US RE046,777 E1
Quantization for hybrid video codingGeneral
US RE046,777 E1
Quantization for hybrid video coding
Tech Center:
3900 Reexam/Abandonments
Examiner:
Ovidio Escalante
Art Unit:
3992 Central Reexamination Unit
Agent:
Inventors:
Hans-Georg Musmann; Matthias Narroschke
Assignee:
Priority:
03/13/07
Filed:
03/10/08
Granted:
04/03/18
Expiration:
02/28/22
Abstract
Method for coding a video signal using hybrid coding, comprising: reducing temporal redundancy by block based motion compensated prediction in order to establish a prediction error signal; performing quantization on samples of the prediction error signal or on coefficients resulting from a transformation of the prediction error signal into the frequency domain to obtain quantized values, representing quantized samples or quantized coefficients respectively; calculating a quantization efficiency for the quantized values; calculating a zero efficiency for a quantization, when the quantized values are set to zero; selecting the higher efficiency; and maintaining the quantized values or setting quantized values to zero, for further proceeding, depending on the selected efficiency.