Agency for Science, Technology and Research

Xiaokang Yang

Susanto Rahardja

Zhengguo Li

Xiao Lin

Weisi Lin

Keng Pang Lim

Susu Yao

Feng Pan

Zhongkang Lu

Ee Ping Ong

A scalable coder having a grid motion estimation and compensation module (), a motion compensation temporal filtering module (), a scalable coding module (), a discrete transformation module (), and a packetization module (). The grid-motion estimation and compensation module () outputs a scalable motion vector from the source video data, supplied resolution and bit rate parameters. The motion compensation temporal filtering module () generates, from the source video data and the scalable motion vector, a residual image corresponding to the difference between the present and previous image frames. The scalable coding module () is coupled to receive and encode the scalable motion vector. The discrete transformation module () is configured to receive and domain transform the supplied video to a sequence of coefficients. The packetization module is coupled to the scalable coding module () and the discrete transformation module (), and is operable to combine the encoded scalable motion vector and the sequence of coefficients into a packet.

Scalable video coding with grid motion estimation and compensation

A method of measuring a quality of a test video stream, the method comprising measuring a content richness fidelity feature of the test video stream based on occurrences of color values in image frames of the test video stream; measuring a block-fidelity feature of the test video stream based on distortion at block-boundaries in the image frames of the test video stream; measuring a distortion-invisibility feature of the test video stream based on distortion at pixels of the image frames of the test video stream; and determining a quality rating for the test video stream based on the content richness fidelity feature, the block-fidelity feature and the distortion-invisibility feature measured.

Method and system for video quality measurements

Growing community of inventors

Singapore, Singapore

Xiaokang Yang