To provide an audio output device with high audio quality at low price by configuring a structure such that a substantially high resolution can be obtained even when the resolution of a PWM output device is not sufficient.SOLUTION: Audio data is divided into high-order bits and low-order bits, and the high-order bits are set in a first PWM output device 21a for PWM output, and the low-order bits are set in a second PWM output device 21b for PWM output. Then, the PWM output of the first PWM output device 21a and the PWM output of the second PWM output device 21b are weighted by an attenuator 22 or the like, and then combined by a mixer 24.SELECTED DRAWING: Figure 1
【課題】PWM出力器の分解能が十分でなくても、実質的に高い分解能が得られる構成とすることで、廉価で音声品質の高い音声出力装置を提供する。【解決手段】音声データを上位ビットと下位ビットに分割し、上位ビットを第1PWM出力器21aにセットしてPWM出力させると共に、下位ビットを第2PWM出力器21bにセットしてPWM出力させる。そして、第1PWM出力器21aのPWM出力と第2PWM出力器21bのPWM出力について減衰器22などで重み付けを行ったのち、ミキサ24によって合成する。【選択図】図1
AUDIO OUTPUT DEVICE
音声出力装置
2020-09-17
Patent
Elektronische Ressource
Japanisch
IPC: | H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
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