Methods and apparatus for information encoding and decoding based upon tonal components of plural channels
First Claim
Patent Images
1. A signal encoding method, comprising the steps of:
- converting plural-channel input signals into frequency components;
separating the frequency components into first signals made up of tonal components and second signals made up of other components;
encoding the first signals of at least two of the plural channels, the encoding being one of encoding in common the first signals of each of at least two of the plural channels and separately encoding the first signals of each of the at least two of the plural channels.
1 Assignment
0 Petitions
Accused Products
Abstract
A signal encoding method and apparatus by which a high encoding efficiency may be achieved by encoding tonal components of plural channels by exploiting channel-to-channel characteristics. The encoding of separately encoding first signals of plural channels is selectively changed over to the encoding of encoding the first signals of plural channels in common or vice versa depending on the results of detection of characteristics of the first signals of plural channels. The compression ratio may be improved if the first signals are encoded in common, while ill effects due to encoding in common may be avoided by separately encoding the first signals of plural channels.
-
Citations
14 Claims
-
1. A signal encoding method, comprising the steps of:
-
converting plural-channel input signals into frequency components; separating the frequency components into first signals made up of tonal components and second signals made up of other components; encoding the first signals of at least two of the plural channels, the encoding being one of encoding in common the first signals of each of at least two of the plural channels and separately encoding the first signals of each of the at least two of the plural channels. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A signal encoding apparatus, comprising:
-
means for converting input signals of plural channels into frequency components; signal component separating means for separating the frequency components of the plural channels into first signals made up of tonal components and second signals made up of other components; encoding means for encoding the first signals of at least two of the plural channels, the encoding being one of encoding in common the first signals of each of the at least two of the plural channels and separately encoding the first signals of each of the at least two of the plural channels. - View Dependent Claims (7, 8)
-
-
9. A signal decoding method for decoding an encoded signal, comprising the steps of:
-
decoding said first and second signals, wherein the improvement resides in! decoding encoded first signals of plural channels based upon results of a detection of characteristics of said first signals of at least two of the plural channels; and decoding channel-based encoded second signals from one channel to another, the encoded first signals and encoded second signals generated by separating frequency components of plural channels into first signals made up of tonal components and into second signals made up of other components. - View Dependent Claims (10, 11, 14)
-
-
12. A signal decoding apparatus, comprising:
-
means for decoding encoded first signals of at least two of plural channels based upon results of a detection of characteristics of said first signals; and means for decoding channel-based encoded second signals from one channel to another, the encoded first signals and encoded second signals generated by separating frequency components of plural channels into first signals made up of tonal components and into second signals made up of other components. - View Dependent Claims (13)
-
Specification