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Video encoding method and system

A video coding and video technology, applied in a video coding system, segmenting digital video frames, a video coding method, computer-readable media, and the field of video coding

Inactive Publication Date: 2013-01-23
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach reduces bandwidth efficiency

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  • Video encoding method and system
  • Video encoding method and system
  • Video encoding method and system

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Embodiment Construction

[0024] figure 1 A block diagram of a video encoding and decoding system 10 is illustrated. Such as figure 1 As shown, system 10 includes an encoder system 12 and a decoder system 14 connected by a transmission channel 16 . Encoder system 12 includes multiplexer (MUX) 18 , video encoder 20 , and audio encoder 22 . Decoder system 14 includes a demultiplexer (DEMUX) 26 , a video decoder 28 and an audio decoder 30 .

[0025] System 10 may, for example, provide two-way video transmission for video telephony. Accordingly, on opposite ends of the channel 16, reciprocal encoding, decoding, MUX and DEMUX components may be provided. In some embodiments, encoder system 12 and decoder system 14 may be included in a video communication device, such as a wireless mobile terminal equipped for video streaming, video telephony, or both. The mobile terminal supports videophone according to the ITU H.324M standard or other standards (such as RTP / UDP / IP).

[0026] Video encoder 20 generat...

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Abstract

The disclosure is directed to a video slicing technique that promotes low complexity, bandwidth efficiency and error resiliency. A video encoder places an RM close to the beginning of each logical transmission unit (LTU) so that all but a very small end segment of each video slice fits substantially within an LTU. Instead of requiring placement of RMs exactly at the LTU boundaries, a video encoder applies an approximate alignment technique. Video slices are encoded so that RMs are placed close to the beginning of each LTU, e.g., at the end of the first MB falling within the LTU. A portion of the last MB from the preceding slice carries over into the next LTU. Loss of an LTU results in loss of virtually the entire current slice plus a very small portion of the previous slice.

Description

[0001] Related Application Cross Reference [0002] This application claims the benefit of US Provisional Application No. 60 / 603,978, filed August 23, 2004, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to digital video coding, and in particular to a technique for segmenting digital video frames. Background technique [0004] In a typical video encoder implementation, a digital video frame is divided into multiple video slices at the encoder side to reduce the impact of data loss during transmission. Each video slice is encoded and decoded individually. When an error is detected, the decoder will hide all macroblocks (MBs) in the corrupted slice. By hiding, incorrectly decoded MBs are prevented from being displayed and disseminated, which could otherwise degrade the quality of the video presented to the user. [0005] A video slice usually starts with a resync marker (RM) that a decoder can use to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/64H04N19/89
CPCH04N19/00933H04N7/26265H04N19/00272H04N7/64H04N19/00872H04N19/174H04N19/89H04N19/68
Inventor 李彦辑蔡明章哈立德·希勒米·厄勒-马列
Owner QUALCOMM INC