Title:
PARAMETER DECODING DEVICE, PARAMETER ENCODING DEVICE, AND PARAMETER DECODING METHOD
Document Type and Number:
WIPO Patent Application WO/2008/056775
Kind Code:
A1
Abstract:
Provided is a parameter decoding device which performs parameter compensation
process so as to suppress degradation of a main observation quality in a prediction
quantization. The parameter decoding device includes amplifiers (305-1 to
305-M) which multiply inputted quantization prediction residual vectors xn-1
to xn-M by a weighting coefficient β1 to βM.
The amplifier (306) multiplies the preceding frame decoding LSF vector yn-1
by the weighting coefficientβ-1. The amplifier (307) multiplies
the code vector xn+1 outputted from a codebook (301) by the weighting
coefficientβ0. An adder (308) calculates the total of the
vectors outputted from the amplifiers (305-1 to 305-M), the amplifier (306),
and the amplifier (307). A selector switch (309) selects the vector outputted
from the adder (308) if the frame erasure coding Bn of the current frame
indicates that "the n-th frame is an erased frame" and the frame erasure
coding Bn+1 of the next frame indicates that "the n+1-th frame
is a normal frame".
Inventors:
EHARA HIROYUKI
Application Number:
PCT/JP2007/071803
Publication Date:
May 15, 2008
Filing Date:
November 09, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
EHARA HIROYUKI
EHARA HIROYUKI
International Classes:
G10L19/005; G10L19/07; G10L19/083
Foreign References:
| JPH09120297A | 1997-05-06 | |||
| JPH06130999A | 1994-05-13 | |||
| JPH02216200A | 1990-08-29 | |||
| JP2002328700A | 2002-11-15 | |||
| JPH05113798A | 1993-05-07 | |||
| JP2002507011A | 2002-03-05 | |||
| JPH06175695A | 1994-06-24 | |||
| JPH09120497A | 1997-05-06 | |||
| JP2002328700A | 2002-11-15 |
Other References:
See also references of EP 2088588A4
Attorney, Agent or Firm:
WASHIDA, Kimihito (Shintoshicenter Bldg.24-1, Tsurumaki 1-chome,Tama-shi, Tokyo 34, JP)
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