Sony Corporation

Hideyuki Narita

Masatoshi Takashima

Daisuke Hiranaka

Motoki Kato

Koji Obata

Yoshiyuki Ito

Nobuhiro Igi

Yoshihiro Ishida

Keisuke Aoki

Hirofumi Morimoto

Haruyoshi Murayama

A data transmission method and a data transmission system not requiring a large delay unit for multiplexing and composition and capable of reducing the hardware scale, wherein when transmitting data among multiple points from a plurality of terminals arranged in a network, when the data at multiple points are transmitted to the terminals, in the network, identical packets are added different time stamps in accordance with the transmission delays, whereby the data shifted in accordance with the transmission delays are transmitted.

Data transmission method and data transmission system

A data transmission method able to maintain the quality of a transmitted image substantially same as that of one's own image and an apparatus using the method and a data transmission system, transmitting image data accommodated in a frame of a preset frame during communication between terminals, comprising capturing an image including a target image to be transmitted, making adjustments so that the target image to be transmitted from the obtained image substantially fully fills the image frame, and compressing and transmitting the adjusted image data in the image frame.

Data transmission method, apparatus using same, and data transmission system

A video codec () is provided in which a frame sync (FS) in base-band video data is delayed a predetermined time. A processor () is provided to make interrupt in a timing that is based on the delayed frame sync and make settings for input/output processing with respect to input/output modules (and). The processor () makes interrupt in a timing which is based on any of the delayed frame sync, video clock (V. Clk) and system clock (Sys. Clk) to control encoding or decoding start timing of a codec module (). Thus, base-band video data can be encoded and decoded in a steady input/output timing.

Video encoder and/or decoder

An image processing system comprising a decoder and an encoder . The decoder comprises a section for decoding a bit stream to generate image data, generating coding parameters for each layer and generating an error flag indicating whether the coding parameters can be effectively used. The encoder comprises a control section , an MB-parameter calculating section , an encoding section and a variable-length encoding section . The section determines, from the error flag, whether or not the coding parameters can be effectively used or not. The section calculates coding parameters when the coding parameters generated by the section are invalid. The sections and encodes the image data by using the coding parameters generated by the section when these parameters are valid, and by using the coding parameters calculated by the section when the coding parameters generated by the section are invalid.

Decoding apparatus, decoding method, encoding apparatus, encoding method, image processing system, and image processing method

A control circuit specifies a first search area by using a motion vector found in units of macroblocks between a plurality of frames located previous to first frame, specifies a second search area by using a simplified motion vector indicating the motion of an image between the first frame, the second frame, and a frame located in time between the first frame and the second frame, and designates a search area by switching the first search area and the second search area suitably.

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Kanagawa, Japan

Hideyuki Narita