Thomson Licensing

Xiuping Lu

John H Li

Hang Liu

Zhenyu Wu

Ramkumar Perumanam

Mingquan Wu

Saurabh Mathur

Ishan Mandrekar

Ishan Uday Mandrekar

A method comprising: receiving a scalable video coding (SVC) encoded video data from a source of digital video data, the SVC-encoded video data carrying a video content, the SVC-encoded video data including a network abstraction layer (NAL) extension header, a first layer for the video content, and a second layer for the video content, the first layer including first video data utilized to retrieve the video content in basic quality from the SVC-encoded video data, the second layer including second video data utilized along with the first video data to retrieve the video content in enhanced quality from the SVC-encoded video data; parsing the NAL extension header to identify the first and second video data; assigning a higher priority to the first video data for retransmission relative to the second video data; caching the first and second video data with the assigned priority in a buffer memory; monitoring a digital data network to collect first network transport conditions, the digital data network being connected in signal communication with a receiver, the digital data network involving first and second data transport protocols, the first protocol being less reliable than the second protocol; receiving a retransmission request transmitted on the second protocol from the receiver, the retransmission request including data indicating second network transport conditions of the digital data network determined at the receiver, the second network transport conditions including at least one of an end-to-end packet loss rate, an available bandwidth of the digital data network, and a round-trip delay; and determining whether to recover at least one of the first and second video data from the buffer memory and transmit the recovered video data to the receiver on the second protocol via the digital data network in accordance with the assigned priority in view of the first and second network transport conditions in response to the retransmission request.

Method and apparatus for retransmission decision making

Described herein are a method and apparatus including calculating an aggregate peak total traffic demand for all overlapping access points in an interference range, comparing the aggregate peak total traffic demand to a threshold, rejecting a requested new quality of service traffic stream responsive to results of the comparison, calculating a peak total traffic demand for each overlapping access point in the interference range if the requested new quality of service traffic stream is admissible responsive to results of the comparison, comparing the peak total traffic demand for each overlapping access point in the interference range, if the requested new quality of service traffic stream is admissible, to the threshold and one of accepting the requested new quality of service traffic stream and rejecting the requested new quality of service traffic stream responsive to results of the second comparison.

Method for adding a new quality of service traffic stream in a multiple wireless network environment

Methods for concealing Scalable Video Coding (SVC) decoding errors. Lost pictures in the target layer are replaced with up-sampled pictures from a lower layer, such as the base layer. In multiloop decoding applications, lost pictures in the target layer are replaced with corresponding up-sampled pictures from the lower layer. Subsequent target layer pictures in the same Group of Pictures (GOP) are either replaced with corresponding upsampled pictures from the lower layer, or they are decoded with up-sampled pictures from the lower layer used as reference pictures. For single-loop decoding, the bit stream of each layer is buffered, for each GOP, and inspected for errors. If an error is detected in the target layer, the pictures of the highest level layer without an error are decoded and up-sampled and used as the output pictures for the current GOP.

Methods for error concealment due to enhancement layer packet loss in scalable video coding (SVC) decoding

An apparatus encodes a video signal for providing a scalable video coded (SVC) signal comprising a base layer video coded signal and an enhancement layer video coded signal, wherein the base layer video coded signal has more random access points, e.g., Instantaneous Decoder Refresh (IDR) slices, than the enhancement layer and in those access units where the enhancement layer has an IDR slice, the base layer has a non-IDR slice. Transmission of the SVC occurs in packet form using the Real-time Transport Protocol (RTP) such that non-random access point slices are conveyed in Simple Time Aggregation Packets (STAP), each Simple Time Aggregation Packet comprising a Payload Content Scalability Information (PACSI) Network Abstraction Layer (NAL) Unit.

Growing community of inventors

Hillsborough, NJ, United States of America

Xiuping Lu