Patent ReferencesVideo telephone General-purpose electronic telephone station set Video telephone Conversational video phone Video-optimized modulator-demodulator with adjacent modulating amplitudes matched to adjacent pixel gray values Patent #: 4739413 Inventors
AssigneeApplicationNo. 285816 filed on 12/16/1988US Classes:348/14.14, Still frame (e.g., freeze frame)348/14.01, TWO-WAY VIDEO AND VOICE COMMUNICATION (E.G., VIDEOPHONE)358/453Image portion selectionExaminersPrimary: Ng, Jin F.Assistant: Chan, Wing F. Attorney, Agent or FirmForeign Patent References
International ClassesH04M 011/00H04N 007/14 Foreign Application Priority Data1987-12-17 JPAbstractA still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information from a television camera or the like, during a telephone call, includes a picture memory for storing a plurality of pages of picture information consisting of a camera-taken picture memory portion which rewrites still picture information input therein delivered from the television camera at intervals of a predetermined period, a self-prepared picture memory portion which stores desired still picture information until arrival of a rewrite instruction, and an incoming picture memory portion which sequentially rewrites still picture information therein upon receipt of still picture information when its storage regions are filled up, memory region input information for setting up regions for the self-prepared picture memory portion and the incoming picture memory portion within the picture memory, and picture memory control circuit for controlling still picture information input to and output from the picture memory based on the memory region information, wherein the picture memory is capable of storing a plurality pages of still picture information and allocating memory regions to the self-prepared picture memory portion and the incoming picture memory portion in various ways. | |