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Fast motion trick mode using non-progressive dummy bidirectional predictive pictures

A trick mode, bidirectional prediction technology, applied in the field of video systems, which can solve problems such as buffer overflow, image loss, and average number increase

Inactive Publication Date: 2005-02-02
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the skipping of B pictures, the average number of encoded data for the remaining pictures in the GOP, or the average number of bits in each picture increases
Such a shortcoming can lead to buffer overflow and image loss during display of trick mode video signals
[0006] In addition to bit rate issues, remote decoding of video signals has another disadvantage: in such a scheme, repeated display of non-progressive scan images may result in swing effect
However, these complete frames, constructed from interlaced fields, are also displayed in an alternating manner, thus creating the potential for wiggling artifacts

Method used

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  • Fast motion trick mode using non-progressive dummy bidirectional predictive pictures
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  • Fast motion trick mode using non-progressive dummy bidirectional predictive pictures

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Embodiment Construction

[0030] exist figure 1 A system 100 for implementing various advanced operating features according to aspects of the present invention is shown in block diagram form in FIG. However, the present invention is not limited to figure 1 This particular system is shown in , as the invention can be implemented using any other system capable of receiving a digitally encoded signal and transmitting that signal to a display device. Furthermore, the system 100 is not limited to reading from any particular type of storage medium Data can be stored or written to any particular type of storage medium, as the system 100 can use any storage medium capable of storing digitally encoded data.

[0031] The system 100 can include a controller 110 for reading data from a storage medium 112 and writing data to the storage medium 112 . System 100 may also have search engine 114 , microprocessor 116 , transmission buffer 117 , and display device 118 . Search engine 114 can include appropriate softwa...

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Abstract

The invention concerns a method (200) and system (100) performing a trick mode on a video signal containing a plurality of original pictures. The method includes the steps of selectively skipping (214) at least one of the original pictures to convert the video signal to a trick mode video signal in response to a trick mode command and selectively inserting (224) at least one dummy bidirectional predictive picture in the trick mode video signal using field-based prediction. The method can also include the steps of monitoring (220) the trick mode video signal in which the step of selectively inserting at least one dummy bidirectional predictive picture in the trick mode video signal can be done if the bit rate of the trick mode video signal exceeds a predetermined threshold.

Description

technical field [0001] The aspects of the present invention relate generally to video systems, and more particularly to video systems for recording or playing back digitally encoded video sequences. Background technique [0002] In today's home appliance market, digital television (DTV) and high-definition television (HDTV) are becoming popular. Many purchasers of these types of televisions also purchase digital video recorders or players, such as digital video disc (DVD) recorders or players, in order to watch previously recorded programs or to record their favorite programs. In particular, a combination of DTV (or HDTV) and digital video recorder or player may be an integral part of a home theater entertainment system. [0003] A digital video recorder or player typically includes a Moving Picture Experts Group (MPEG) decoder for decoding digitally encoded multimedia data stored on a disc played by the video recorder or player. If the digital video recorder or player is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/92G06T9/00H04N5/7828H04N5/783H04N5/85H04N9/804
CPCH04N5/85H04N5/783H04N21/4325H04N5/775G06T9/004H04N21/440281H04N9/8042H04N5/91
Inventor 林书唐纳德·H·威利斯
Owner THOMSON LICENSING SA