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A method and apparatus for fast channel change using a secondary channel video stream

A technology for assisting video and video streams, applied in the direction of digital video signal modification, color TV parts, TV system parts, etc., which can solve the problem of channel change waiting time and so on

Inactive Publication Date: 2011-06-29
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] This application solves the problem of waiting time for channel change that may occur in a multi-screen digital TV environment

Method used

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  • A method and apparatus for fast channel change using a secondary channel video stream
  • A method and apparatus for fast channel change using a secondary channel video stream
  • A method and apparatus for fast channel change using a secondary channel video stream

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Embodiment Construction

[0027] The present principles focus on methods and apparatus for rapid channel change between sub-picture and main-picture in a multi-picture display digital television environment. It will thus be appreciated that those skilled in the art will be able to devise various arrangements which, although not explicitly described or shown herein, embody the present principles and are included within its spirit and scope.

[0028] All examples and conditional language recited herein are intended for pedagogical purposes to assist the reader in understanding the present principles and concepts contributed by the inventor(s) advancing the art and should not be construed as being limited by such specific recitation examples and conditions. In the drawings, like numbers in the figures indicate similar elements.

[0029] Moreover, all statements herein reciting principles, aspects, and embodiments of the present principles, as well as specific examples thereof, are intended to encompass s...

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Abstract

Provided is a method and apparatus for fast channel change when changing the channel from a channel being viewed full screen as a main picture to a channel being viewed in a secondary channel program display window (e.g., a picture-in-picture (PIP) window). In one implementation, during the channel change, a secondary video stream (135) for a secondary channel program is up-sampled and displayed full screen while receiving the corresponding regular video stream (133) for the video program, of which program contents are identical to those of the secondary video stream. The program contents of the up-sampled secondary video stream is then be replaced seamlessly with those of the corresponding regular video stream (133) at the time when an instantaneous decode refresh (IDR) frame of the corresponding regular video stream (133) is received. In another implementation, the last GOP packets of the corresponding regular video stream (133), corresponding to a secondary video stream (135) being viewed in the secondary channel program display window, are buffered without being decoded. Upon a request for the channel change, the buffered GOP packets are decoded and displayed immediately while the decoder starts receiving the following frames in the corresponding regular video stream (133).

Description

[0001] Cross References to Related Applications [0002] This application claims benefit under 35 U.S.C § 119 of US Provisional Application No. 61 / 084,064, filed July 28, 2008. [0003] This application is related to the following co-pending, commonly owned U.S. patent applications: (1) Filed as International Patent Application No. XXX on July 25, 2007, entitled "METHOD AND APPARATUS FORFAST CHANNEL CHANGE FOR DIGITAL VIDEO" (Application No. PCT / US2007 / 016788, Thomson Case No. PU060146); (2) No.XXX filed as an International Patent Application on January 16, 2009 entitled "AN ENCODING METHOD TOIMPROVE EFFICIENCY IN SVC FAST CHANNEL CHANGE" (Application No. PCT / US2009 / 000325, Thomson Case No. PU080128); (3) filed as International Patent Application No. XXX on January 29, 2009 entitled "AN RTP PACKETIZATION METHOD FOR FAST CHANNEL CHANGE APPLICATION USING SVC" (Application No. PCT / US08 / 006333, Thomson Case No. PU080133); (4) filed as International Patent Application No.XXX on Oc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N5/44H04N5/45H04N5/50
CPCH04N5/45H04N5/50H04N21/4316H04N21/23439H04N21/4384H04N21/234H04N21/266H04N19/177
Inventor 约翰.Q.李卢秀萍吴镇宇
Owner THOMSON LICENSING SA
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