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Video indexing method, and video indexing device

An indexing and video technology, applied in digital video signal modification, television, character and pattern recognition, etc., can solve problems such as dense image display

Inactive Publication Date: 2012-08-08
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, being able to receive TV on a mobile phone has caused issues with displaying dense images on low-sized screens

Method used

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  • Video indexing method, and video indexing device
  • Video indexing method, and video indexing device
  • Video indexing method, and video indexing device

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0051] figure 1 A coding device according to the coding standard H.264 / AVC implementing a preferred embodiment of the invention is shown. In the preferred embodiment, a video stream is encoded.

[0052] Present the current frame F at the encoder input n to be encoded by the encoder. The frame is coded in slices, that is, the frame is divided into sub-units, each sub-unit containing a certain number of macroblocks corresponding to groups of 16x16 pixels. Each macroblock is coded in intra or inter mode. Macroblocks are coded based on the reconstructed frame, whether in intra or inter mode. Module 109 determines that the encoding mode is the intra mode of the current image according to the content of the image. In intra mode, P( figure 2 shown) includes the current frame F that was previously encoded, decoded and reconstructed n sampling of ( figure 2 uF’n in , u means unfiltered). In intra mode, based on one or more F' n-1 Frames are composed of P according to motion...

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PUM

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Abstract

The invention relates to a method and a device for indexing a coded video data stream. According to the invention,the video data stream comprises information relative to the location of regions of interest of each picture, said method comprises steps of: reception (T1) of coded video stream, recording the coded video stream on a recording support, decoding (T2) location information of regions of interest, selection (T3) of a region of interest per picture, decoding (T3) of video data, selecting (T4) a predetermined number of regions of interest for the video data stream from among the regionsof interest selected per picture, recording (T6) of the selected regions of interest.

Description

technical field [0001] The invention relates to a video indexing method and a video indexing device. Background technique [0002] Many image processing applications use the detection of regions of interest (ROI) to improve image quality. For example, an encoding device typically decodes regions of interest and allocates more resources for encoding these regions. [0003] Different methods are able to detect regions of interest in images. In particular, these methods are known to be based on building a salience map of an image or video, which takes into account visual parameters and achieves the sharpness of the zone where the human eye rests when viewing the image or video. [0004] Currently, the detection of regions of interest is mainly used before encoding in order to treat them specially during encoding by giving them more bandwidth, eg by reducing the quantization steps for these regions. [0005] The advent of mobile terminals (such as mobile phones, PDAs, game co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30H04N7/26H04N7/46G06K9/20
CPCH04N7/26276H04N7/465H04N21/4728H04N19/0026H04N21/4402H04N19/00757H04N19/17H04N19/59
Inventor 西尔万·法布雷雷吉斯·索查德皮埃尔·洛朗·拉戈雷尔奥利维耶·勒默尔菲利普·吉约泰尔萨穆埃尔·韦尔默朗
Owner THOMSON LICENSING SA