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Spatial enhancement layer rapid mode selection method of scalable video coding

A mode selection and video encoding technology, applied in digital video signal modification, television, electrical components, etc., can solve the problems of large amount of calculation, time-consuming, high computational complexity, etc., and achieve the effect of reducing encoding time and quantity

Inactive Publication Date: 2011-04-20
ZHEJIANG UNIV
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Problems solved by technology

[0004] In order to solve the problems in the prior art of the scalable video coding standard spatial enhancement layer macroblock mode selection that the computational complexity is too high and the amount of calculation is too large, resulting in a long time-consuming problem, the present invention provides a scalable video coding spatial enhancement layer Quick mode selection method

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  • Spatial enhancement layer rapid mode selection method of scalable video coding
  • Spatial enhancement layer rapid mode selection method of scalable video coding
  • Spatial enhancement layer rapid mode selection method of scalable video coding

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Embodiment Construction

[0037] Combine below Figure 1 to Figure 3 And embodiment further illustrates the present invention.

[0038] The present invention carries out simulation experiments on the JSVM12 test model, and compares the simulation results with the existing scalable video coding space enhancement layer standard full search method in terms of coding time, code rate and PSNR of the code stream.

[0039] The current encoding parameters set in this embodiment are shown in Table 1:

[0040] Table 1: Current encoding parameters of this embodiment

[0041] encoding parameters

spatial base layer

spatial enhancement layer

frame rate

15

15

resolution

QCIF

CIF

GOP / Intra Period

8

8

range of motion estimation

32

32

quantization parameter

26

30

[0042] Wherein, the encoder obtains the mode quality threshold table under the encoding parameters of the current period in advance, and the mode qual...

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Abstract

The invention discloses a spatial enhancement layer rapid mode selection method of scalable video coding. If the optimal mode of a macro block corresponding to a spatial basic layer of a current coding macro block is intra-frame mode, the current coding macro block selects the intra-frame mode as a candidate mode sub-set of the current coding macro block. If the optimal mode of the macro block corresponding to the spatial basic layer of the current coding macro block is inter-frame mode, the rate distortion cost threshold of the early skip of the Skip mode of the current coding macro block is calculated; if the rate distortion cost of the Skip mode of the current coding macro block is less than the rate distortion cost threshold, the Skip mode is selected as the optimal mode of the current coding macro block; and otherwise, the mode quality of the current coding macro block is calculated, and the candidate mode sub-set of the current coding macro block is selected according to the mode quality of the current coding macro block and the mode quality threshold under the current coding parameter maintained by a coder. Through the invention, the number of the coding modes for calculating the rate distortion cost is reduced, and the coding time is shortened.

Description

technical field [0001] The invention relates to a fast mode selection method for scalable video coding, in particular to a fast mode selection method for the spatial domain enhancement layer of scalable video coding. Background technique [0002] With the development of Internet and wireless network technology, the application of digital video technology can be seen everywhere, and the popularity of the third generation mobile communication technology (3G) makes efficient video coding technology more and more important. At the same time, the rapid development of network technology also requires video content to have various temporal and spatial resolutions and different reconstruction qualities. In order to make a single video stream satisfy the above-mentioned different requirements at the same time, Scalable Video Coding (SVC) is proposed. In scalable video coding, a video stream can be partially or fully decoded to obtain video images of different frame rates, different ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/34H04N19/567
Inventor 谢立吴珂
Owner ZHEJIANG UNIV
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