High-efficiency image encoding system
专利汇可以提供High-efficiency image encoding system专利检索，专利查询，专利分析的服务。并且PURPOSE: To reduce deterioration in picture quality due to the absence of a high frequency component, etc., by enabling encoding operation which follows up the local statistic of an image signal.
CONSTITUTION: An image block inputted from a signal input terminal 1 is supplied to an orthogonal transformation circuit 2 to perform two-dimensional discrete cosine transformation. Only a low-order transformation coefficient is used and a vector quantizing circuit 3 refers to a code book storage circuit 4 to obtain a representative vector by quantization. The code book storage circuit 4 is stored with vectors based upon only the low-order transformation coefficient as a component and a vector having minimum distortion from an input vector is selected among the stored vectors by the vector quantizing circuit 3 to generate a representative vector, which is outputted to a subtracting circuit 5. The subtracting circuit 5 finds the difference between the input and output vectors of the vector quantizing circuit 3 and this difference, i.e. residual component is quantized by a scalar quantizing circuit 6 and outputted from a scalar quantized signal output terminal 8.
COPYRIGHT: (C)1987,JPO&Japio，下面是High-efficiency image encoding system专利的具体信息内容。
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