧内预测模式,都按照相同的顺序对各统一转换单元(UTU)进行编码或解码,因此,帧内预测的准确性会受到影响。
本申请实施例提供一种对编码单元进行编码或解码的方法、装置和电子设备,根据编码单元所采用的帧内预测模式(intra prediction mode),确定对该编码单元中的转换单元进行编码的顺序,由此,能够提高帧内预测的准确性,从而提高编码和解码的准确性。
根据本申请实施例的第一方面,提供一种对编码单元(Code Unit,CU)进行编码或解码的装置,包括:确定单元,其用于在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据所述编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对所述编码单元中的转换单元进行编码或解码的顺序。
根据本申请实施例的第二方面,提供一种对编码单元(Code Unit,CU)进行编码或解码的方法,包括:在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据所述编码单元所采用的用于编码或解码的帧内预测模式(intra  prediction mode),确定对所述编码单元中的转换单元进行编码或解码的顺序。
根据本申请实施例的第三方面,提供了一种电子设备,该电子设备包括如上述实施例的第一方面所述的装置。
本申请实施例的有益效果在于:根据编码单元所采用的帧内预测模式,确定对该编码单元中的转换单元进行编码的顺序,由此,能够提高帧内预测的准确性,从而提高编码和解码的准确性。
参照后文的说明和附图,详细公开了本申请的特定实施方式,指明了本申请的原理可以被采用的方式。应该理解,本申请的实施方式在范围上并不因而受到限制。在所附权利要求的条款的范围内,本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用,与其它实施方式中的特征相组合,或替代其它实施方式中的特征。
应该强调,术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在,但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外,在附图中,类似的标号表示几个附图中对应的部件,并可用于指示多于一种实施方式中使用的对应部件。
所包括的附图用来提供对本申请实施例的进一步的理解,其构成了说明书的一部分,用于例示本申请的实施方式,并与文字描述一起来阐释本申请的原理。显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。在附图中:
图1是UTU mode的取值与编码单元划分结果的对应关系的一个示意图;
图2是本申请实施例1的对编码单元进行编码或解码的方法的一个示意图;
图3是本申请实施例1的角度模式与各角度的映射关系(mapping)的一个示意图;
图4(A),图4(B)和图4(C)是本申请实施例1的按照垂直方向对编码单元(CU)中的各转换单元(TU)进行编码或解码的示意图;
图5(A),图5(B)和图5(C)是本申请实施例1的按照水平方向对编码单元(CU)中的各转换单元(TU)进行编码或解码的示意图;
图6是本申请实施例2的对编码单元进行编码或解码的装置的一个示意图;
图7是本申请实施例3的电子设备的构成示意图。
具体实施方式
参照附图,通过下面的说明书,本申请的前述以及其它特征将变得明显。在说明书和附图中,具体公开了本申请的特定实施方式,其表明了其中可以采用本申请的原则的部分实施方式,应了解的是,本申请不限于所描述的实施方式,相反,本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。下面结合附图对本申请的各种实施方式进行说明。这些实施方式只是示例性的,不是对本申请的限制。
在本申请实施例中,术语“第一”、“第二”等用于对不同元素从称谓上进行区分,但并不表示这些元素的空间排列或时间顺序等,这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在,但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中,单数形式“一”、“该”等包括复数形式,应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义;此外术语“该”应理解为既包括单数形式也包括复数形式,除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”,术语“基于”应理解为“至少部分基于……”,除非上下文另外明确指出。
实施例1
本申请实施例1提供一种对编码单元(Code Unit,CU)进行编码或解码的方法。
图2是本实施例的对编码单元进行编码或解码的方法的一个示意图,如图2所示,该方法包括:
