SELECTION OF ENCODING MODES AND/OR ENCODING RATES FOR SPEECH COMPRESSION WITH CLOSED LOOP RE-DECISION
First Claim
1. In a device configurable to encode speech, a method based on closed loop re-decision comprising:
- representing a speech signal by amplitude components and phase components for a current frame and a past frame;
in a first closed loop stage, generating a first set of compressed components and a first set of uncompressed components for a current frame;
retrieving the amplitude components and the phase components from the past frame;
generating a first set of features based on the first set of compressed components, the first set of uncompressed components, the amplitude components from the past frame, and the phase components from the past frame;
checking the first set of features as part of the closed loop re-decision; and
determining a final encoding decision based on the checking.
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Accused Products
Abstract
In a device configurable to encode speech performing an closed loop re-decision may comprise representing a speech signal by amplitude components and phase components for a current frame and a past frame. In a first closed loop stage, a first set of compressed components and a first set of uncompressed components for a current frame may be generated. A first set of features may be generated by comparing current and past frame amplitude and/or phase components. In a second closed loop stage, a second set of compressed components for the current frame may be generated by compressing the first set of compressed components and compressing the first set of uncompressed components. Generation of a second set of features may be based on the second set of compressed components from the current frame and a combination of amplitude and/or phase components from the past frame.
74 Citations
47 Claims
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1. In a device configurable to encode speech, a method based on closed loop re-decision comprising:
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representing a speech signal by amplitude components and phase components for a current frame and a past frame;
in a first closed loop stage, generating a first set of compressed components and a first set of uncompressed components for a current frame;
retrieving the amplitude components and the phase components from the past frame;
generating a first set of features based on the first set of compressed components, the first set of uncompressed components, the amplitude components from the past frame, and the phase components from the past frame;
checking the first set of features as part of the closed loop re-decision; and
determining a final encoding decision based on the checking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 28, 39)
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19. A computer-readable medium comprising storing a set of instructions, wherein the set of instructions when executed by one or more processors comprises:
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means for representing a speech signal by amplitude components and phase components for a current frame and a past frame;
in a first closed loop stage, means for generating a first set of compressed components and a first set of uncompressed components for a current frame;
means for retrieving the amplitude components and the phase components from the past frame;
means for generating a first set of features based on the first set of compressed components, the first set of uncompressed components, the amplitude components from the past frame, and the phase components from the past frame;
means for checking the first set of features as part of the closed loop re-decision; and
means for determining a final encoding decision based on the checking. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 29)
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30. A device configurable to encode speech and perform a closed loop-redicision comprising:
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means for representing a speech signal by amplitude components and phase components for a current frame and a past frame;
in a first closed loop stage, means for generating a first set of compressed components and a first set of uncompressed components for a current frame;
means for retrieving the amplitude components and the phase components from the past frame;
means for generating a first set of features based on the first set of compressed components, the first set of uncompressed components, the amplitude components from the past frame, and the phase components from the past frame;
means for checking the first set of features as part of the closed loop re-decision; and
means for determining a final encoding decision based on the checking. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification