DVD machine with karaoke OK
A DVD player and OK technology, applied in the direction of recording information storage, instruments, electro-acoustic musical instruments, etc., can solve the problems of affecting sound quality and poor sound quality, and achieve the effect of improving sound quality and eliminating noise
Active Publication Date: 2011-04-27
深圳市江元智造科技有限公司
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Problems solved by technology
The inventor has found in practice that the DVD player provided by the above-mentioned prior art will generate noise in various places in the circuit, such as: the noise of the input port 11 is amplified and output to the output port 18, which is affected by various circuit elements, or the noise of the input itself Noise, these noises affect the sound quality, the sound quality is not good
Method used
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Embodiment Construction
[0028] The embodiment of the present invention provides a DVD player with karaoke. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0029] figure 2 It is the schematic circuit diagram of the DVD player provided by the embodiment of the present invention, the DVD player includes a circuit board, and the circuit board includes: the microphone signal input port 101 is connected to the operational amplifier unit 102, and the operational amplifier unit 102 is connected to analog and digital signals Processor 103, the analog and digital signal processor 103 is connected to a dual operational amplifier 107, through which the dual operational amplifier 107 outputs a signal to the signal output port 108; The unit 102 and the dual operational amplifier 107 provide power; the power supply board 105 provid...
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The invention provides a DVD player provided with a karaoke device, which comprises a circuit board. The circuit board comprises a microphone signal input port which is connected with an operation amplification unit; the operation amplification unit is connected with a simulation and digital signal processor which is connected with a double-circuit operation amplifier; the double-circuit operation amplifier outputs signal into a signal output port; a power supply board supplies power to the operation amplification unit and the double-circuit operation amplifier through a filtering unit; the power supply board supplies power to the simulation and digital signal processor through a steady voltage filtering circuit; and a first noise reduction processing unit is connected in series between the microphone signal input port and the operation amplification unit. As the noise reduction processing unit serves to reduce noise at the part which intends to produce a great amount of noise, the purpose of improving the output sound quality of the DVD player is achieved.
Description
technical field [0001] The invention relates to a DVD player, in particular to a DVD player with karaoke. Background technique [0002] DVD machine, application is very extensive, and the DVD machine that prior art provides generally has the function of karaoke, comprises circuit board, as figure 1 As shown, the circuit board includes: the microphone signal input port 11 is connected to an operational amplifier unit 12, and the operational amplifier unit 12 is connected to an analog and digital signal processor 13, and the analog and digital signal processor 13 is connected to a dual channel Operational amplifier 17, through described double-way operational amplifier 17 output signals to signal output port 18; Power supply board 15 provides power for described operational amplification unit 12 and dual-way operational amplifier 17 by filter unit 16; Power supply board 15 passes through stabilizing The voltage filter circuit 14 provides power for the analog and digital signa...
Claims
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IPC IPC(8): G11B31/00G10H1/36
Inventor 陈鹏
Owner 深圳市江元智造科技有限公司