步骤201、在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据该编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对该编码单元中的转换单元进行编码或解码的顺序。
在本实施例中,根据编码单元所采用的帧内预测模式,确定对该编码单元中的转 换单元进行编码的顺序,由此,能够提高帧内预测的准确性,从而提高编码和解码的准确性。
在本实施例中,编码单元(CU)中的转换单元(TU)可以是统一转换单元(UTU)。在本实施例下面的说明中,以转换单元(TU)是统一转换单元(UTU)为例进行说明,但是,需要说明的是,本实施例可以不限于此,例如,转换单元(TU)也可以是除了统一转换单元(UTU)之外的其它的转换单元。
在本实施例中,编码单元(CU)中包含两个以上转换单元(TU)的情况例如可以是UTU mode不为0的情况。
在本实施例中,编码单元(CU)可以采用帧内预测模式(intra prediction mode)对各转换单元(TU)进行编码或解码。
在高效视频编码(HEVC,High Eifficiency Video Coding)技术中,帧内预测模式(intra prediction mode)的种类可以是35种,每一个种类可以由相应的模式编号(mode number)来表示,例如:模式编号0表示平面模式(planar mode);模式编号1表示均值模式(DC mode);模式编号2~34表示角度模式(angular mode)。
图3是本实施例的角度模式与各角度的映射关系(mapping)的一个示意图。如图3所示,沿X轴的各数字表示表示该编码单元与参考块的连线和垂直方向的夹角,沿Y轴的各数字表示表示该编码单元与参考块的连线和垂直方向的夹角。在图3中,每一个箭头表示一种角度模式,该箭头所指示的数字表示该角度模式对应于该编码单元与参考块的连线和垂直方向或水平方向的夹角。
在图3中,指向X轴的箭头表示角度模式中的垂直模式,指向Y轴的箭头表示角度模式中的水平模式。
下表1表示角度模式中的各模式编号与图3所示的各夹角之间的一个映射关系。如表3所示,角度模式中的水平模式的模式编号为2~17,在水平模式中,该编码单元与参考块的连线与水平方向的夹角被称为水平(horizontal)角度,该水平角度的范围可以是-32度~32度。
如表3所示,角度模式中的垂直模式的模式编号为18~3,此外,模式编号为34的角度模式可以被认为是垂直模式。在垂直模式中,该编码单元与参考块的连线与垂直方向的夹角被称为垂直(vertical)角度,该垂直角度的范围可以是-32度~32度。
表1:
Figure PCTCN2018109632-appb-000001
此外,在本实施例中,帧内预测模式的种类可以不限于上述说明,例如,在H.266标准中,角度预测模式可以有65种,因而帧内预测模式的种类总共可以达到67种。
在本实施例的步骤201中,当编码单元(CU)的帧内预测模式为角度(angular)模式时,根据该角度模式对应的角度,确定对编码单元(CU)中的转换单元(TU)进行编码或解码的顺序。
例如,当角度模式对应的角度为水平(horizontal)角度时,即,角度模式为水平模式时,步骤201确定的该编码或解码的顺序为:沿该两个以上转换单元(TU)排列的垂直(vertical)方向对该编码单元中的转换单元(TU)进行编码或解码。
又例如,当角度模式对应的角度为垂直(vertical)角度时,即,角度模式为垂直模式时,步骤201确定的该编码或解码的顺序为:沿该两个以上转换单元(TU)排列的水平(horizontal)方向对该编码单元中的转换单元(TU)进行编码或解码。
图4(A),图4(B)和图4(C)是按照垂直方向对编码单元(CU)中的各转换单元(TU)进行编码或解码的示意图。
在图4(A)中,编码单元400a中具有多个转换单元401a,对应于图1中UTU mode=2,并且m=n的情况。图4(A)中的虚线箭头表示沿垂直方向对编码单元400a中的各转换单元401a进行编码或解码。
在图4(B)中,编码单元400b中具有多个转换单元401b,对应于图1中UTU mode=2,并且m>n的情况。图4(B)中的虚线箭头表示沿垂直方向对编码单元400b中的各转换单元401b进行编码或解码。
在图4(C)中,编码单元400c中具有多个转换单元401c,对应于图1中UTU mode=2,并且m<n的情况。图4(C)中的虚线箭头表示沿垂直方向对编码单元400c 中的各转换单元401c进行编码或解码。
在图4(A),图4(B)和图4(C)中,每个转换单元中的数字表示编码或解码的顺序,数字越大,表示对该转换单元401a进行编码或解码的顺序越靠后。
