-
公开(公告)号：CA2674641A1
公开(公告)日：2008-07-31
申请号：CA2674641
申请日：2008-01-22
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , LEUNG NIKOLAI KONRAD NEPOMUCENO
Abstract: One technique for implementing error control in response to a video data error comprises receiving an indication of a video data error from a video d ecoder, determining whether the video data error occurred on a reverse link of a wireless network between a video encoder and a network device, and appl ying error control in response to the video data error if the video data err or did not occur on the reverse link. For example, the indication of the vid eo data error may include a first sequence number (SN) of a packet comprisin g lost data, and determining whether the video data error occurred on the re verse link may include comparing first SN with a second SN of a packet assoc iated with a most recent RL error.
-
公开(公告)号：ES2820766T3
公开(公告)日：2021-04-22
申请号：ES06839497
申请日：2006-10-20
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , LOTT CHRISTOPHER GERARD , TINNAKORNSRISUPHAP PEERAPOL , GUPTA VIKRAM
IPC: H04N21/2662 , H04N19/89 , H04N19/895 , H04N21/61 , H04N21/647 , H04N21/6583
Abstract: Un procedimiento que comprende: codificar datos de vídeo mediante un dispositivo codificador; formar un paquete de protocolo de Internet (IP) con los datos de vídeo codificados, comprendiendo el paquete macrobloques (MB) de datos de vídeo y pasando información de los macrobloques desde el codificador a una capa de protocolo de transporte en tiempo real (RTP); transmitir los paquetes a través de un canal inalámbrico a una red de acceso; en una capa de control de acceso al medio (MAC) del dispositivo codificador, recibir un acuse de recibo negativo (NAK) de la red de acceso; determinar si el NAK recibido está asociado con el paquete que contiene datos de vídeo y si el NAK recibido está asociado con el paquete que contiene datos de vídeo, informar a un módulo de protocolo de enlace de radio (RLP) del NAK recibido, determinar en el módulo RLP qué cola de RLP contiene un paquete que experimentó un error en la transmisión; y realizar el control de errores, en el que realizar el control de errores comprende mantener un mapa entre paquetes de protocolo de Internet (IP) y macrobloques de datos de vídeo; después de determinar qué paquete IP contiene datos que se perdieron en la transmisión, usar el mapa para convertir el paquete IP en macrobloques de una trama de vídeo para determinar qué macrobloques se perdieron en la transmisión; y realizar el control de errores para los macrobloques que se perdieron en la transmisión; y en el que realizar el control de errores comprende al menos uno de (a) restringir un rango de búsqueda de estimación de movimiento para que una parte dañada no se use como predicción, (b) intracodificar macrobloques coubicados y macrobloques vecinos, y (c) usar diferentes tramas de referencia para macrobloques coubicados.
-
公开(公告)号：AT494735T
公开(公告)日：2011-01-15
申请号：AT05855322
申请日：2005-12-22
Applicant: QUALCOMM INC
Inventor： YE YAN , DANE GOKCE , LEE YEN-CHI , TSAI MING-CHANG , FENG NIEN-CHUNG , NI KARL
Abstract: Methods and systems for processing video data are described. A set of candidate motion vectors is selected from motion vectors associated with macroblocks in a first frame of video data and from motion vectors associated with macroblocks in a second frame of the video data. A statistical measure of the set is determined. The statistical measure defines a motion vector for a macroblock of interest in the second frame.
-
公开(公告)号：CA2674641C
公开(公告)日：2014-04-22
申请号：CA2674641
申请日：2008-01-22
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , LEUNG NIKOLAI KONRAD NEPOMUCENO
Abstract: One technique for implementing error control in response to a video data error comprises receiving an indication of a video data error from a video decoder, determining whether the video data error occurred on a reverse link of a wireless network between a video encoder and a network device, and applying error control in response to the video data error if the video data error did not occur on the reverse link. For example, the indication of the video data error may include a first sequence number (SN) of a packet comprising lost data, and determining whether the video data error occurred on the reverse link may include comparing first SN with a second SN of a packet associated with a most recent RL error.
-
公开(公告)号：BRPI0711790A2
公开(公告)日：2011-12-27
申请号：BRPI0711790
申请日：2007-05-30
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , LOTT CHRISTOPHER GERARD , TINNAKORNSRISUPHAP PEERAPOL , GUPTA VIKRAM
Abstract: The disclosure relates to video rate adaptation techniques that may use information from a medium access control (MAC) layer and radio link protocol (RLP) layer. The techniques may greatly reduce video delay by adjusting video encoding rate. For real-time video telephony (VT) applications, these techniques may provide graceful quality degradation and improve user experience, especially when the channel conditions degrade.
