Image information signal transmission apparatus

An image information signal transmission apparatus comprising:

• (A) blocking means for receiving an image information signal in which one frame is constituted by a plurality of sample data and for dividing the input image information signal into a plurality of blocks each consisting of a predetermined number of sample data;
• (B) reference value data forming means for forming at least two types of reference value data associated with a dynamic range of sample data of each block in units of blocks formed by said blocking means;
• (C) first coding means for coding the sample data of each block by using the reference value data formed by said reference value data forming means and forming a plurality of first coded data in units of blocks;
• (D) second coding means for vector-quantizing the plurality of first coded data formed by said first coding means in units of blocks and forming second coded data in units of blocks;
• (E) control means for controlling a second coded data forming operation of said second coding means in accordance with a state of each block formed by said blocking means;
• and
• (F) transmission data forming means for forming transmission data by using as a transmission unit the reference data formed by said reference value data forming means in units of blocks and the second coded data formed by said second coding means in units of blocks.