在图4(A),图4(B)和图4(C)中,编码单元400a、400b、400c采用角度(angular)模式中的水平模式进行帧内预测,即,与角度模式对应的角度为水平角度,因此,通过步骤201确定的编码或解码的顺序为:沿编码单元中的转换单元排列的垂直方向对该编码单元中的转换单元进行编码或解码。
在采用水平模式进行帧内预测的情况下,参考像素是转换单元(TU)左侧一列的像素,因此,在将转换单元的编码或解码顺序设定为沿垂直方向时,转换单元(TU)左侧一列的参考像素能够被获得到,从而提高帧内预测的准确性。
图5(A),图5(B)和图5(C)是按照水平方向对编码单元(CU)中的各转换单元(TU)进行编码或解码的示意图。
在图5(A)中,编码单元500a中具有多个转换单元501a,对应于图1中UTU mode=2,并且m=n的情况。图5(A)中的虚线箭头表示沿水平方向对编码单元500a中的各转换单元501a进行编码或解码。
在图5(B)中,编码单元500b中具有多个转换单元501b,对应于图1中UTU mode=2,并且m>n的情况。图5(B)中的虚线箭头表示沿垂直方向对编码单元500b中的各转换单元501b进行编码或解码。
在图5(C)中,编码单元500c中具有多个转换单元501c,对应于图1中UTU mode=2,并且m<n的情况。图5(C)中的虚线箭头表示沿垂直方向对编码单元500c中的各转换单元501c进行编码或解码。
在图5(A),图5(B)和图5(C)中,每个转换单元中的数字表示编码或解码的顺序,数字越大,表示对该转换单元501a进行编码或解码的顺序越靠后。
在图5(A),图5(B)和图5(C)中,编码单元500a、500b、500c采用角度(angular)模式中的垂直模式进行帧内预测,即,与角度模式对应的角度为垂直角度,因此,通过步骤201确定的编码或解码的顺序为:沿编码单元中的转换单元排列的水平方向对该编码单元中的转换单元进行编码或解码。
在采用垂直模式进行帧内预测的情况下,参考像素是转换单元(TU)上侧一列的像素,因此,在将转换单元的编码或解码顺序设定为沿水平方向时,转换单元(TU) 上侧一列的参考像素能够被获得到,从而提高帧内预测的准确性。
在本实施例中,当编码单元的帧内预测模式为平面(planar)模式或均值(DC)模式时,通过步骤201确定的编码或解码的顺序可以是:沿该编码单元(CU)中的该两个以上转换单元(TU)排列的水平(horizontal)方向对该编码单元中的转换单元进行编码或解码。其中,沿水平(horizontal)方向对该编码单元中的转换单元进行编码或解码的示意图例如可以如图5(A),图5(B)和图5(C)所示。
在本实施例中,如图2所示,对编码单元进行编码或解码的方法还可以包括:
步骤202、按照步骤201确定的顺序,根据该编码单元(CU)所采用的帧内预测模式,对该编码单元(CU)中的各转换单元(TU)进行编码或解码。
在步骤202中,采用相同的帧内预测,对该编码单元(CU)中的各转换单元(TU)进行编码或解码。关于对单个的转换单元进行编码或解码的具体方式,可以参考现有技术。
在本实施例中,根据编码单元所采用的帧内预测模式,确定对该编码单元中的转换单元进行编码的顺序,由此,能够提高帧内预测的准确性,从而提高编码和解码的准确性。
实施例2
本实施例2提供一种对编码单元(Code Unit,CU)进行编码或解码的装置,与实施例1的对编码单元进行编码或解码的装置对应。
图6是本申请实施例2的对编码单元进行编码或解码的装置的一个示意图,如图6所示,该对编码单元进行编码或解码的装置600包括:确定单元601。
在本实施例中,在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,确定单元601根据该编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对该编码单元中的转换单元进行编码或解码的顺序。
在本实施例中,当该帧内预测模式为角度(angular)模式时,该确定单元601根据该角度模式对应的角度,确定对该编码单元中的转换单元进行编码或解码的顺序。
在一个实施方式中,当角度模式对应的角度为水平(horizontal)角度时,确定单元601确定的该顺序为:沿该两个以上转换单元(TU)排列的垂直(vertical)方向 对所述编码单元中的转换单元(TU)进行编码或解码。
在另一个实施方式中,当角度模式对应的角度为垂直(vertical)角度时,确定单元601确定的该顺序为:沿该两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
此外,在本实施例中,当该编码单元(CU)的帧内预测模式为平面(planar)模式或均值(DC)模式时,该确定单元601确定的该顺序为:沿该两个以上转换单元(TU)排列的水平(horizontal)方向对该编码单元中的转换单元(TU)进行编码或解码。
如图6所示,在本实施例中,对编码单元进行编码或解码的装置600还包括:处理单元602。
