Quantization unit setting apparatus, quantization unit setting method, coding apparatus, coding method, and information record medium
US6657576B2 · kind B2 · utility
1Cited by
10References
24Claims
0Family size
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Key dates
| Filing date | Dec 28, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A quantizer scale setting apparatus for setting a quantizer scale used when a digital information signal Sd is quantized has an adder 12 for making a precalculation of a quantization error occurring when the digital information signal Sd is quantized using a plurality of quantizer scales for each of the quantizer scales, and an error control section 10 for setting the quantizer scale used for quantizing the digital information signal Sd from among the plurality of quantizer scales based on the quantization errors whose precalculation is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.