Backward Extrapolation for Video Stream Decoding Delays

The patent applies preliminary action by calculating and storing backward extrapolation periods (BEP) in advance based on picture timing information that is received later. The system pre-computes the time relationships between pictures and stores these extrapolation parameters, so that when pictures without time stamps are encountered during stream transitions, the decoding process can immediately use the pre-calculated BEP values to determine presentation timing without waiting for subsequent time stamp information, thereby reducing decoding delays.

The patent introduces an intermediary mechanism by using backward extrapolation period (BEP) calculations as a mediator between received pictures and the decoding process. When time stamp information is unavailable for certain pictures, the system uses BEP values derived from subsequently received pictures to interpolate and determine the timing information for earlier pictures. This intermediary approach allows decoding to proceed with estimated timing information rather than waiting for actual time stamps, thus reducing presentation delays while maintaining acceptable decoding accuracy.

The patent applies preliminary action by pre-calculating and storing backward extrapolation period (BEP) values based on picture timing information that becomes available later in the stream. Instead of caching all pictures indefinitely or waiting for complete time stamp information, the system pre-computes the time relationships and stores these extrapolation parameters, enabling selective processing of pictures based on their extrapolated timing information. This reduces the need to hold all pictures in memory and simplifies buffer management while maintaining decoding reliability.