在本实施例中,处理单元602按照确定单元601确定的顺序,根据该编码单元的帧内预测模式,对该编码单元(CU)中的各转换单元(TU)进行编码或解码。
关于该对编码单元进行编码或解码的装置的各单元的说明,可以参考实施例1。
在本实施例中,根据编码单元所采用的帧内预测模式,确定对该编码单元中的转换单元进行编码的顺序,由此,能够提高帧内预测的准确性,从而提高编码和解码的准确性。
实施例3
本实施例3提供一种电子设备,由于该设备解决问题的原理与实施例1的方法类似,因此其具体的实施可以参考实施例1的方法实施,内容相同之处不再重复说明。
图7是本申请实施例的电子设备的构成示意图。如图7所示,电子设备700可以包括:中央处理器(CPU)701和存储器702;存储器702耦合到中央处理器701。其中该存储器702可存储各种数据;此外还存储数据处理的程序,并且在中央处理器701的控制下执行该程序,以根据接收的信令对该电子设备进行指示。
在一个实施方式中,实施例3的装置600的功能可以被集成到终端设备700的中央处理器701中。其中,中央处理器701可以被配置为实现实施例1所述的对编码单元(Code Unit,CU)进行编码或解码的方法。
例如,中央处理器701可以被配置为进行控制,以使终端设备700执行实施例1的对编码单元(Code Unit,CU)进行编码或解码的方法。
在本实施例中,中央处理器701可以被配置为:在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据所述编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对所述编码单元中的转换单元进行编码或解码的顺序。
在本实施例中,中央处理器701还可以被配置为:当所述帧内预测模式为角度(angular)模式时,根据所述角度模式对应的角度,确定对所述编码单元中的转换单元进行编码或解码的顺序。
在本实施例中,中央处理器701还可以被配置为:当所述角度模式对应的角度为水平(horizontal)角度时,确定所述顺序为:沿该两个以上转换单元(TU)排列的垂直(vertical)方向对所述编码单元中的转换单元(TU)进行编码或解码。
在本实施例中,中央处理器701还可以被配置为:当所述角度模式对应的角度为垂直(vertical)角度时,确定所述顺序为:沿该两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
在本实施例中,中央处理器701还可以被配置为:当所述帧内预测模式为平面(planar)模式或均值(DC)模式时,确定所述顺序为:沿两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
在本实施例中,中央处理器701还可以被配置为:按照上述确定的顺序,根据上述帧内预测模式,对所述编码单元(CU)中的各转换单元(TU)进行编码或解码。
另外,该中央处理器701的其他配置方式可以参考实施例1,此处不再赘述。
在另一个实施方式中,上述装置600可以与中央处理器701分开配置,例如,可以将装置600配置为与中央处理器701连接的芯片,如图7所示的单元,通过中央处理器701的控制来实现装置600的功能。
在本实施例中,根据编码单元所采用的帧内预测模式,确定对该编码单元中的转换单元进行编码的顺序,由此,能够提高帧内预测的准确性,从而提高编码和解码的准确性。
本发明实施例还提供一种存储有计算机可读程序的存储介质,其中该计算机可读程序使得对编码单元进行编码或解码的装置或电子设备执行实施例1所述的对编码单元进行编码或解码的方法。
本发明实施例还提供一种计算机可读程序,其中当在对编码单元进行编码或解码 的装置或电子设备中执行该程序时,该程序使得对编码单元进行编码或解码的装置或电子设备执行实施例1的对编码单元进行编码或解码的方法。
本发明以上的装置和方法可以由硬件实现,也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序,当该程序被逻辑部件所执行时,能够使该逻辑部件实现上文所述的装置或构成部件,或使该逻辑部件实现上文所述的各种方法或步骤。本发明还涉及用于存储以上程序的存储介质,如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本发明实施例描述的在各装置中的各处理方法可直接体现为硬件、由处理器执行的软件模块或二者组合。例如,图6中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合,既可以对应于计算机程序流程的各个软件模块,亦可以对应于各个硬件模块。这些软件模块,可以分别对应于图2所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息;或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中,也可以存储在可插入移动终端的存储卡中。