Apparatus for coding a moving-picture signal
August 22, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesApparatus for band compression processing of a picture signal Method for transmitting a high-resolution image over a narrow-band communication channel Method and device of coding a digital video signal for reproduction of pictures with a high quality even upon occurrence of a drastical change between the pictures Encoder capable of faithfully and adaptively encoding a moving image Method and apparatus for encoding transmitting and receiving image by pulse code modulation Video encoding apparatus including movement compensation Method of coding video signals Patent #: 4894713 InventorsAssigneeApplicationNo. 397207 filed on 08/22/1989US Classes:375/240.03QuantizationExaminersPrimary: Peng, John K.Attorney, Agent or FirmForeign Patent References
International ClassesH04N 007/18H04N 007/12 Foreign Application Priority Data1988-08-22 JPAbstractAn apparatus for coding a moving-picture signal comprises a first memory temporarily memorizing an input picture signal of one frame. A block of the picture signal, which corresponds to a central portion of the frame, is firstly read out from the first memory and then other blocks of the picture signal are sequentially read out from the first memory in a predetermined order. Each of the blocks of the picture signal has a predetermined number of adjacent pixels. A transform device transforms each block of the picture signal read out from the first memory into transmission information. A second memory stores the transmission information and has a capacity which adaptively varies with a position of the block relative to the frame. A quantizer adaptively quantizes an output from the transform device in accordance with a quantity of the transmission information stored in the second memory and with the position of the block relative to the frame.Other References
| |
