INTEGRATED VOICE/AUDIO ENCODING/DECODING DEVICE AND METHOD WHEREBY THE OVERLAP REGION OF A WINDOW IS ADJUSTED BASED ON THE TRANSITION INTERVAL
First Claim
Patent Images
1. A Unified Speech and Audio Codec (USAC), comprising:
- a transition detector to detect a first transition from an input signal;
a first encoder to encode the input signal and to detect a second transition from a result of the encoding;
a transition determination unit to compare the first transition and the second transition and to determine a final transition;
a second encoder to core-encode the input signal by adjusting a length of an overlap area of a window based on the determined transition; and
a bitstream formatter to generate a bitstream comprising the core-encoded input signal and the final transition.
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Abstract
A Unified Speech and Audio Codec (USAC) for adjusting an overlap area of a window based on a transition is provided. To increase an encoding efficiency, encoding may be performed by overlapping relatively long windows. Additionally, when a transition is generated between frames, an overlap area of a window may be reduced based on the transition, thereby preventing a noise from occurring due to the transition.
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Citations
20 Claims
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1. A Unified Speech and Audio Codec (USAC), comprising:
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a transition detector to detect a first transition from an input signal; a first encoder to encode the input signal and to detect a second transition from a result of the encoding; a transition determination unit to compare the first transition and the second transition and to determine a final transition; a second encoder to core-encode the input signal by adjusting a length of an overlap area of a window based on the determined transition; and a bitstream formatter to generate a bitstream comprising the core-encoded input signal and the final transition. - View Dependent Claims (2, 3, 4, 5)
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6. A Unified Speech and Audio Codec (USAC), comprising:
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a first encoder to encode an input signal and to detect a transition from a result of the encoding; a second encoder to core-encode the input signal by adjusting a length of an overlap area of a window based on the detected transition; and a bitstream formatter to generate a bitstream comprising the core-encoded input signal. - View Dependent Claims (7, 8, 9)
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10. A Unified Speech and Audio Codec (USAC), comprising:
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a bitstream parser to parse a bitstream and to extract a transition; and a decoder to core-decode an input signal by adjusting a length of an overlap area of a window based on the transition. - View Dependent Claims (11, 12, 13)
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14. A Unified Speech and Audio Codec (USAC), comprising:
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a bitstream parser to parse an input signal from a bitstream; a first decoder to decode the input signal and to detect a transition from a result of the decoding; and a second decoder to core-decode the input signal by adjusting a length of an overlap area of a window based on the detected transition. - View Dependent Claims (15, 16)
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17. A method performed by a Unified Speech and Audio Codec (USAC), the method comprising:
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detecting a first transition from an input signal; encoding the input signal and detecting a second transition from a result of the encoding; comparing the first transition and the second transition and determining a final transition; core-encoding the input signal by adjusting a length of an overlap area of a window based on the determined transition; and generating a bitstream comprising the core-encoded input signal and the final transition.
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18. A method performed by a Unified Speech and Audio Codec (USAC), the method comprising:
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encoding an input signal and detecting a transition from a result of the encoding; core-encoding the input signal by adjusting a length of an overlap area of a window based on the detected transition; and generating a bitstream comprising the core-encoded input signal.
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19. A method performed by a Unified Speech and Audio Codec (USAC), the method comprising:
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parsing a bitstream and extracting a transition; and core-decoding an input signal by adjusting a length of an overlap area of a window based on the transition.
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20. A method performed by a Unified Speech and Audio Codec (USAC), the method comprising:
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parsing an input signal from a bitstream; decoding the input signal and detecting a transition from a result of the decoding; and core-decoding the input signal by adjusting a length of an overlap area of a window based on the detected transition.
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Specification