| US 7,339,506 B2 | ||
| Variable length coding method and variable length decoding method | ||
| Shinya Kadono, Nishinomiya (Japan); Satoshi Kondo, Yawata (Japan); Makoto Hagai, Moriguchi (Japan); and Kiyofumi Abe, Kadoma (Japan) | ||
| Assigned to Matsushita Electric Industrial Co., Ltd., Osaka (Japan) | ||
| Filed on Oct. 06, 2006, as Appl. No. 11/543,860. | ||
| Application 11/543860 is a division of application No. 11/110922, filed on Apr. 21, 2005, granted, now 7,161,508. | ||
| Application 11/110922 is a division of application No. 10/480038, granted, now 6,967,600, previously published as PCT/JP02/12230, filed on Nov. 22, 2002. | ||
| Claims priority of application No. 2001-358197 (JP), filed on Nov. 22, 2001; and application No. 2002-099227 (JP), filed on Apr. 01, 2002. | ||
| Prior Publication US 2007/0030183 A1, Feb. 08, 2007 | ||
| Int. Cl. H03M 7/40 (2006.01) | ||
| U.S. Cl. 341—67 [341/65; 375/240.22; 375/240.23; 382/245; 382/246; 382/248; 382/250] | 3 Claims |
| 1. A method for coding quantized coefficients of a block image, the method comprising:
scanning a two-dimensional array of quantized coefficients into scanned quantized coefficients, wherein said scanning is performed
from a low frequency component toward a high frequency component;
converting the scanned quantized coefficients into a run value and a level value, the run value indicating the number of continuous
quantized coefficients, each having a zero value, and the level value indicating a value of a quantized coefficient having
a non-zero value;
coding the run value; and
coding the level value;
wherein the coding of the run value is performed, from a high frequency component toward a low frequency component, in accordance
with information that represents a total number of uncoded quantized coefficients which have not been coded.
|