Method and device for encoding digital video data

A technology for digital video and encoding equipment, applied in the field of video recommendations of the ITU-H.26X series, and can solve problems such as the deterioration of flash effects

Inactive Publication Date: 2007-05-02
ENTROPIC COMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the flashing effect is made worse by the deblocking filter adaptive action

Method used

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  • Method and device for encoding digital video data
  • Method and device for encoding digital video data

Examples

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Embodiment Construction

[0020] An example of a conventional encoding system is illustrated in FIG. 1. As explained, the input of the system receives an input video sequence 10, and the system includes a motion estimation module 11, a motion compensation module 12, a rate control module 13, a DCT module 14, a quantization (Q) module 15, a variable length coding (VLC) module 16, buffer 17 (on its output, the encoded bit stream 22 that must be stored or sent to the decoding side can be obtained), inverse quantization (Q -1 ) Module 18, inverse DCT (DCT -1 ) Transformation module 19, subtractor 20, adder 21 and frame memory 23. (Although this system includes multiple modules, those skilled in the art will recognize that the functions performed by different modules do not need to be separated into separate modules as shown in FIG. 1, and, for example, includes motion compensation module 12, inverse The module group of the quantization module 18 and the inverse DCT module 19 can be implemented as an "embedded ...

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Abstract

The invention relates to a method and device for encoding digital video data corresponding to an original sequence of images and available in the form of a video stream consisting of successive pictures which are either INTRA pictures or INTER pictures. The INTRA pictures are called I-pictures and encoded by means of a so-called INTRA mode without any reference to any past or future picture. The INTER pictures are either monodirectionally predicted pictures, called P-pictures and encoded with reference to a past or future reference picture which is an INTRA or INTER picture, or bidirectionally predicted pictures, called B-pictures and encoded with reference to one or more reference picture(s). The INTRA pictures themselves comprise either I-pictures placed at the beginning of a new group of pictures corresponding to a scene change, where no temporal redundancy is available, and called scene change I-pictures, or I-pictures placed in other locations, where some temporal redundancy is available, and called refresh pictures. According to the invention, the method is characterized in that, before being quantized and encoded in INTRA mode, said INTRA refresh pictures are replaced by an INTER picture having quality and artefacts substantially similar to those of the last encoded INTER picture(s).

Description

Technical field [0001] The present invention generally relates to the field of digital video compression. For example, it relates to the ISO / MPEG series of video coding standards (MPEG-1, MPEG-2, MPEG-4), and relates to the ITU-H.26X series of video recommendations (H.261). , H.263 and extensions, H.264). [0002] More specifically, the present invention relates to a method for encoding digital video data corresponding to a sequence of original images and available in the form of a video stream composed of successive pictures, wherein the successive pictures are either INTRA pictures or INTER pictures, where INTRA pictures are called I pictures, and are encoded using the so-called INTRA mode without referring to any past or future pictures, and INTER pictures themselves are either unidirectionally predicted pictures or bidirectionally predicted pictures. One-way predicted pictures are called P pictures and are coded with reference to past or future reference pictures that are INTR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/50H04N7/26
CPCH04N19/00781H04N19/0003H04N7/26888H04N19/00909H04N7/26031H04N7/26271H04N7/50H04N19/00266H04N19/172H04N19/61H04N19/107H04N19/86H04N19/51H04N19/142
Inventor S·瓦伦特
Owner ENTROPIC COMM INC
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