Apparatus and Method for Encoding and Decoding Signal
First Claim
1. A decoding method, comprising:
- extracting a plurality of encoded signals from an input bitstream;
determining which of a plurality of decoding methods is to be used to decode each of the encoded signals;
decoding the encoded signals using the determined decoding methods;
synthesizing the decoded signals into a single signal; and
restoring an original signal by performing a post-processing operation on the single signal.
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Abstract
Encoding and decoding apparatuses and encoding and decoding methods are provided. The decoding method includes extracting a plurality of encoded signals from an input bitstream, determining which of a plurality of decoding methods is to be used to decode each of the encoded signals, decoding the encoded signals using the determined decoding methods, synthesizing the decoded signals, and restoring an original signal by performing a post-processing operation on the single signal. Accordingly, it is possible to encode signals having different characteristics at an optimum bitrate by classifying the signals into one or more classes according to the characteristics of the signals and encoding each of the signals using an encoding unit that can best serve the class where a corresponding signal belongs. In addition, it is possible to efficiently encode various signals including audio and speech signals.
51 Citations
23 Claims
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1. A decoding method, comprising:
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extracting a plurality of encoded signals from an input bitstream; determining which of a plurality of decoding methods is to be used to decode each of the encoded signals; decoding the encoded signals using the determined decoding methods; synthesizing the decoded signals into a single signal; and restoring an original signal by performing a post-processing operation on the single signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 23)
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10. A decoding apparatus, comprising:
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a bit unpacking module which extracts a plurality of encoded signals from an input bitstream; a decoder determination module which determines which of a plurality of decoding units is to be used to decode each of the encoded signals; a decoding module which comprises the decoding units and decodes the encoded signals using the determined decoding units; a synthesization module which synthesizes the decoded signals; and a post-processing module which restores an original signal by performing a post-processing operation on the single signal. - View Dependent Claims (11, 12, 13)
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14. An encoding method, comprising:
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performing a pre-processing operation on an input signal so that the input signal can be converted into a signal that can be efficiently encoded; dividing the pre-processed signal into a plurality of divided signals; determining which of a plurality of encoding methods is to be used to encode each of the divided signals based on characteristics of each of the divided signals; encoding the divided signals using the determined encoding methods; and generating a bitstream based on the encoded divided signals. - View Dependent Claims (15, 16, 17, 18)
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19. An encoding apparatus, comprising:
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a pre-processing module which performs a pre-processing operation on an input signal so that the input signal can be converted into a signal that can be efficiently encoded; a signal division module which divides the pre-processed signal into a plurality of divided signals; an encoder determination module which determines which of a plurality of encoding units is to be used to encode each of the divided signals based on characteristics of each of the divided signals; an encoding module which comprises the encoding units and encodes the divided signals using the determined encoding units; and a bit packing module which generates a bitstream based on the encoded divided signals. - View Dependent Claims (20, 21, 22)
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Specification