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Video encoding

A video encoder and encoder technology, applied in television, digital video signal modification, electrical components, etc., can solve problems such as unclear consideration of rate and distortion, and inability to accurately quantify redundancy.

Inactive Publication Date: 2012-04-11
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the disadvantages of SAD is that it does not explicitly and accurately account for rate and distortion
Therefore, the redundancy cannot be quantified accurately, and thus the chosen predictive macroblock partition may not be the most efficient choice
Therefore, in some cases, utilizing the SAD method may actually result in sub-optimal performance

Method used

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Embodiment Construction

[0031] Reference will now be made in detail to some embodiments, examples of which are illustrated in the accompanying drawings. It will be understood that the described embodiments are not intended to limit what is described. On the contrary, the description is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the description as defined by the claims. Also, in the detailed description, numerous specific details are set forth in order to provide a thorough understanding. However, it will be understood by one of ordinary skill in the art that this description may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present description.

[0032] Some portions of the detailed description that follows are presented in terms of procedures, logic blocks, processes, ...

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Abstract

An embodiment is directed to a method for selecting a predictive macroblock partition from a plurality of candidate macroblock partitions in motion estimation and compensation in a video encoder including determining a bit rate signal for each of the candidate macroblock partitions, generating a distortion signal for each of the candidate macroblock partitions, calculating a cost for each of the candidate macroblock partitions based on respective bit rate and distortion signals to produce a plurality of costs, and determining a motion vector from the costs. The motion vector designates the predictive macroblock partition.

Description

technical field [0001] This application relates to video encoders and cost functions used therein. Background technique [0002] Video compression involves the compression of digital video data. Video compression is used to efficiently encode video data in video file formats and streaming video formats. Compression is the reversible conversion of data to a format with fewer bits, usually performed so that the data can be stored or transmitted more efficiently. Compression is lossless if decompression, the reverse of the process described, produces an exact replica of the original data. Lossy compression, usually applied to image data, does not allow for an exact replica of the original image to be reproduced, but is more efficient. Although lossless video compression is possible, it is almost never used in practice. Standard video data rate reduction involves dropping data. [0003] Video is basically a three-dimensional array of colored pixels. Two dimensions serve as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26
CPCH04N19/00781H04N19/00278H04N19/00672H04N19/00175H04N19/00018H04N19/00351H04N19/176H04N19/147H04N19/61H04N19/103H04N19/19H04N19/567H04N19/51
Inventor 拉戈哈文德拉·C·纳加拉杰王凯纳伦德拉纳特·马拉亚特
Owner QUALCOMM INC