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Slow forward trick mode playback of recorded video

A special effect mode and video technology, applied to color TV parts, TV system parts, TVs, etc., can solve the problem of image quality degradation

Inactive Publication Date: 2005-01-12
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is that a reduction in picture quality that is acceptable during normal playback becomes unacceptable during slow motion trick modes, especially very slow motion speeds

Method used

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  • Slow forward trick mode playback of recorded video
  • Slow forward trick mode playback of recorded video
  • Slow forward trick mode playback of recorded video

Examples

Experimental program
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Embodiment Construction

[0013] figure 1 A system 100 configured to implement various advanced operating features in accordance with the present invention is shown in block diagram form. However, the present invention is not limited to figure 1 The particular system shown, the invention may be practiced by any system capable of receiving digitally encoded signals. In addition, the system 100 is not limited to reading / writing data from / to any particular type of storage medium, and any storage medium capable of storing digitally encoded data can be used with the system 100 .

[0014] System 100 may include a receiver or controller 110 for reading / writing data from / to a storage medium 112 . The system 100 may also have a microprocessor 114 . A control and data interface may also be provided to allow the microprocessor 114 to control the operation of the decoder 116 and controller 110 . Appropriate software or firmware for routine operations performed by microprocessor 114 may also be provided in memo...

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PUM

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Abstract

The invention concerns a system and method (200) for producing an optimal slow forward trick mode playback of a portion of video containing a plurality of pictures wherein at least a portion of the plurality of pictures are predictive pictures. The invention includes the steps of: receiving (210) a slow forward trick mode command; and inhibiting (216) the display of an initial set of the plurality of pictures prior to obtaining a properly decoded predictive picture from the initial set of the plurality of pictures. The invention can also include the steps of: selectively decoding (214) the plurality of pictures to obtain the properly decoded predictive picture from the initial set of the plurality of pictures; and decoding (218) subsequent pictures in the portion of video using the properly decoded predictive picture to obtain subsequent properly decoded pictures.

Description

technical field [0001] The present invention relates generally to video recording systems, and more particularly to video recording systems for recording digitally encoded video sequences to disk media such as recordable digital video disks, hard drives, and magneto-optical disks. Background technique [0002] MPEG video generally uses three picture coding methods: intra (I) pictures, predictive (P) pictures, and bidirectional predictive (B) pictures. I pictures are encoded or decoded independently of any other pictures. This creates a reference picture from which P and B pictures or non-I pictures can be structured. [0003] However, a certain amount of MPEG video signals are coded without I pictures. In particular, many US cable systems broadcast MPEG signals that do not contain I pictures. At first glance, it appears that such a video signal cannot be decoded since there are no I pictures from which the P and B pictures are formed. [0004] Nevertheless, a video signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/76H04N5/783H04N5/92H04N5/93H04N7/32H04N9/804
CPCH04N5/85H04N5/783H04N5/781H04N9/8042H04N5/91
Inventor 唐纳德·H·威利斯
Owner THOMSON LICENSING SA