Patent ID: 6490058
Filing Date: 2002-12-03
Classification: H04N

Abstract:
An image decoding and display device comprises:a control section for control the entire operation of said image decoding and display device; an image decoding section for inputting encoded image data transferred from outside of said image decoding and display device and for decoding said encoded image data under the control by said control section, and for generating decoded image data; a frame memory comprising banks, a memory size of each of which is one frame for storing said decoded image data, and a bank made up of a plurality of sectors and whose memory size is not less than 0.5 frame for storing said decoded image data of a frame B, a frame memory interface for inputting said decoded image data outputted from said image decoding section according to the control of said control section, for writing said decoded image data into said frame memory, and for reading said decoded image data stored in said frame memory; and a video interface for inputting said decoded image data transferred from said frame memory interface, for converting said decoded image data in format, and for outputting said decoded image data converted to outside, wherein under a fixed mapping mode by the control of said control section, said frame memory interface writes said decoded image data into predetermined sectors in said frame memory, and under a dynamic mapping mode by the control of said control section, said frame memory interface refers a sector information table that shows a use state of each of said plurality of sectors in said frame memory in order to search unused sector, and allocates said unused sector when said frame memory interface writes said decoded image data into said frame memory, and release said used sector when decoded image data are read.