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Spatial scalable compression

A technology of content filtering and space, applied in the direction of TV, electrical components, pulse modulation TV signal transmission, etc., can solve the problems of low bit rate, short recording/playing time, introduction of high definition, etc., and achieve the effect of reducing bit rate

Inactive Publication Date: 2005-02-02
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the desire to store high-definition video signals requires lower bit rates normally deliverable through common compression standards
This may make it difficult to introduce high definition over existing standard definition systems because the recording / playback time becomes too small

Method used

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Embodiment Construction

[0019] figure 2 is a block diagram of a layered video encoder / decoder 200 according to one embodiment of the present invention. The encoder / decoder 200 includes encoding sections 201+203 and a decoding section 205 . A high-resolution video stream 202 is input to the basic encoding unit 201 . The video stream 202 is then split by a splitter 204 such that the video stream is sent to a low pass filter 206 and a second splitter 211 . A low-pass filter or down-sampling unit 206 reduces the resolution of the video stream, which is then fed to a base encoder 208 . An elementary encoder 208 encodes the downsampled video stream and outputs an elementary stream 209 in a known manner. In this embodiment, base encoder 208 outputs the local decoder output to up-conversion unit 210 . The up-conversion unit 210 reconstructs the filtered resolution from the locally decoded video stream and provides, in known manner, the reconstructed video stream in substantially the same resolution form...

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PUM

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Abstract

A more efficient spatial scalable compression scheme using adaptive content filtering is disclosed. The amount of video compression of a spatial scalable compression scheme is increased by the introduction of a multiplier on the residual stream of the enhancement layer. The multiplier is controlled by gain values for each pixel or group of pixels in each frame of video from a picture analyzer, wherein the gain values tend toward zero for areas with little or no detail and tends toward one for edges and text. Thus, the multiplier acts as a filter to reduce the amount of bits spent on irrelevant data of the enhancement layer. The multiplier also allows dynamic resolution compression.

Description

technical field [0001] The present invention relates to a video encoder / decoder, and more particularly to a video encoder / decoder with a spatially scalable compression scheme using adaptive content filtering or dynamic resolution. Background technique [0002] Due to the sheer volume of data inherent in digital video, full-motion, high-definition digital video signals are an obvious problem in the development of high-definition television. More specifically, each digital image frame is a still image formed from an array of pixels according to the display resolution of a particular system. As a result, the amount of raw digital information included in a high resolution video sequence is enormous. In order to reduce the amount of data that has to be sent, compression schemes are used to compress the data. Various video compression standards or procedures have been established, including MPEG-2, MPEG-4, and H.263. [0003] Many applications are enabled where video is availab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30H04N7/46H04N7/50
CPCH04N7/26079H04N19/00278H04N19/00751H04N19/00721H04N7/26319H04N19/00321H04N19/00066H04N7/26058H04N19/00424H04N19/0009H04N19/00757H04N19/00781H04N7/26351H04N7/462H04N7/30H04N19/00193H04N19/00357H04N19/0069H04N7/26297H04N7/468H04N7/26361H04N7/26244H04N7/3033H04N19/00775H04N7/50H04N19/0089H04N7/465H04N19/00078H04N19/00127H04N7/26377H04N19/00266H04N7/2617H04N7/26271H04N7/26069H04N7/26867H04N19/117H04N19/12H04N19/124H04N19/132H04N19/152H04N19/172H04N19/176H04N19/187H04N19/192H04N19/30H04N19/517H04N19/577H04N19/587H04N19/59H04N19/60H04N19/61H04N19/80
Inventor W·H·A·布鲁斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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