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Device for encoding a video data stream

A technology of data flow and encoding, applied in the direction of digital video signal modification, television, electrical components, etc., can solve expensive and other problems

Inactive Publication Date: 2009-07-29
NEXTREAM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This two-pass encoding technique is very powerful but expensive, especially if the encoder complies with the H26L standard defined in ITU-T Standard Recommendation H.264|ISO / IEC 14496-10 AVC

Method used

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  • Device for encoding a video data stream
  • Device for encoding a video data stream
  • Device for encoding a video data stream

Examples

Experimental program
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Embodiment Construction

[0056]The encoding device comprises first pass encoding means 5 . According to a preferred embodiment, these encoding means perform encoding according to the MPEG-2 standard.

[0057] These encoding means 5 are connected to an MPEG-2 measurement unit 6 .

[0058] The encoding device also comprises means 1 for generating a delay in the incoming video data stream from the encoding means 2 of the second pass.

[0059] According to a preferred embodiment described below, the second pass encoding means 2 perform encoding according to the H.264 standard.

[0060] The output of the second channel encoding means 2 is connected to the input of the second channel encoded information measuring means 4 .

[0061] The output of the H.264 measuring device 4 is connected to the input of the bit rate adjustment unit 3 .

[0062] The bit rate adjustment unit 3 also receives at input an output target bit rate signal and a measurement signal originating from the MPEG-2 measurement unit 6 . T...

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PUM

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Abstract

The present invention proposes a device for dual-pass encoding of video data streams, the device comprising: first type encoding means (5, 6) for performing the first encoding pass; second type encoding means (2, 4) , to perform the second encoding pass. According to the invention: the second type of encoding means (2, 4) is different from the first type of encoding means (5, 6), and the second type of encoding means (2, 4) uses information originating from the first encoding pass. Apply MPEG-2 and H.264 encoding.

Description

technical field [0001] The invention relates to a dual-pass encoding device and method for video data streams. Background technique [0002] New compression standards are being formed, and this standard increases the cost and complexity of encoding while allowing for improved encoding quality. The development of multimedia applications and the diversification of data networks make the data encoding system more and more complex. [0003] In the context of source images, many two-pass encoding techniques have been developed, where a first encoding pass provides precise information about the complexity of the image to be encoded, and then a second encoding pass encodes the image based on this complexity. [0004] This two-pass encoding technique is very powerful but expensive, especially if the encoder complies with the H26L standard defined in ITU-T Standard Recommendation H.264|ISO / IEC 14496-10 AVC. Contents of the invention [0005] The present invention proposes a devic...

Claims

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Application Information

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IPC IPC(8): H04N7/50H04N7/26
CPCH04N19/00363H04N19/00187H04N7/26164H04N19/00193H04N19/00284H04N19/0006H04N19/00587H04N19/0009H04N19/115H04N19/124H04N19/15H04N19/152H04N19/177H04N19/194H04N19/51H04N19/14H04N19/156
Inventor 格扎维埃·迪克卢阿兰·索兰蒂埃里·洛朗
Owner NEXTREAM