Signal processing apparatus, signal processing method, and program
AssigneeSony Corporation
InventorYoshinori Tamori
Life of this patent
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Abstract
The present technology relates to a signal processing apparatus, a signal processing method, and a program that allow an improvement in the rate of modulation of PWM signals. Pulse width modulation (PWM) is performed to convert one of a 0 or 1 represented by a bit of a pulse density modulation (PDM) signal into which an audio signal has been PDM-modulated, into a maximum-length pulse of a maximum pulse width of a PWM signal having a period equal to the period of the PDM signal, and convert the other of the 0 or 1 of the PDM signal into a minimum-length pulse of a minimum pulse width of the PWM signal at a position adjacent to the center of the period of the PWM signal. The present technology is applicable, for example, to audio reproduction systems that reproduce audio signals.
Claims7
A signal processing apparatus, comprising:
- a pulse width modulation (PWM) converter configured to perform PWM modulation to convert one of a 0 or 1 represented by a bit of a pulse density modulation (PDM) signal into which an audio signal has been PDM-modulated, into a maximum-length pulse of a maximum pulse width of a PWM signal having a period equal to a period of the PDM signal, and convert the other of the 0 or 1 of the PDM signal into a minimum-length pulse of a minimum pulse width of the PWM signal at a position adjacent to a center of the period of the PWM signal.
A signal processing method, comprising:
- performing pulse width modulation (PWM) to
- convert one of a 0 or 1 represented by a bit of a pulse density modulation (PDM) signal into which an audio signal has been PDM-modulated, into a maximum-length pulse of a maximum pulse width of a PWM signal having a period equal to a period of the PDM signal, and
- convert the other of the 0 or 1 of the PDM signal into a minimum-length pulse of a minimum pulse width of the PWM signal at a position adjacent to a center of the period of the PWM signal.
A non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed by a signal processing apparatus, cause the signal processing apparatus to execute operations, the operations comprising:
- performing pulse width modulation (PWM) to
- convert one of a 0 or 1 represented by a bit of a pulse density modulation (PDM) signal into which an audio signal has been PDM-modulated, into a maximum-length pulse of a maximum pulse width of a PWM signal having a period equal to a period of the PDM signal, and
- convert the other of the 0 or 1 of the PDM signal into a minimum-length pulse of a minimum pulse width of the PWM signal at a position adjacent to a center of the period of the PWM signal.
Dependencies are inferred from the claim text.