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Motion picture encoding method and motion picture decoding method

A technology of dynamic image and coding method, which is applied in image communication, television, simultaneous/sequential multi-television signal transmission, etc., can solve the problems of unknown variable speed reproduction, etc., and achieve the effect of high practical value

Inactive Publication Date: 2005-11-02
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] Thus, since the JVT allows very flexible prediction structures, without knowing the actual prediction structure, one may not know how to reproduce at variable speed

Method used

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  • Motion picture encoding method and motion picture decoding method
  • Motion picture encoding method and motion picture decoding method
  • Motion picture encoding method and motion picture decoding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Figure 7 It is a block diagram showing an embodiment of a video coding apparatus using the video coding method according to the present invention. Additionally, to proceed with image 3 Devices that operate in the same manner as each part of the conventional video encoding device 3 shown in , are assigned the same symbols, and descriptions thereof are omitted.

[0074] The moving picture coding device 1 is a device that compresses and codes an input image signal Vin and outputs a coded stream Str converted into a bit stream such as a variable length code, and includes: a motion detection unit 101, a motion compensation unit 102, a subtraction unit 103, an orthogonal transform unit 104, quantization unit 105, dequantization unit 106, inverse orthogonal transformation unit 107, addition unit 108, image memory 109, switch 110, prediction structure determination unit 111, variable length coding unit 112, transform generation unit 113, detection part 114, and common infor...

Embodiment 2

[0106] In Embodiment 1, an example was shown in which the variable-speed playback conversion RAM is arranged in the random access unit RAU. However, if the contents of the variable-speed playback conversion RAM of each random access unit RAU are the same, it is not necessary to arrange the variable-speed playback conversion RAM in the random access unit RAU. Reproduce Transform RAM.

[0107] Figure 13 It is a structural diagram of the flow of Example 2.

[0108] In this example, if Figure 13 The generation shown in (b) is based on Figure 9 The picture shown refers to the variable-speed playback map RAMTBL including a plurality of variable-speed playback maps PAM. In addition, each random access unit RAU is configured such as Figure 13 (a) shows the variable speed playback conversion identifier RAMID corresponding to which variable speed playback conversion RAM of the variable speed playback conversion table RAMTBL.

[0109] The variable-speed playback conversion table...

Embodiment 3

[0117] Figure 15 is a block diagram showing the structure of a video decoding device according to the video decoding method according to the present invention. Additionally, to proceed with Figure 4 Devices that operate in the same manner in each part of the shown conventional video decoding device 4 are denoted by the same reference numerals, and description thereof will be omitted.

[0118] The video decoding device 2 is a device for decoding the coded stream Str encoded by the video coding device 1 as described above, and includes a stream extraction unit 201, a variable length decoding unit 202, an extracted image selection unit 203, a motion compensation unit 204, and a stream extraction unit 204. Quantization unit 205 , inverse orthogonal transformation unit 206 , addition unit 207 , image memory 208 and memory control unit 209 .

[0119] The extracted picture selection unit 203 determines the picture to be decoded for reproduction at the reproduction speed indicated...

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Abstract

A moving picture coding apparatus (1) includes: a map creation unit (113) for creating variable speed reproduction information Map that is information necessary for variable speed reproduction according to a picture type Ptype; a variable length coding unit (112) for coding the variable speed reproduction information Map and placing it in a bit stream Str; a detection unit (114) for detecting the need of coding a picture parameter set PPS referred to by a current picture to be coded; and a common information addition unit (115) for adding the picture parameter set PPS to the current picture to be coded when the detection unit (114) detects the need of coding the picture parameter set PPS.

Description

technical field [0001] The present invention relates to a moving picture decoding method for encoding moving pictures for variable-speed reproducibility, a moving picture decoding method for decoding a thus encoded stream, and the stream. Background technique [0002] In recent years, ushered in the multimedia era of comprehensive processing of pixel values ​​such as sound and images, and the means of transmitting information to people from previous information media, such as newspapers, magazines, television, radios, and telephones, will be used as multimedia objects. Generally, the so-called multimedia refers not only to characters, but also to graphics, audio, and especially images. However, when the above-mentioned existing information media is used as the object of multimedia, the information must be expressed in digital form. [0003] However, if the amount of information held by the above-mentioned information media is estimated as the amount of digital information, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/783H04N7/24H04N7/26H04N7/46H04N7/50H04N9/804
CPCH04N19/00781H04N19/00721H04N19/00884H04N21/234327H04N21/435H04N7/50H04N7/462H04N21/440281H04N7/26946H04N21/235H04N9/8042H04N5/783H04N19/577H04N19/61H04N19/70
Inventor 野真也
Owner PANASONIC CORP