摘要:
A sound effect circuit and processing method are disclosed. An input audio signal is input to a digital sound effect unit, an output signal is generated and output with a sound effect in accordance with an effect amount of a certain value from the input audio signal using the digital sound effect unit, the input audio signal is also input to a silence state detection unit, a silence detect signal is generated and output when detecting that the current state of the input audio signal is a silence state using the silence state detection unit, the output signal is input to a sound effect amount control unit, and an output audio signal is output using the sound effect amount control unit, wherein the sound effect amount control unit changes the effect amount to be smaller than the certain value when the silence detect signal is generated.
摘要:
A sound effect circuit and processing method are disclosed. An input audio signal is input to a digital sound effect unit, an output signal is generated and output with a sound effect in accordance with an effect amount of a certain value from the input audio signal using the digital sound effect unit, the input audio signal is also input to a silence state detection unit, a silence detect signal is generated and output when detecting that the current state of the input audio signal is a silence state using the silence state detection unit, the output signal is input to a sound effect amount control unit, and an output audio signal is output using the sound effect amount control unit, wherein the sound effect amount control unit changes the effect amount to be smaller than the certain value when the silence detect signal is generated.
摘要:
A signal processing device includes a first amplifier, a converter, a signal processor, a controller, and a second amplifier. The first amplifier amplifies a level of an externally input analog audio signal with a first gain whose value is variable. The converter converts the analog audio signal amplified by the first amplifier into a digital audio signal. The signal processor that performs tone control signal processing on the digital audio signal. The controller detects a level of the digital audio signal before the signal processing and controls the value of the first gain in accordance with the detected level. The second amplifier detects a level of the digital audio signal after the signal processing and amplifies the digital audio signal after the signal processing with a second gain determined in accordance with the detected level and the first gain whose value has been controlled by the controller.
摘要:
A signal processing device includes a first amplifier, a converter, a signal processor, a controller, and a second amplifier. The first amplifier amplifies a level of an externally input analog audio signal with a first gain whose value is variable. The converter converts the analog audio signal amplified by the first amplifier into a digital audio signal. The signal processor that performs tone control signal processing on the digital audio signal. The controller detects a level of the digital audio signal before the signal processing and controls the value of the first gain in accordance with the detected level. The second amplifier detects a level of the digital audio signal after the signal processing and amplifies the digital audio signal after the signal processing with a second gain determined in accordance with the detected level and the first gain whose value has been controlled by the controller.
摘要:
In a signal processing apparatus, a high frequency level detecting unit detects a level of a high frequency component adjusted with a first adjusting unit, and a first control unit controls a first gain of the adjusting unit according to the level of the high frequency component thus detected. Further, a low frequency level detecting unit detects a level of a low frequency component adjusted with a second adjusting unit. A second control unit controls a second gain according to the level of the high frequency component and the level of the low frequency component thus adjusted, so that a difference between the level of the high frequency component adjusted with the first adjusting unit and the level of the low frequency component adjusted with the second adjusting unit becomes smaller than a specific level determined in advance.
摘要:
This method is applied to a dual-use jack of an electronic device. Either a headphone plug or a line output plug is inserted into the dual-use jack. The method determines the type of a plug connected to the dual-use jack when the plug is inserted into the dual-use jack. The determination is made based on a load resistance of the plug connected to the jack. The method includes feeding an electric current through the load resistance in a first direction. The method compares a voltage across the load resistance to a reference voltage and determines the type of the plug in use. The method also includes feeding an electric current through the load resistance in a second direction. This electric current can reduce or eliminate a pop-noise when the plug type is determined. The second direction is different from the first direction.
摘要:
An apparatus for performing processing of an input acoustic signal to be reproduced by a loudspeaker, which generates a harmonic of a low pitch sound component equal to or lower than a predetermined low cutoff frequency, and generates a harmonic synthesized acoustic signal synthesizing the input signal with the harmonic. The apparatus generates an output acoustic signal which cuts off, from the harmonic synthesized acoustic signal, a low pitch sound component equal to or lower than the low cutoff frequency and a high pitch sound component equal to or higher than the high cutoff frequency. The apparatus sets a low and high cutoff frequencies in accordance with an output characteristic of a loudspeaker.
摘要:
In a signal processing apparatus, a high frequency level detecting unit detects a level of a high frequency component adjusted with a first adjusting unit, and a first control unit controls a first gain of the adjusting unit according to the level of the high frequency component thus detected. Further, a low frequency level detecting unit detects a level of a low frequency component adjusted with a second adjusting unit. A second control unit controls a second gain according to the level of the high frequency component and the level of the low frequency component thus adjusted, so that a difference between the level of the high frequency component adjusted with the first adjusting unit and the level of the low frequency component adjusted with the second adjusting unit becomes smaller than a specific level determined in advance.
摘要:
A signal processing device includes a non-inverting amplifier, an inverting amplifier, a converter, and a controller. The non-inverting amplifier amplifies a level of an analog sound signal input from outside with a first gain whose value is variable. The inverting amplifier amplifies a level of the analog sound signal amplified by the non-inverting amplifier with a second gain whose value is variable. The converter converts the analog sound signal amplified by the inverting amplifier to a digital sound signal. The controller detects a level of the digital sound signal converted by the converter and, in accordance with the detected level of the digital sound signal converted by the converter, controls the first gain and the second gain such that a level of the analog sound signal input to the converter is at a pre-specified level.
摘要:
This method is applied to a dual-use jack of an electronic device. Either a headphone plug or a line output plug is inserted into the dual-use jack. The method determines the type of a plug connected to the dual-use jack when the plug is inserted into the dual-use jack. The determination is made based on a load resistance of the plug connected to the jack. The method includes feeding an electric current through the load resistance in a first direction. The method compares a voltage across the load resistance to a reference voltage and determines the type of the plug in use. The method also includes feeding an electric current through the load resistance in a second direction. This electric current can reduce or eliminate a pop-noise when the plug type is determined. The second direction is different from the first direction.