例如,若设备(例如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置,则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对图6描述的功能框图中的一个或多个和/或功能框图的一个或多个组合,可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或其它可编程逻辑器件、分立门或晶体管逻辑器件、分立硬件组件、或者其任意适当组合。针对图6描述的功能框图中的一个或多个和/或功能框图的一个或多个组合,还可以实现为计算设备的组合,例如,DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这些描述都是示例性的,并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围内。

Claims (13)

  1. 一种对编码单元(Code Unit,CU)进行编码或解码的装置,包括:
    确定单元,其用于在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据所述编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对所述编码单元中的转换单元进行编码或解码的顺序。
  2. 如权利要求1所述的装置,其中,
    当所述帧内预测模式为角度(angular)模式时,
    所述确定单元根据所述角度模式对应的角度,确定对所述编码单元中的转换单元进行编码或解码的顺序。
  3. 如权利要求2所述的装置,其中,
    当所述角度模式对应的角度为水平(horizontal)角度时,
    所述确定单元确定的所述顺序为:沿该两个以上转换单元(TU)排列的垂直(vertical)方向对所述编码单元中的转换单元(TU)进行编码或解码。
  4. 如权利要求2所述的装置,其中,
    当所述角度模式对应的角度为垂直(vertical)角度时,
    所述确定单元确定的所述顺序为:沿该两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
  5. 如权利要求1所述的装置,其中,
    当所述帧内预测模式为平面(planar)模式或均值(DC)模式时,
    所述确定单元确定的所述顺序为:沿两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
  6. 如权利要求1所述的装置,其中,所述对编码单元进行编码或解码的装置还包括:
    处理单元,其按照所述确定单元确定的顺序,根据上述帧内预测模式,对所述编码单元(CU)中的各转换单元(TU)进行编码或解码。
  7. 一种电子设备,具有如权利要求1-权利要求6中的任一项所述的对编码单元进行编码或解码的装置。
  8. 一种对编码单元(Code Unit,CU)进行编码或解码的方法,包括:
    在编码单元(CU)中包含两个以上转换单元(TU,Transform Unit)的情况下,根据所述编码单元所采用的用于编码或解码的帧内预测模式(intra prediction mode),确定对所述编码单元中的转换单元进行编码或解码的顺序。
  9. 如权利要求8所述的方法,其中,
    当所述帧内预测模式为角度(angular)模式时,根据所述角度模式对应的角度,确定对所述编码单元中的转换单元进行编码或解码的顺序。
  10. 如权利要求9所述的方法,其中,
    当所述角度模式对应的角度为水平(horizontal)角度时,
    确定所述顺序为:沿该两个以上转换单元(TU)排列的垂直(vertical)方向对所述编码单元中的转换单元(TU)进行编码或解码。
  11. 如权利要求9所述的方法,其中,
    当所述角度模式对应的角度为垂直(vertical)角度时,
    确定所述顺序为:沿该两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
  12. 如权利要求8所述的方法,其中,
    当所述帧内预测模式为平面(planar)模式或均值(DC)模式时,
    确定所述顺序为:沿两个以上转换单元(TU)排列的水平(horizontal)方向对所述编码单元中的转换单元(TU)进行编码或解码。
  13. 如权利要求8所述的方法,其中,所述对编码单元进行编码或解码的方法还包括:
    按照上述确定的顺序,根据上述帧内预测模式,对所述编码单元(CU)中的各转换单元(TU)进行编码或解码。
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