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Conversion device for video format down-conversion by an arbitrary ratio and method

A digital video and format technology, applied in the field of digital video format down conversion, can solve the problem of fixed conversion ratio and so on

Inactive Publication Date: 2007-05-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the method described in the prior art, the conversion ratio is fixed

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  • Conversion device for video format down-conversion by an arbitrary ratio and method
  • Conversion device for video format down-conversion by an arbitrary ratio and method
  • Conversion device for video format down-conversion by an arbitrary ratio and method

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Embodiment Construction

[0032] The present invention is aimed at motion compensation in digital video format down-conversion, and performs efficient motion compensation for digital video format down-conversion. The device includes:

[0033] frequency component computing means having an input for receiving an original pixel block, transforming said original pixel into a frequency domain, and providing transform coefficients;

[0034] coefficient weighting means for receiving said transform coefficients and multiplying each of said transform coefficients by one of predetermined constant values ​​to generate weighted transform coefficients;

[0035] pixel reconstruction means having an input for receiving said weighted transform coefficients and having an output for generating filtered pixels having a different resolution than said original pixels,

[0036] a decimation / interpolation parameter generator having a first input for receiving an original resolution (Ro), a second input for receiving a target...

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Abstract

The efficient motion compensation apparatus for digital video format down-conversion with variable conversion ratio is disclosed. The apparatus is characterized by an interpolation and decimation filters derived using a number of orthogonal transforms with variable transform sizes and implemented using efficient computation architectures. The computation architecture comprises the orthogonal transform kernel selection means, frequency component computing means, coefficient weighting means and pixel reconstruction means. A simple architecture for both interpolation and decimation filtering processes has been invented. The result is the dramatic reduction of the shifting and adding / subtracting operations, making them suitable for implementation in LSI realization of the video format down-conversion of digital video systems.

Description

technical field [0001] The invention relates to a device for down-converting a digital video format with an arbitrary conversion ratio, and a method thereof. The invention is applicable to the implementation of digital video format down-conversion used in digital video decoders. Typical applications of the invention include HDTV decoding, DVD decoders, video conferencing and picture-in-picture systems. Background technique [0002] Recently, low-resolution digital video decoders have received considerable attention in academia and industry. In the digital video decoding system, the format down-conversion can be realized by extracting the decoded full-resolution video sequence. High quality reconstructed video can be obtained by using this method. However, decimation of the decoded video sequence increases the complexity of full resolution video decoding. To reduce the computational load, memory size, and other constraints such as memory bandwidth and clock rate imposed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/30H04N7/26H04N7/01G06T3/40H03M7/30H04N1/387H04N19/50H04N19/513H04N19/59H04N19/60
CPCH04N19/00781H04N19/00472H04N7/26101H04N7/26941H04N7/26882H04N7/50H04N19/0089H04N19/00757H04N7/26702H04N19/00084H04N7/26377H04N7/465H04N19/00903H04N19/00296H04N7/2625H04N19/00478G06T3/4084H04N19/122H04N19/61H04N19/18H04N19/80H04N19/42H04N19/85H04N19/40H04N19/59
Inventor 秘蜜秋山利秀
Owner PANASONIC CORP