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.

A system for improving resolution of a voltage command of a low voltage DC-DC converter is provided. The system includes a voltage command signal generator that generates a first voltage command signal having a magnitude of a first specific range for a first voltage command of the low voltage DC-DC converter and a scale part that varies the first voltage command signal generated by the voltage command signal generator based on a preset scale ratio. An offset part sets a minimum value of a variable range of the first voltage command signal of the low voltage DC-DC converter. A resolution increasing part reduces the variable range of the first voltage command signal of the low voltage DC-DC converter by adding an output of the scale part and an output of the offset part.

A system for improving resolution of a voltage command of a low voltage DC-DC converter is provided. The system includes a voltage command signal generator that generates a first voltage command signal having a magnitude of a first specific range for a first voltage command of the low voltage DC-DC converter and a scale part that varies the first voltage command signal generated by the voltage command signal generator based on a preset scale ratio. An offset part sets a minimum value of a variable range of the first voltage command signal of the low voltage DC-DC converter. A resolution increasing part reduces the variable range of the first voltage command signal of the low voltage DC-DC converter by adding an output of the scale part and an output of the offset part.

A circuit includes a splitter to extract L bits from each of a plurality of N-bit transmissions on a data bus, a decoder to generate output data comprising N-L bits of each N-bit transmission, and a delay circuit to apply the L bits for a previous transmission to control the inversion of a current transmission at the decoder.

A circuit includes a splitter to extract L bits from each of a plurality of N-bit transmissions on a data bus, a decoder to generate output data comprising N-L bits of each N-bit transmission, and a delay circuit to apply the L bits for a previous transmission to control the inversion of a current transmission at the decoder.

A PAM-4 communication process divides a full burst of raw data into two half bursts, extracts a bit from each half burst and communicating the extracted bit on a DBI line, and encodes the remaining bits of the half burst to avoid maximum transitions between PAM-4 symbols on a data line.

A PAM-4 communication process divides a full burst of raw data into two half bursts, extracts a bit from each half burst and communicating the extracted bit on a DBI line, and encodes the remaining bits of the half burst to avoid maximum transitions between PAM-4 symbols on a data line.

Audio content in a single-bit audio stream can be reproduced at a transducer by mapping the single-bit audio stream to symbols in a multi-bit audio stream. Volume control may be implemented, in part, in the digital domain and, in part, in the analog domain. In the digital domain, when converting the single-bit audio stream to a plurality of symbols, the plurality of symbols is selected based, at least in part, on audio content of the single-bit audio stream and a desired volume level. In the analog domain, when converting an analog current signal output from a current-steering DAC processing the plurality of symbols to an analog voltage signal, an analog gain value may be selected based, at least in part, on the desired volume level.

A PAM-4 communication process divides a full burst of raw data into two half bursts, extracts a bit from each half burst and communicating the extracted bit on a DBI line, and encodes the remaining bits of the half burst to avoid maximum transitions between PAM-4 symbols on a data line.

A PAM-4 communication process divides a full burst of raw data into two half bursts, extracts a bit from each half burst and communicating the extracted bit on a DBI line, and encodes the remaining bits of the half burst to avoid maximum transitions between PAM-4 symbols on a data line.