Speech coding
First Claim
1. A method for use in speech coding, said method comprising:
- pre-processing a to be encoded speech based signal such that a phase structure of said to be encoded speech based signal is approached to a phase structure which would be obtained if said to be encoded speech based signal was encoded and decoded; and
applying an encoding to said pre-processed to be encoded speech based signal.
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Accused Products
Abstract
The invention relates to a method for use in parametric speech coding. In order to enable an improved parametric coding of speech signals, the method comprises a first step of pre-processing a to be encoded speech based signal such that a phase structure of the to be encoded speech based signal is approached to a phase structure which is obtained when the to be encoded speech based signal is parametrically encoded and decoded again. Only in a second step, a parametric encoding is applied to this pre-processed to be encoded speech based signal. The invention relates equally to a corresponding device, to a corresponding coding module, to a corresponding system and to a corresponding software program product.
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Citations
32 Claims
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1. A method for use in speech coding, said method comprising:
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pre-processing a to be encoded speech based signal such that a phase structure of said to be encoded speech based signal is approached to a phase structure which would be obtained if said to be encoded speech based signal was encoded and decoded; and
applying an encoding to said pre-processed to be encoded speech based signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for performing a speech coding, said device comprising:
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a pre-processing portion adapted to pre-process a to be encoded speech based signal such that a phase structure of said to be encoded speech based signal is approached to a phase structure which would be obtained if said to be encoded speech based signal was encoded and decoded; and
a coding portion which is adapted to apply an encoding to a to be encoded speech based signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A coding module for performing a speech coding, said coding module comprising:
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a pre-processing portion adapted to pre-process a to be encoded speech based signal such that a phase structure of said to be encoded speech based signal is approached to a phase structure which would be obtained if said to be encoded speech based signal was encoded and decoded; and
a coding portion which is adapted to apply an encoding to a to be encoded speech based signal. - View Dependent Claims (18, 19, 20, 21)
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22. A system comprising at least one device for performing a speech coding, said at least one device comprising:
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a pre-processing portion adapted to pre-process a to be encoded speech based signal such that a phase structure of said to be encoded speech based signal is approached to a phase structure which would be obtained if said to be encoded speech based signal was encoded and decoded; and
a coding portion which is adapted to apply an encoding to a to be encoded speech based signal. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A software program product in which a software code for use in speech coding is stored, said software code realizing the following steps when running in a processing unit:
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pre-processing a to be encoded speech based signal such that a phase structure of said to be encoded speech based signal is approached to a phase structure which would be obtained if said to be encoded speech based signal was encoded and decoded; and
applying an encoding to said pre-processed to be encoded speech based signal. - View Dependent Claims (29, 30, 31, 32)
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Specification