Speech or audio encoding of variable frequency tonal components and non-tonal components
First Claim
Patent Images
1. A method for encoding an input signal comprising the steps of:
- breaking down the input signal into frequency components;
separating the frequency components into a first signal made up of a plurality of tonal components and a second signal made up of other components, the number of the frequency components making up the tonal components being variable;
encoding said first signal; and
encoding said second signal.
0 Assignments
0 Petitions
Accused Products
Abstract
Frequency components are broken into a first signal made up of a plurality of tonal components and a second signal made up of other components. The number of the frequency components making up the tonal components is variable. Tonal signals may be encoded efficiently depending on the manner of distribution of their spectral energy to assure more efficient encoding on the whole. If the signals compression coded in this manner are recorded on a recording medium, the recording capacity may be employed effectively. Also, high-quality acoustic signals may be obtained on decoding signals reproduced from the recording medium.
-
Citations
36 Claims
-
1. A method for encoding an input signal comprising the steps of:
-
breaking down the input signal into frequency components; separating the frequency components into a first signal made up of a plurality of tonal components and a second signal made up of other components, the number of the frequency components making up the tonal components being variable; encoding said first signal; and encoding said second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An apparatus for encoding an input signal comprising:
-
means for breaking down the input signal into frequency components; means for separating the frequency components into a first signal made up of a plurality of tonal components and a second input signal made up of other components, the number of the frequency components making up the tonal components being variable; means for encoding said first signal; and means for encoding said second signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A signal recording medium on which an encoded signal is recorded, said recording medium being formed by the steps of:
-
breaking down an input signal into frequency components; separating the frequency components into a first signal made up of a plurality of tonal components and a second signal made up of other components, the number of the frequency components making up the tonal components being variable; encoding said first signal; encoding said second signal; and recording the encoded first and second signals on the recording medium. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
-
22. A signal recording medium on which encoded signals are recorded, wherein
information on plural tonal components and information on noisy components are recorded separately therein, and wherein said information on said tonal components includes information indicating the number of frequency components making up each tonal component.
-
25. A method for decoding an encoded signal comprising the steps of:
-
decoding a first signal made up of plural tonal components to generate a first decoded signal; decoding a second signal made up of noisy components to generate a second decoded signal; and combining said first and second decoded signals and inverse transforming the combined signals, or separately inverse transforming said first and second decoded signals and combining the inverse transformed signals, the combining and inverse transforming step being performed on the basis of information indicating the number of the frequency components making up each tonal component. - View Dependent Claims (26, 27, 28, 29, 30)
-
-
31. An apparatus for decoding an encoded signal comprising:
-
first decoding means for decoding a first signal made up of plural tonal components to generate a first decoded signal; second decoding means for decoding a second signal made up of noisy components to generate a second decoded signal; and combining and inverse transforming means for combining said first and second decoded signals and inverse transforming the combined signals, or separately inverse transforming said first and second decoded signals and combining the inverse transformed signals, the combining and inverse transforming means performing the combining operation on the basis of information indicating the number of the frequency components making up each tonal component. - View Dependent Claims (32, 33, 34, 35, 36)
-
Specification