公开(公告)号：BRPI0808402A2

公开(公告)日：2014-07-08

申请号：BRPI0808402

申请日：2008-02-29

Applicant: QUALCOMM INC

Inventor： LOUKAS JR SERAFIM S

IPC: H04N7/24

Abstract: In general, this disclosure describes techniques of compensating for differences between a clock associated with an input stream of media data and a clock associated with an output stream of media data. Due to drift between a clock that governs the rate at which a transcoder receives media data units ("MDUs") and a clock that governs the rate at which the transcoder outputs MDUs, the transcoder may receive MDUs at a rate that is faster or slower than a rate at which the transcoder outputs the MDUs. The transcoder compensates for such differences by identifying sets of received MDUs that account for a time equal to an output period minus a correction magnitude, modifying the identified sets of MDUs such that the sets of MDUs account for a time equal to the output period, and outputting the modified sets of MDUs as part of the output stream.

公开(公告)号：AU2011200446B2

公开(公告)日：2012-04-12

申请号：AU2011200446

申请日：2011-02-03

Applicant: QUALCOMM INC

Inventor： RAVEENDRAN VIJAYALAKSHMI R ,  NAGARAJ THADI ,  CHEN AN MEI ,  SILBERGER AMNON ,  SHI FANG ,  SETHI SUMEET SINGH ,  WALKER GORDON KENT ,  BENNETT CHRISTOPHER JOHN ,  LOUKAS JR SERAFIM S ,  ORR BRIAN WILLIAM ,  SWAZEY SCOTT T ,  BRACKMAN DAVID ,  LIU FANG ,  SAMPATHKUMAR RAMKUMAR

IPC: H04N7/24 ,  H04N19/89 ,  H04N19/895 ,  H04N19/94

Abstract: Techniques for video encoding and decoding channel switch frames (CSF) to enable acquisition and re/synchronization of the video stream while preserving compression efficiency is provided. Systems 5 and methods to process multimedia data enabling channel switching are presented. The systems generate a CSF with one or more network adaptation layer (NAL) units as a random access point (RAP) frame. Back-to-back frames are transmitted which include the CSF and a non-RAP frame, each having the same frame ID number. DECODE BITSTREAM WITH PICTURES SF DETECTED. DECODE ACCORDING TO I-SLICES OR NAL UNIT PROTOCOL ICTUR-ES OF CH. 1010 BEFORE CSF IN OUTPUT YES ORDER? *Z DROP PICTURES ICTURES OF CH. +0N AFTER CSF IN OUTPUT ORDER? SET PICTURE BEFORE CSF AS NON-REFERENCE FRAME

公开(公告)号：WO2008057819A3

公开(公告)日：2008-08-07

申请号：PCT/US2007082809

申请日：2007-10-29

Applicant: QUALCOMM INC ,  LOUKAS JR SERAFIM S ,  TIAN TAO ,  RAVEENDRAN VIJAYALAKSHMI R

Inventor： LOUKAS JR SERAFIM S ,  TIAN TAO ,  RAVEENDRAN VIJAYALAKSHMI R

IPC: H04N7/36

CPC classification number: H04N19/42 ,  H04N19/119 ,  H04N19/146 ,  H04N19/147 ,  H04N19/176 ,  H04N19/50 ,  H04N19/51 ,  H04N19/53 ,  H04N19/57 ,  H04N19/573 ,  H04N19/61 ,  H04N19/65

Abstract: Aspects include systems and methods of improving processing in an encoder in a multimedia transmission system. Multimedia data may include one or more of motion video, audio, still images, or any other suitable type of audio-visual data. Aspects include an apparatus and method of encoding video data. For example, an apparatus and method of reduced reference frame search in video encoding is disclosed.

Abstract translation: 各方面包括改进多媒体传输系统中的编码器中的处理的系统和方法。 多媒体数据可以包括运动视频，音频，静止图像或任何其他合适类型的视听数据中的一个或多个。 各方面包括编码视频数据的设备和方法。 例如，公开了一种在视频编码中减少参考帧搜索的设备和方法。