CN202258368U

CN202258368U - Nondestructive digital audio player based on central processing unit (CPU) platform

Info

Publication number: CN202258368U
Application number: CN2011202968004U
Authority: CN
Inventors: 闫天时
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-06
Filing date: 2011-08-06
Publication date: 2012-05-30
Anticipated expiration: 2021-08-06

Abstract

The utility model discloses a nondestructive digital audio player based on a central processing unit (CPU) platform, which is formed by an audio input interface, a CPU nondestructive digital audio decoder, an audio output interface, a control circuit and a power source. A pulse-code modulation (PCM) digital audio decoder in an original WAV format and a nondestructive compressed digital audio decoder are arranged in the CPU nondestructive digital audio decoder so that the nondestructive digital audio player can play original PCM digital music files from 16bit/44.1KHz to 24bit/192KHz and nondestructive compressed music in APE, FLAC and similar formats, enable system fidelity to reach level above that of a compact disc (CD), read digital music files in a hard disk or a movable hard disk, a personal computer (PC), a flash disk and a secure digital (SD) card, and process input and output analog signals and Sony/Philips digital interface format (SPDIF) signals.

Description

Harmless digital audio-frequency player based on the CPU platform

Affiliated technical field

The utility model relates to a kind of PCM DAB Play System and lossless compress DAB Play System of WAV form, especially comprises that through hard disk portable hard drive, SD card reach the movable storage device that is fit to USB interface and play the PCM digital music of original WAV form and the digital music reproducing device of nondestructive compression type.

Background technology

Present known MP3 player can only be play the music of MP3 format, and this known player all exists following imperfection part:

(1) the MP3 player can not be play the PCM digital music of WAV form; Can not play the lossless compress music; It only limits to the MP3 of lossy compression method and the music file of similar structure thereof; Because it is relatively poor that this music file is significantly compressed tonequality, therefore can not satisfy the audition requirement of music-lover to tonequality;

(2) the MP3 data processing platform (DPP) is the 16-24 bit DSP, and data-handling capacity is limited, and the big data quantity music for lossless format is difficult to normal play.

(3) the MP3 player can not read the music file in the portable hard drive through USB; Can not read the music file in the PC PC; It can only read MP3 and the lossy compression method music file of similar form in flash disk and the SD card, because that the capacity of USB flash disk and SD card can not be done is very big, the music of therefore playing neither be too many; In order to hear the music of different-style, the user must be frequent refreshes memory contents or frequent change card and cause and use inconvenience;

Summary of the invention

For overcoming the deficiency of known technology; The utility model provides a kind of harmless digital audio-frequency player based on the CPU platform; Constitute by audio input interface, the harmless digital audio decoding device of CPU, audio output interface, control circuit and power supply; The harmless digital audio decoding device of CPU the is built-in PCM digital audio decoding device and the lossless compress digital audio decoding device of original WAV form; Thereby can play the lossless compress music (original PCM digital music and lossless compress digital music close and claim harmless music) of the original PCM digital music file of 16bit/44.1KHz to 24bit/192KHz and APE, FLAC and similar form; It can not only make the system fidelity reach the above rank of CD can also read the digital music file in hard disk or portable hard drive, PC computer, flash disk and the SD card, and can handle input and output simulating signal and SPDIF signal.

The utility model solves the technical scheme that its technical matters adopted:

Fig. 1, based on the harmless digital audio-frequency player of CPU platform by the harmless digital audio decoding device of CPU, audio input interface, audio output interface, I ²C control circuit and power supply are formed, and CPU is harmless, and digital audio decoding device input end connects audio input interface, and CPU is harmless, and digital audio decoding device output terminal connects output interface, and the control end of the harmless digital audio decoding device of CPU passes through I ²The C bus is connected to control circuit, and power supply is connected on the harmless digital audio decoding device power port of CPU.

The beneficial effect of the utility model is to utilize various memory devices to play the original PCM digital music and the lossless compress digital music of WAV form; And can read the harmless digital music signal of storing on hard disk and the portable hard drive; Outside satisfying the higher Music Appreciation demand of music-lover; It is big also to have the music storage amount, simple in structure, volume is little, cost is low, plurality of advantages such as easy to use.

