METHOD AND APPARATUS FOR VIDEO BUFFER VERIFIER UNDERFLOW AND OVERFLOW CONTROL

METHOD AND APPARATUS FOR VIDEO BUFFER VERIFIER UNDERFLOW AND OVERFLOW CONTROL

A method and apparatus for Video Buffer Verifier (VBV) underflow and overflow control. A combination of picture and slice level control is used in the method and apparatus. Improved prevention of overflow and panic mode encoding is achieved by adjusting the virtual buffer-fullness which allows the q...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GOH KWONG H, LUCAS HUI Y
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:A method and apparatus for Video Buffer Verifier (VBV) underflow and overflow control. A combination of picture and slice level control is used in the method and apparatus. Improved prevention of overflow and panic mode encoding is achieved by adjusting the virtual buffer-fullness which allows the quantization-step to have an improved response to the buffer-fullness at both high and low critical levels. The use of a non-linear quantization scheme and customised quantization matrices also provide improved prevention of panic mode encoding. The slice level control also reduces the computation complexity compared to the macroblock level control.