| US 7,508,333 B2 | ||
| Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal | ||
| Junghoe Kim, Seoul (Korea, Republic of); Eunmi Oh, Seongnam-si (Korea, Republic of); and Anton Porov, Yongin-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd, Suwon-si (Korea, Republic of) | ||
| Filed on Oct. 17, 2006, as Appl. No. 11/581,331. | ||
| Claims priority of application No. 10-2006-0030167 (KR), filed on Apr. 03, 2006. | ||
| Prior Publication US 2007/0229345 A1, Oct. 04, 2007 | ||
| Int. Cl. H03M 7/26 (2006.01) | ||
| U.S. Cl. 341—200 [341/143] | 48 Claims |
| 1. A method of quantizing an input signal, the method comprising:
determining a quantization scale type indicating a scale type for quantization according to a Gaussian distribution feature
of an input signal; and
quantizing the input signal according to the determined quantization scale type and the Gaussian distribution feature
wherein the determining of the quantization scale type comprises:
determining a generalized Gaussian distribution variable at which a generalized Gaussian distribution matches a distribution
of the input signal;
determining a correlation between the number of assigned bits used to encode the input signal and a distortion rate of the
input signal by using the determined generalized Gaussian distribution variable; and
determining the quantization scale type corresponding to the distortion rate of the input signal and determining a scale factor
that is used for quantization from the determined correlation.
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