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is based on the module frame chart of the harmless digital audio-frequency player of CPU platform.

Fig. 2 is based on the theory diagram of the harmless digital audio-frequency player of CPU platform.

Specific embodiment is:

Among Fig. 1, connect audio input interface based on the harmless digital audio decoding device input end of CPU of the harmless digital audio-frequency player of CPU platform, CPU is harmless, and digital audio decoding device output terminal connects output interface, and the control end of the harmless digital audio decoding device of CPU passes through I ²The C bus is connected to control circuit, and power supply is connected on the harmless digital audio decoding device power port of CPU.

Among Fig. 2; CPU is harmless, and digital audio decoding device (1) is core with CPU; And built-in PCM music demoder (1-1) and lossless compress music demoder (1-2); CPU is harmless, and digital audio decoding device (1) input end connects hard-disk interface HD (4-1), portable hard drive MHD (4-2), SD card (4-3), USB interface (4-4), fiber-coaxial interface SPDIF (2-1), analog to digital converter ADC interface (2-2), PC interface (3-2) and HDMI interface (3-1) respectively, and the harmless digital audio decoding device (1) of CPU is decoded through the PCM digital music and the lossless compress digital music file of the WAV form of above-mentioned interface readable signal source or respective storage devices storage.

Among Fig. 2, the output terminal of the harmless digital audio decoding device (1) of CPU connects the two-way output interface circuit, first via linking number analog conversion circuit DAC (6) and process (6) conversion back output ANALOG simulating signal, and the second the tunnel connects I ²S TO SPDIF (5) and the coaxial digital signal SPDIF of process (5) conversion back output optical fibre.

Among Fig. 2, the I of the harmless digital audio decoding device (1) of CPU ²The C control end passes through I ²The C bus connects control circuit IR/KEYPAD/DISPLAY (7), and control circuit (7) comprises DISPLAY such as infrared remote control receiver IR, keypress function control KEYPAD, display module, and these circuit are connected with CPU and realize mutual control.

Harmless digital music file can be stored in hard disk HD, portable hard drive MHD, SD card and the USB memory device; CPU is harmless, and digital audio decoding device (1) can read the audio file data of having stored and the output of decoding through the corresponding interface of the said equipment; And portable hard drive MHD and PC PC also can carry out audio playback and interactive operation through USB interface; But the harmless digital audio decoding device (1) of CPU is not limited to read the digital audio file of above-mentioned listed memory device, stores, and the high-definition digital audio file of any type of memory device, stores makes acoustic product broadcast tonequality produce the mode that improves via the harmless digital audio decoding device decoding of CPU can both reach this effect.

Claims

1. the harmless digital audio-frequency player based on the CPU platform can't harm digital audio decoding device, audio input interface, audio output interface, I by CPU ²C control circuit and power supply are formed, and it is characterized in that: CPU is harmless, and digital audio decoding device input end connects audio input interface, and CPU is harmless, and digital audio decoding device output terminal connects output interface, and the control end of the harmless digital audio decoding device of CPU passes through I ²The C bus is connected to control circuit, and power supply is connected on the harmless digital audio decoding device power port of CPU.

2. the harmless digital audio-frequency player based on the CPU platform according to claim 1, its characteristic also be the harmless digital audio decoding device of CPU built-in respectively PCM original figure music demoder and lossless compress digital music demoder.

3. the harmless digital audio-frequency player based on the CPU platform according to claim 1, its characteristic are that also input interface disposes USB interface, SD card, hard-disk interface, analog signal interface, SPDIF interface, PC interface, HDMI interface whole or in part.

4. the harmless digital audio-frequency player based on the CPU platform according to claim 1; Its characteristic is that also harmless digital audio file can be stored in hard disk HD or portable hard drive MHD, SD card and the USB memory device, and CPU is harmless, and the digital audio decoding device can read the audio file data of having stored and the output of decoding through the corresponding interface of the said equipment.

5. the harmless digital audio-frequency player based on the CPU platform according to claim 1, its characteristic are that also control circuit is made up of remote control circuit IR, control key circuit KEYPAD and display circuit DISPLAY.