H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/26 (2006.01)
Patent
CA 2710337
This disclosure recognizes and exploits the fact that some of the filter coefficients defined at the encoder may possess symmetry relative to other filter coefficients. Accordingly, this disclosure describes techniques in which a first set of the filter coefficients are used to predictively encode a second set of the filter coefficients, thereby exploiting any symmetry between filter coefficients. Rather than communicate all of the filter coefficients to the decoding device, the encoding device may communicate the first set of filter coefficients and difference values associated with the second set of filter coefficients. Using this information, the decoder may be able to reconstruct all of the filter coefficients. In some cases, if exact symmetry is imposed, the need to send the difference values may be eliminated and the decoder may be able to derive the second set of filter coefficients from the first set of filter coefficients.
L'invention admet et exploite le fait que certains des coefficients de filtrage définis au niveau du codeur peuvent présenter une symétrie par rapport à d'autres coefficients de filtrage. L'invention concerne donc des techniques dans lesquelles un premier ensemble des coefficients de filtrage est utilisé pour coder de manière prédictive un second ensemble des coefficients de filtrage, exploitant ainsi une symétrie entre des coefficients de filtrage. Plutôt que de communiquer tous les coefficients de filtrage au décodeur, le codeur peut communiquer le premier ensemble de coefficients de filtrage et des valeurs différentielles associées au second ensemble de coefficients de filtrage. Cette information permet au décodeur de reconstituer tous les coefficients de filtrage. Dans certains cas, l'imposition d'une symétrie exacte rend superflue la nécessité d'envoyer les valeurs différentielles, et le décodeur peut calculer le second ensemble de coefficients de filtrage à partir du premier ensemble de coefficients de filtrage.
Karczewicz Marta
Ye Yan
Qualcomm Incorporated
Smart & Biggar
LandOfFree
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