Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2006-04-11
2006-04-11
Wong, Allen (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240000, C375S240010, C375S240110, C375S240120
Reexamination Certificate
active
07027512
ABSTRACT:
In video coding techniques, in order to improve a coding efficiency and reduce a computational complexity sharply by mixing a temporal scalability and a spatial scalability, a spatio-temporal hybrid scalable video coding method using subband decomposition in accordance with the present invention includes classifying an input picture sequence into a picture of a low frame frequency BL (base layer) and a picture of a high frame frequency EL (enhancement layer) by sampling the sequence according to a time axis; decomposing the pictures on the BL and the EL into four subbands (LL, LH, HL, HH), coding the low frequency element subband (LL) at the spatial scalability BL having a low spatial resolution and coding the rest subbands (LH, HL, HH) at the EL having a high spatial resolution; decoding coding data of the temporal scalability BL in order to get a picture having a low temporal resolution and decoding coding data of the temporal scalability BL and the temporal scalability EL together in order to get a picture having a high temporal resolution; and decoding the subband (LL) of the spatial scalability BL in order to get a picture having a low spatial resolution and decoding the low frequency element subband (LL) and the high frequency element subbands (LH, HL, HH) together in order to get a picture having a high spatial resolution.
REFERENCES:
patent: 6148026 (2000-11-01), Puri et al.
patent: 6529636 (2003-03-01), Aono et al.
Lee Hong Degerman Kang & Schmadeka
LG Electronics Inc.
Wong Allen
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