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Fractional pixel interpolation method and encoding and decoding apparatus

A fractional pixel and interpolation method technology, applied in the field of network communication, can solve the problems of affecting video sequence coding efficiency, large amount of calculation, high computational complexity, etc., to reduce computational complexity and computational complexity, reduce computational complexity and computational complexity , Improve the effect of coding efficiency

Active Publication Date: 2009-01-21
TENCENT TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0016] It can be seen from the above description that the process of fractional pixel interpolation in H.264, especially the 6-tap filtering process in the half-pixel interpolation process, is a relatively complicated process with high computational complexity and large amount of calculation. Affected the coding efficiency of the video sequence

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  • Fractional pixel interpolation method and encoding and decoding apparatus
  • Fractional pixel interpolation method and encoding and decoding apparatus
  • Fractional pixel interpolation method and encoding and decoding apparatus

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Embodiment Construction

[0045] The core of the fractional pixel interpolation method and the codec device of the present invention is to determine a replacement filter correlated with the fractional pixel interpolation filter, and to perform fractional pixel interpolation process according to the replacement filter when the predetermined condition is met.

[0046] The technical solution provided by the present invention will be further described below based on the core idea of ​​the present invention.

[0047] There is a strong correlation between different filters, such as:

[0048] 6-tap filter (p1-5p2+20p3+20p4-5p5+p6+16) / 32(1)

[0049] It can be equivalently transformed into:

[0050] (-4p2+20p3+20p4-4p5+16+p1-p2-p5+p6) / 32 (2)

[0051] Formula (2) can be further equivalently transformed into:

[0052] (-p2+5p3+5p4-p5+4) / 8+(p1-p2+p6-p5) / 32 (3)

[0053] When p1 and p2 are equal, and p6 and p5 are equal, formula (3) can be equivalently transformed into:

[0054] (-p2+5p3+5p4-p5+4) / 8 (4)

[005...

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Abstract

The invention provides a fractional pixel interpolation method and the CODEC thereof, and its kernel: determining replacing filter related with fractional pixel interpolation filter, and as meeting preset conditions, according to the replacing filter, determining the fractional pixel interpolation. And it fully uses filter relativity and makes the fractional pixel interpolation by adaptively using the replacing filter related with the fractional pixel interpolation filter, reducing calculating complexity and load in the course of fractional pixel interpolation, especially in the 1 / 2-pixel interpolation course; and it achieves the purpose of raising coding efficiency.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a fractional pixel interpolation method and encoding and decoding equipment. Background technique [0002] With the development of multimedia technology and the rapid promotion of multimedia applications, video image compression standards and technologies have received widespread attention, especially the two standard organizations jointly formed by MPEG (Moving Picture Experts Group) and ITU (International Telecommunication Union). H.264, formulated by JVT, the standard formulation working group, has been applied in conference TV, videophone, streaming media, HD DVD, video surveillance, digital TV, 3G and other fields due to its advanced technical features and good compression performance. , and has broad application prospects. [0003] The compression processing framework of H.264 is attached figure 1 As shown, its basic processing unit is a 16×16 macroblock. H...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/46H04N19/80
Inventor 熊联欢谢清鹏
Owner TENCENT TECH (SHENZHEN) CO LTD
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