Video decoder dynamic memory allocation system and method allowi

Details Video decoder dynamic memory allocation system and method allowi Video decoder dynamic memory allocation system and method allowi

1997-07-28

2000-06-06

Britton, Howard

Television

Miscellaneous

382232, 395166, H04N 400

Patent

active

060725486

ABSTRACT:
A video decoder which uses a dynamic memory allocation scheme having end-of-frame (EOF) tokens for decoder-display synchronization. The EOF tokens advantageously allow for decoding and display of variable-sized images with a fixed dynamic memory allocation architecture. In one embodiment, the video decoder includes an MPEG bitstream decoder, FIFO buffer logic, a free segment register, and a display processor. The video decoder decodes an encoded bitstream to obtain image data for storage in an external memory, and the display processor retrieves the image data for display on a fixed-size monitor. To conserve memory, the bitstream decoder only stores anchor frames as complete images in the external memory, and bi-directional images are stored in dynamically allocated memory segments. Free memory segments are determined by examination of a free segment register, and pointers to the memory segments having image data are passed to the display processor via the FIFO buffers. The display processor is unable to compensate for differences between the decoded image size and the displayed image size for image data passed using the dynamic memory allocation scheme unless some method for marking the end of decoded image fields is used. The bitstream decoder accomplishes this by writing end-of-field tokens to the FIFO buffers to delineate the image data.

REFERENCES:
patent: 5517612 (1996-05-01), Dwin et al.
patent: 5638531 (1997-06-01), Crump et al.
patent: 5717461 (1998-02-01), Hoogenboom
patent: 5781788 (1998-07-01), Woo et al.
patent: 5838380 (1998-10-01), Sun et al.
patent: 5841472 (1998-10-01), Rim et al.

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