Abstract
The authors discuss compression and coding ICs for still images based on the DCT (discrete cosine transform) using a new algorithm for bit-rate control. The compression and coding method used in these ICs conforms to the JPEG (Joint Photographic Expert Group) standard. These ICs have been developed for a digital still camera system using memory cards as the recording medium, and they have a bit-rate control function to guarantee the number of images recorded on a card. The functional specifications and composition of these ICs, as well as the structure of the encoder IC, and details of the algorithm used for bit-rate control are considered. >
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