Image data decoding method and apparatus comparing decode and di

Details Image data decoding method and apparatus comparing decode and di Image data decoding method and apparatus comparing decode and di

1997-03-21

1999-08-24

Chin, Tommy P.

Television

Image signal processing circuitry specific to television

With details of static storage device

348716, 348419, 348420, H04N 964

Patent

active

059431024

ABSTRACT:
An image data decoding and displaying apparatus is equipped with a decode map set for storing decoded data for every frame into an empty areas in a memory. This set contains a plurality of maps each describing a memory area for a frame. A map is changed by a unidirectional counter for every start of a decode operation in frames. A display map set is also provided with a bidirectional counter. Normally, these two counters are incremented every time a frame is decoded and displayed, respectively, so the same maps are referred to from decode operation and display operation. In the display operation, bidirectional counter is decremented by one if data is not decoded in time for display, so that a map for an immediately preceding picture is referred to. In such a case, the previous picture is displayed twice in place of the current picture. Display transition from the current picture to the previous one is performed smoothly changing maps consistently for these pictures.

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