	US 7,495,707 B2
	Signal processing apparatus and method, recording medium, and program
Tetsujiro Kondo, Tokyo (Japan); Shizuo Chikaoka, Tokyo (Japan); and Sakon Yamamoto, Tokyo (Japan)
Assigned to Sony Corporation, Tokyo (Japan)
Appl. No. 10/483,095 PCT Filed Apr. 28, 2003, PCT No. PCT/JP03/05490 § 371(c)(1), (2), (4) Date Jan. 06, 2004, PCT Pub. No. WO03/096706, PCT Pub. Date Nov. 20, 2003.
Claims priority of application No. 2002-132819 (JP), filed on May 08, 2002.
Prior Publication US 2004/0218096 A1, Nov. 04, 2004
Int. Cl. H04N 5/46 (2006.01)

U.S. Cl. 348—555 [348/441; 348/414.1; 348/558]

17 Claims

1. A signal processing apparatus comprising:

first extracting means for extracting a first part used for classification from an input signal to which a plurality of types of signals are multiplexed;

detecting/classifying means for detecting patterns by using a plurality of methods based on the first part extracted by the first extracting means so as to classify the patterns into classes;

first storage means for storing an S/N-ratio value of each of the classes set by the detecting/classifying means;

class determining means for determining a class to be adopted from the classes set by the first detecting/classifying means based on the S/N-ratio values stored in the first storage means;

second storage means for storing a plurality of predictive coefficients;

predictive-coefficient determining means for determining a predictive coefficient corresponding to the class determined by the class determining means from the predictive coefficients stored in the second storage means;

second extracting means for extracting a second part used for prediction from the input signal; and

signal generating means for computing and generating a predetermined signal based on the second part extracted by the second extracting means and the predictive coefficient determined by the predictive-coefficient determining means.