PROBLEM TO BE SOLVED: To provide an audio amplifier control device for a vehicle capable of improving power efficiency of a vehicle power source as much as possible by suppressing distortion as much as possible while following an abrupt change in an input signal as much as possible.SOLUTION: A control circuit allows a sound signal that is inputted to be subjected to an absolute value processing (S4), and performs a filter process and an off-set addition process (S5). According to the process signal and a kind of external or internal audio signal source, a voltage value of the battery power supply voltage is subjected to change control (S11). The control circuit makes a delay only by a delay time Tdelay that is specified according to a power source control process time, for outputting a sound signal that is accumulated in a delay buffer (S13).
【課題】入力信号の急峻な変化に極力追従できるようにしつつ歪を極力抑制できるようにして車両用電源の電力効率を極力高めることができるようにした車両用オーディオアンプ制御装置を提供する。【解決手段】制御回路は、入力された音信号を絶対値処理し(S4)、フィルタ処理及びオフセット加算処理し(S5)、この処理信号及び外部又は内部オーディオ信号源の種類に応じて、バッテリ電源電圧の電圧値を変更制御する(S11)。制御回路は、電源制御処理時間に応じて定められる遅延時間Tdelayだけ遅延してディレイバッファに蓄積された音信号を出力する(S13)。【選択図】図2
AUDIO AMPLIFIER CONTROL DEVICE FOR VEHICLE
車両用オーディオアンプ制御装置
02.07.2015
Patent
Elektronische Ressource
Japanisch
Vehicle audio control method, vehicle audio device and vehicle
Europäisches Patentamt | 2021
|Kraftfahrwesen | 1997
|British Library Conference Proceedings | 1997
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