System for very efficiently coding by performing interblock and intrablock normalization

A highly efficient coding system for converting electrical input digital image signals to efficiently coded electrical output signals, comprising:

• a blocking means for dividing electrical input digital image signals representing sampled values into a plurality of blocks and outputting first electrical output signals representing the plurality of blocks;
• an orthogonal transformation means for receiving the first electrical output signals of said blocking means corresponding to the blocks and for generating an electrical mean component signal representing a mean component of a result of an orthogonal transformation of the first electrical output signals and an electrical variation component signal representing a variation component of the result of the orthogonal transformation of the first electrical output signals;
• and
• a first normalizing means for receiving the electrical mean component signal and the electrical variation component signal and for generating second electrical output signals representing results of an interblock normalization of the electrical mean component signal and the electrical variation component signal, wherein said first normalizing means includes a vector quantization means for receiving the electrical mean component signal and the electrical variation component signal and for generating an electrical normalizing information signal representing a quantized representative value, which is a minimum value of the mean components represented by the electrical mean component signal, and a quantized variation value, which is a larger one of a maximum value of the variation components represented by the variation component signal and a difference between a maximum value and the minimum value of the mean components.

A system converting an electrical input digital image signal including image data representing an input image to an efficiently encoded electrical signal having reduced redundancy capable of transmission over a limited bandwidth communication channel and of storage in a limited storage, comprising:

• means for receiving electrical input digital image signals including image data representing an input image, and
• converting means for converting said electrical input digital image signals to electrical output signals by reducing redundancy of image data in said electrical input image signals,
• said converting means including:
• a blocking means for dividing said electrical input digital image signals including said image data into a plurality of blocks and outputting first electrical output signals representing the plurality of blocks;
• an orthogonal transformation means for receiving the first electrical output signals of said blocking means representing the blocks and performing an orthogonal transformation of the first electrical output signals, said orthogonal transformation means including:
• means for obtaining a mean component of the result of said orthogonal transformation and generating an electrical mean component signal representing said mean component, and
• means for obtaining a variation component of the result of said orthogonal transformation and generating an electrical variation component signal representing said variation component;
• a first normalizing means connected to receive the electrical mean component signal and the electrical variation component signal for performing an interblock normalization of the electrical mean component signal and the electrical variation component signal and for generating second electrical output signals representing results of said interblock normalization;
• a second normalizing means connected to receive the second electrical output signals for performing a normalization of variation components of the second electrical output signals of said first normalizing means in each of the blocks and for providing an electrical output signal representing a result of said normalization of variation components;
• and
• means for receiving said electrical output signal from said second normalizing means and for generating third electrical output signals representing a quantized result of said normalization of variation components.

A system for converting an electrical input digital image signal including image data representing an input image to an efficiently encoded electrical signal having reduced redundancy capable of transmission over a limited bandwidth communication channel and of storage in a limited storage, comprising:

• means for receiving electrical input digital image signals including image data representing an input image, and
• converting means for converting said electrical input digital image signals to electrical output signals by reducing redundancy of image data in said electrical input digital image signals,
• said converting means including:
• a blocking means for dividing said electrical input digital image signals including sampled values of said image data into a plurality of blocks and outputting first electrical output signals representing the plurality of blocks;
• an orthogonal transformation means for receiving the first electrical output signals of said blocking means representing the blocks and performing an orthogonal transformation of the first electrical output signals, said orthogonal transformation means including:
• means for obtaining a mean component of the result of said orthogonal transformation and generating an electrical mean component signal representing said mean component, and
• means for obtaining a variation component of the result of said orthogonal transformation and generating an electrical variation component signal representing said variation component;
• and
• a first normalizing means connected to receive the electrical mean component signal and the electrical variation component signal for performing an interblock normalization of the mean component signal and the electrical variation component signal and for generating second electrical output signals representing results of said interblock normalization;
• said first normalizing means including a vector quantization means for receiving the electrical mean component signal and the electrical variation component signal and for generating an electrical normalizing information signal representing a quantized representative value obtained by quantization of an original representative value, which is a minimum value of the mean components represented by the electrical mean component signal, and a quantized variation value, which is a larger one of a maximum value of the variation components represented by the variation component signal and a difference between a maximum value and the minimum value of the mean components.