| 摘要 |
FIELD: physics, image processing. ^ SUBSTANCE: invention is related to coder/decoder of image digital signal. Image coder is suggested, which comprises the following components: unit of predicted image generation, which generates predicted image in compliance with combination of prediction modes, which indicate method of predicted image generation; unit of decision-making relative to prediction mode, which assesses efficiency of prediction of predicted image produced from unit of predicted image generation, to make decision in respect to previously identified prediction mode; and coding unit, which exposes output signal of decision-making unit versus prediction mode to coding with alternating length of word. Unit of decision-making versus prediction mode makes decision, on the basis of previously identified control signal, which out of common prediction mode and separate prediction mode is used for corresponding colour components, which create input image signal, and multiplexes information about control signal into bitstream, multiplexes, when common prediction mode is used, information of common prediction mode into bitstream and multiplexes, when common prediction mode is not used, information of prediction mode for each colour component into bitstream. ^ EFFECT: improved optimality of moving image signal coding. ^ 63 cl, 86 dwg |
