METHOD AND APPARATUS FOR PROCESSING AUDIO SIGNALS AT LOW COMPLEXITY
First Claim
Patent Images
1. A spectrum encoding method comprising:
- determining a number of unit magnitude pulses for factorial pulse coding based on a number of allocated bits in frequency band units for a spectrum; and
performing factorial pulse coding in the frequency band units for the spectrum by using the determined number of unit magnitude pulses.
1 Assignment
0 Petitions
Accused Products
Abstract
An audio encoding apparatus is provided that includes a transform unit to transform an audio signal in the time domain into an audio spectrum in the frequency domain; a bit allocation unit to determine the number of allocated bits by using spectral energy in predetermined frequency band units for the audio spectrum; and an encoding unit to determine the number of unit magnitude pulses for factorial pulse coding based on the number of allocated bits for the audio spectrum and to perform factorial pulse coding in the frequency band units for the audio spectrum by using the determined number of unit magnitude pulses.
14 Citations
22 Claims
-
1. A spectrum encoding method comprising:
-
determining a number of unit magnitude pulses for factorial pulse coding based on a number of allocated bits in frequency band units for a spectrum; and performing factorial pulse coding in the frequency band units for the spectrum by using the determined number of unit magnitude pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21)
-
-
10. An audio encoding apparatus comprising:
-
a transform unit to transform an audio signal in a time domain into an audio spectrum in a frequency domain; a bit allocation unit to determine a number of allocated bits by using spectral energy in predetermined frequency band units for the audio spectrum; and an encoding unit to determine a number of unit magnitude pulses for factorial pulse coding based on the number of allocated bits for the audio spectrum and to perform factorial pulse coding in the frequency band units for the audio spectrum by using the determined number of unit magnitude pulses.
-
-
11. A spectrum decoding method comprising:
-
determining a number of unit magnitude pulses for factorial pulse coding based on a number of allocated bits in frequency band units for a spectrum; and performing factorial pulse decoding in the frequency band units for the spectrum by using the determined number of unit magnitude pulses. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 22)
-
-
20. An audio decoding apparatus comprising:
-
a bit allocation unit to determine a number of allocated bits by using spectral energy in predetermined frequency band units for an audio spectrum included in a bitstream; a decoding unit to determine a number of unit magnitude pulses for factorial pulse decoding based on the number of allocated bits in frequency band units for the audio spectrum and to perform factorial pulse decoding in the frequency band units for the audio spectrum by using the determined number of unit magnitude pulses; and an inverse transform unit to transform the audio spectrum decoded by the decoding unit into an audio signal in a time domain.
-
Specification