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Fast macroblock delta qp decision

A technology of quantization parameters and macroblocks, applied in digital video signal modification, image communication, electrical components, etc., can solve problems such as low quality and low bit rate

Inactive Publication Date: 2017-09-22
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quantization using a higher QP corresponds to a lower bit rate and lower quality

Method used

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  • Fast macroblock delta qp decision
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Embodiment Construction

[0021] Embodiments of the invention include systems and methods for encoding multimedia video to be displayed to a user. In one embodiment, the systems and methods are adapted to control the encoded data rate for compressed video. In some cases, video is transmitted wirelessly or via a wired network to a receiver for display. One step in compressing video involves quantizing the transmitted video data. Quantization involves dividing video data by a quantization parameter (QP) to reduce the data size into a smaller, more manageable form.

[0022] Because not all segments of video data contain the same amount of information, different video segments may be quantized differently at different QPs. If the QP selected for a given segment is too small, the compressed data will be of good quality, but will be highly compressed. This results in a high bit rate when transferring data to the receiver. Conversely, if the selected QP is too large, the data will be highly compressed and...

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Abstract

A system and method for encoding multimedia video is described. As video is encoded a quantization parameter is selected for each macroblock. As described herein, the quantization parameter for each macroblock may be selected by limiting the universe of all possible quantization parameters to a particular range of possible quantization parameter values. This increases the speed of video encoding by reducing the number of quantization parameters that are tested for each video macroblock.

Description

[0001] Information about divisional applications [0002] This case is a divisional application. The parent case of this divisional case is an invention patent application with an application date of February 21, 2009, an application number of 200980105681.5, and an invention title of "Determination of Fast Macroblock Incremental Quantization Parameters". [0003] related applications [0004] This application claims priority to US Provisional Patent Application No. 61 / 030,857, filed February 22, 2008, which is hereby incorporated by reference in its entirety. technical field [0005] Embodiments of the invention relate to multimedia image processing. More particularly, these embodiments relate to systems and methods for adaptively controlling the digital bit rate and compression quality of digital video in a video encoder. Background technique [0006] Digital video capabilities can be incorporated into a wide range of devices, including digital televisions, digital b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176H04N19/147H04N19/196H04N19/61H04N19/124
CPCH04N19/124H04N19/147H04N19/176H04N19/196H04N19/61
Inventor 叶琰马尔塔·卡切维奇培松陈
Owner QUALCOMM INC