-
Patent Agency Ranking
公开(公告)号：AU2006304947B2
公开(公告)日：2010-08-19
申请号：AU2006304947
申请日：2006-10-20
Applicant: QUALCOMM INC
Inventor： LOTT CHRISTOPHER GERARD , TINNAKORNSRISUPHAP PEERAPOL , LEE YEN-CHI , GUPTA VIKRAM
IPC: H04N7/24 , H04N19/89 , H04N19/895
Abstract: The disclosure relates to reverse link lower layer assisted video error control. A method may encode video data, form a packet with the encoded video data, and transmit the packet across a wireless channel to an access network. A medium access control (MAC) layer may receive a negative acknowledgement (NAK) from the access network. The method may determine whether the received NAK is associated with a packet that contains video data. If the received NAK is associated with a packet that contains video data, the method may perform error control.
-
公开(公告)号：DE602006013798D1
公开(公告)日：2010-06-02
申请号：DE602006013798
申请日：2006-03-08
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , EL-MALEH KHALED HELMI , TSAI MING-CHANG
Abstract: The disclosure is directed to techniques for region-of-interest (ROI) processing for video telephone (VT) applications. According to the disclosed techniques, a recipient device defines ROI information for video information transmitted by a sender device, i.e., far-end video information. The recipient device transmits the ROI information to the sender device. Using the ROI information transmitted by the recipient device, the sender device applies preferential encoding to an ROI within a video scene. In this manner, the recipient device is able to remotely control ROI encoding of far-end video information by the sender device.
-
公开(公告)号：ES2338455T3
公开(公告)日：2010-05-07
申请号：ES06737619
申请日：2006-03-08
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , EL-MALEH KHALED HELMI , TSAI MING-CHANG
Abstract: Un procedimiento para el procesamiento de regiones de interés en un sistema de videotelefonía que comprende al menos dos dispositivos (12, 14) de comunicación de vídeo conectados mediante un canal de transmisión, comprendiendo cada dispositivo de comunicación de vídeo un codificador-decodificador de vídeo, comprendiendo el procedimiento: transmitir vídeo de extremo cercano codificado desde un dispositivo local a un dispositivo remoto; recibir, en el dispositivo local, vídeo de extremo lejano codificado por el dispositivo remoto; recibir, en el dispositivo local, información desde el dispositivo remoto que especifica una región de interés (ROI) dentro del vídeo de extremo cercano codificado transmitido al dispositivo remoto, en el que la información que especifica la ROI está incrustada en el vídeo de extremo lejano codificado; y codificar, en el dispositivo local, el vídeo de extremo cercano basándose en la ROI para mejorar una calidad de imagen de la ROI respecto a zonas no ROI del vídeo de extremo cercano.
-
公开(公告)号：AT456904T
公开(公告)日：2010-02-15
申请号：AT06737619
申请日：2006-03-08
Applicant: QUALCOMM INC
Inventor： LEE YEN-CHI , EL-MALEH KHALED HELMI , TSAI MING-CHANG
Abstract: The disclosure is directed to techniques for region-of-interest (ROI) processing for video telephony (VT) applications. According to the disclosed techniques, a recipient device defines ROI information for video information transmitted by a sender device, i.e., far-end video information. The recipient device transmits the ROI information to the sender device. Using the ROI information transmitted by the recipient device, the sender device applies preferential encoding to an ROI within a video scene. ROI extraction may be applied to process a user description of a region of interest (ROI) to generate information specifying the ROI based on the description. The user description may be textual, graphical, or speech-based. An extraction module applies appropriate processing to generated the ROI information from the user description. The extraction module may locally reside with a video communication device, or reside in a distinct intermediate server configured for ROI extraction.
-
公开(公告)号：NO20082301A
公开(公告)日：2008-07-09
申请号：NO20082301
申请日：2008-05-20
Applicant: QUALCOMM INC
Inventor： LOTT CHRISTOPHER GERARD , TINNAKORNSRISUPHAP PEERAPOL , LEE YEN-CHI , GUPTA VIKRAM
IPC: H04N7/24 , H04N7/64 , H04N19/895
CPC classification number: H04N21/6181 , H04N19/895 , H04N21/2662 , H04N21/6131 , H04N21/6473 , H04N21/64776 , H04N21/6583
Abstract: The disclosure relates to reverse link lower layer assisted video error control. A method may encode video data, form a packet with the encoded video data, and transmit the packet across a wireless channel to an access network. A medium access control (MAC) layer may receive a negative acknowledgement (NAK) from the access network. The method may determine whether the received NAK is associated with a packet that contains video data. If the received NAK is associated with a packet that contains video data, the method may perform error control.
-
-
-
-
-
-
-
-
-
Search Results
28
records
(took 0.021 seconds)
