JP2853824B
PURPOSE:To evade the propagation of a code error, maintain a relatively short update period, and to reduce quantization distortion by utilizing the time continuity of parameters when spectrum information and power are encoded with a small amount of information. CONSTITUTION:A multiplier 1 multiplies...
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| creator | MIKI SATOSHI MORYA TAKEHIRO KATAOKA AKITOSHI MANO KAZUNORI OOMURO NAKA |
| description | PURPOSE:To evade the propagation of a code error, maintain a relatively short update period, and to reduce quantization distortion by utilizing the time continuity of parameters when spectrum information and power are encoded with a small amount of information. CONSTITUTION:A multiplier 1 multiplies a past code vector Vj which is one frame before by a coefficient (1-g) and supplies the result to one input terminal of an adder 2. A code (g) is the constant of the rate of a weighted mean. Further, a multiplier 3 multiplies a current regenerated vector Wk by the constant (g) of the rate of the weighted mean and supplies the result to the other input terminal of the adder 2. The adder 2 adds the vectors supplied to the respective input terminals and supplies the result as a quantized value Yn to a distortion calculator 4. The distortion calculator 4 is supplied with an ideal parameter Xn, selects and supplies a regenerated vector Wk, minimizing the distortion between the quantized value Yn and input parameter Xn, to the multiplier, and also sends its number. |
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CONSTITUTION:A multiplier 1 multiplies a past code vector Vj which is one frame before by a coefficient (1-g) and supplies the result to one input terminal of an adder 2. A code (g) is the constant of the rate of a weighted mean. Further, a multiplier 3 multiplies a current regenerated vector Wk by the constant (g) of the rate of the weighted mean and supplies the result to the other input terminal of the adder 2. The adder 2 adds the vectors supplied to the respective input terminals and supplies the result as a quantized value Yn to a distortion calculator 4. 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| subjects | ACOUSTICS BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MUSICAL INSTRUMENTS PHYSICS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TRANSMISSION |
| title | JP2853824B |
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