Signal converter, output amplifying device, audio apparatus, and transmitting and receiving system
AssigneeSony Corporation
InventorsKohei Asada, Tetsunori Itabashi
Life of this patent
Estimating the term…
Abstract
Four speakers are matrix-connected to each other and a conversion circuit for converting audio signals of four channels into pulse width modulation signals of four channels that are time-divided so as to be complementary to matrix connection are provided. Four class-D output amplifiers receive the corresponding pulse width modulation signals output from the conversion circuit and outputs from the output amplifiers are supplied to the speakers.
Claims15
A signal converter for performing conversion processing for converting input signals of p×q channels into pulse width modulation signals of p+q channels, comprising:
- means for obtaining output difference signals of p×q channels by subtraction processing between each of the pulse width modulation signals of p channels and each of the pulse width modulation signals of q channels from among the pulse width modulation signals, wherein the output difference signals correspond to the input signals of p×q channels.
An output amplifying device comprising:
- a conversion circuit for performing conversion processing for converting audio signals of p×q channels into pulse width modulation signals of p+q channels;
- and
- p+q output amplifiers to which the corresponding pulse width modulation signals of p+q channels output from the conversion circuit are supplied, wherein
- outputs from the p output amplifiers and outputs from the q output amplifiers, from among the p+q output amplifiers, are differentially supplied to corresponding p×q speakers.
An audio apparatus comprising:
- p×q speakers;
- a conversion circuit for performing conversion processing for converting audio signals of p×q channels into pulse modulation signals of p+q channels;
- and
- p+q output amplifiers to which the corresponding pulse width modulation signals of p+q channels output from the conversion circuit are supplied, wherein
- outputs from the p output amplifiers and outputs from the q output amplifiers, from among the p+q output amplifiers, are differentially supplied to the corresponding p×q speakers.
A transmitting and receiving system comprising:
- a transmitting apparatus;
- and
- a receiving apparatus, wherein
- the transmitting apparatus includes:
- a signal conversion unit for performing conversion processing for converting input signals of p×q channels into pulse width modulation signals of p+q channels;
- and
- a transmitting unit for transmitting the pulse width modulation signals of p+q channels obtained by the signal conversion unit;
- and
- the receiving apparatus includes:
- a receiving unit for receiving the transmitted pulse width modulation signals of p+q channels;
- and
- a subtraction processing unit for performing subtraction processing between each of the pulse width modulation signals of p channels and each of the pulse width modulation signals of q channels, from among the pulse width modulation signals received at the receiving unit, and for obtaining output difference signals of p×q channels.
Dependencies are inferred from the claim text.