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Method and apparatus for controlling the insertion of additional fields or frames into first format picture sequence in order to construct second format picture sequence therefrom

An image sequence and format technology, applied in standard conversion, instrumentation, data recording, etc., can solve problems such as expensive, unapplicable, unacceptable motion jitter, and achieve the effect of low computational cost and minimal motion jitter

Inactive Publication Date: 2010-01-13
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] - Adopt conventional field / frame copy mechanism: this scheme leads to unacceptable conventional motion judder, and thus cannot be applied in practice
[0008] -Using Motion Compensated Frame Rate Conversion: This solution is a common solution to this conversion problem, it is expensive and therefore not suitable for consumer electronics

Method used

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  • Method and apparatus for controlling the insertion of additional fields or frames into first format picture sequence in order to construct second format picture sequence therefrom
  • Method and apparatus for controlling the insertion of additional fields or frames into first format picture sequence in order to construct second format picture sequence therefrom
  • Method and apparatus for controlling the insertion of additional fields or frames into first format picture sequence in order to construct second format picture sequence therefrom

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Embodiment Construction

[0042] exist figure 1 The video and audio signals encoded in 24p format are read from the optical disc D by an optical disc drive including a read head and an error correction PEC. The output signal reaches the video decoder VDEC and the audio decoder ADEC respectively through a track buffer and a demultiplexer TBM. The controller CTRL can control PEC, TBM, VDEC and ADEC. A user interface UI, and / or an interface IF between a television receiver or display (not shown) and the compact disc player, is used to switch the output of the player to 24fps mode or 25fps mode. The interface IF can automatically check the modes that the television receiver or display can handle and present. Said playback mode information is automatically derived from characteristic data (i.e. data about the available display modes of said television receiver or display) received by the interface IF, which communicates with all connected to the above-mentioned TV receiver or display device. Said charact...

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Abstract

The invention relates to a method and apparatus for controlling the insertion of additional fields or frames into a first format picture sequence in order to construct therefrom a second format picture sequence. The major TV systems in the world use interlaced scanning and either 50Hz field frequency or 60Hz field frequency. However, movies are produced in 24Hz frame frequency and progressive scanning, which format will be used for future digital video discs to be sold in 50Hz countries. In 50Hz display devices the disc content is presented with the original audio pitch but with repeated video frames or fields in order to achieve on average the original video source speed. However, the frame or field insertion is not carried out in a regular pattern but adaptively in order to reduce visible motion judder.

Description

technical field [0001] The present invention relates to methods and apparatus for controlling the insertion of additional fields or frames into a sequence of images in a first format having progressive scan frames, eg 24 frames per second, from which to create images in a second format, eg 25 frames per second. Background technique [0002] The world's major television systems use interlaced scanning and use a field frequency of 50Hz (such as PAL and SECAM in Europe and China), or a field frequency of 60Hz or close to 60Hz (such as NTSC in the United States and Japan), with 50i and 60i respectively. To represent. However, movies are made with progressive scan at a frame rate of 24Hz, represented by 24p, which corresponds to 48i in interlaced format. [0003] Currently, conversion from 24p film to 60Hz interlaced display is done by figure 2 This is accomplished by the "3:2 pulldown" technique shown, where a 3:2 pulldown field is added after every fifth field by field cyclin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/01G11B27/10
CPCG11B27/105G11B27/10H04N7/01G11B2220/2562
Inventor 卡斯滕·赫佩尔海因茨·沃纳·基森安德烈·舍韦佐马尔科·温特
Owner THOMSON LICENSING SA