Encoder, decoder, and their methods

Details Encoder, decoder, and their methods Encoder, decoder, and their methods

2011-07-12

2011-07-12

Odom, Curtis B (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

C375S340000, C704S200000, C704S203000, C704S230000

Reexamination Certificate

active

07978771

ABSTRACT:
An encoder generating a decoded signal with an improved quality by scalable encoding by canceling the characteristic inherent to the encoder and causing degradation of quality of the decoded signal. In the encoder, a first encoding section (102) encodes the input signal after down sampling, a first decoding section (103) decodes first encoded information outputted from the first encoding section (102), an adjusting section (105) adjusts the first decoded signal after up sampling by convoluting the first decoded signal after up sampling and an impulse response for adjustment, an adder (107) inverses the polarity of adjusted first decoded signal and adds the first decoded signal having the inverted polarity to the input signal, a second encoding section (108) encodes the residual signal outputted from the adder (107), and a multiplexing section (109) multiplexes the first encoded information outputted from the first encoding section (102) and the second encoded information outputted from the second encoding section (108).

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