Tfi Digital Media Limited

Hong Kong Applied Science and Technology Research Institute Company, Limited

Other

Hong Kong Applied Science and Technology Research

Institute Company Limited

Chi Keung Fong

Yiu Fai Yuen

Hon Wah Wong

Hok Kwan Cheung

Hon Tung Luk

Sam Tak Wu Kwong

Yin Sze

Wai-Kuen Cham

Shiqi Wang

Mingliang Zhou

Ho Ting Lee

Wing Chuen Cheng

Lu Wang

Yan Huo

King Ngi Ngan

Ka Man Cheng

Jie Dong

Hoi Ming Wong

Andy Chang

Kong Wai Lam

Wei Gao

Xuekai Wei

Wai Kuen Cham

Thomas H Y Pun

Ka Hei Lai

A method for jockey and horse recognition and tracking. The method includes receiving input images or a sequence of images obtained from horse racing videos or video streams; extracting features from the images by computational methods; locating jockey and horse positions of a target horse in the images by the computational methods; deciding to accept or reject the computed jockey and horse positions according to an acceptance function; and producing the final jockey and horse positions and their associated information by an error correction algorithm.

Method and system for jockey and horse recognition and tracking

The present invention provides a method and a device for facilitating a single touch-and-drag operation for a user to communicate his/her intention and make selection during a transaction flow in a robust and intuitive way. It can not only prevent erroneous selection triggered by any inadvertent or accidental touch but also provide option for the user to withdraw selection which is made unintentionally.

Secured operation with optional cancellation on touch-sensitive devices

A method for video coding with coding parameter reuse is provided as follows. A first video encoding process is executed with respect to a first video source for generating a first video stream by a first video encoder. First coding parameters are exported during the first video encoding process by the first video encoder. The first coding parameters are processed to generate second coding parameters by a parameter processor. A second video encoding process is executed with respect to a second video source for generating a second video stream by a second video encoder. The first and second video sources have different dynamic ranges from each other, and the second coding parameters are introduced into the second video encoding process.

Method for complexity reduction in video coding by coding parameters reuse

A method for video coding with global rate-distortion optimization-based rate control (RC) is provided. By using this video coding method, an RC scheme for High dynamic range (HDR) in High Efficiency Video Coding (HEVC) is provided. Briefly, considering the characteristics of HDR image content, a rate-distortion (R-D) model based on HDR-Visual Difference Predictor (VDP)-2 for performance optimization is provided. In the optimization process, the &#x3bb; is directly utilized rather than the bit rate to obtain the globally optimal solution. Finally, the model parameter estimation method is used to reduce errors. The video coding method of the present invention is verified that bit rate reduction on average can be achieved.

Method based on global rate-distortion optimization for rate control in video coding

A method for distributed video transcoding consists of segmentation process, transcoding processand combining process. The said segmentation process consists of time division based segmentation, spatial division based segmentationand hybrid segmentation. The source media is segmented into a number of media segments. These segments are distributed to different processing units. Each processing units consists of source reception unit, segmentation unit, transcoding unit, combining unitand finally result storage unitto achieve parallel conversion throughout the process and combined to produce a single transcoded result. The present invention relates to converting an audio-video source media from one format to another within a short duration of time.

Method for distributed video transcoding

A method based on CTU level rate-distortion optimization for rate control in video coding which can effectively improve the perceptual rate-distortion performance and coding efficiency is provided. Firstly, a perceptual rate-distortion model is established using a divisive normalization framework, which characterizes the relationship between local visual quality and coding bits. Subsequently, the established perceptual rate-distortion model is applied to overall distortion optimization which is transformed into a global optimization problem and solved with convex optimization algorithms to obtain optimal CTU level coding bit allocation.

Method based on coding tree unit level rate-distortion optimization for rate control in video coding

A machine learning based initial quantization parameter (QP) prediction method, which can effectively optimize RC performance A machine learning framework for initial QP prediction is proposed, where learning labels are built with the criterion of maximizing rate-distortion (RC) performance, which is proved to be much more effective than the QP determination method with the only consideration on sum of the absolute transformed difference (SATD) complexity. Instead of target bits per pixel for intra frame, target bits per pixel for remaining frames is used as sample data to avoid empirically setting intra frame bit allocation, thus improve the prediction accuracy as the real-time updated remaining bits can better reflect the real-time requirements on the level of QPs. In addition, a clipping and decision approach based on the previous initial QP and the target bits per pixel for all remaining frames is proposed, which can help fast QP adaption and quality smoothness.

Method for initial quantization parameter optimization in video coding

A method and apparatus for converting a standard dynamic range (SDR) video to a high dynamic range (HDR) video. The conversion is adaptive and takes both spatial and temporal information of a current frame and previous frames into consideration such that the majority of pixels falls into the most sensitive regions of human eyes in the target dynamic range, while at the same time, the continuity of luminance is maintained in temporal domain to prevent flickering.

Method and apparatus for converting low dynamic range video to high dynamic range video

An intelligent method and system for expanding and enhancing the color content of video or image to a wider color gamut to make the displayed video or image more pleasing while certain important and sensitive colors such as skin colors are preserved to avoid the perception of visually unnatural image or video artifacts. With the implementation of such method and system, the merits of the wide color gamut display can be fully utilized to provide videos and images of high visual quality.

Method and system for expanding and enhancing color gamut of a digital image

The LLMICT transform matrices are orthogonal, hence their inverses are their transpose. The LLMICT transform matrices are integer matrices, which can be implemented with high precision eliminating the drift error in video coding. The fast algorithms for the LLMICT transform are found, thus allowing a lower requirement on computation hardware. The LLMICT is also found to have high transform coding gain due to its similarity to the DCT.

Adaptive block-size transform using LLMICT

The invention relates to adjusting the quantization parameter in digital video coding. A shift value (QP Shift) is used to adjust the quantization parameter. The shift value is determined in a determining step. The video nature is determined and compared with a threshold in a comparing stepto adjust the shift value adaptively according to the frame type in an adjusting step. The shift value shifts the quantization parameter in a shifting step

Method and apparatus for adaptive quantization in digital video coding

The invention is used in video coding. Systems, apparatuses and methods for processing an order-16 integer transform from an order-8 transform are provided. The order-16 transform method involves expanding an order-8 transform by generating an order-16 integer matrix and a scaling matrix.

Growing community of inventors

Hong Kong, China

Chi Keung Fong