CN102915757A - Lossless digital audio player based on CPU (central processing unit) platform - Google Patents
Lossless digital audio player based on CPU (central processing unit) platform Download PDFInfo
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- CN102915757A CN102915757A CN201110232108XA CN201110232108A CN102915757A CN 102915757 A CN102915757 A CN 102915757A CN 201110232108X A CN201110232108X A CN 201110232108XA CN 201110232108 A CN201110232108 A CN 201110232108A CN 102915757 A CN102915757 A CN 102915757A
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Abstract
The invention discloses a lossless digital audio player based on a CPU (central processing unit) platform, which comprises an audio input interface, a CPU lossless digital audio decoder, an audio output interface, a control circuit and a power source, wherein the CPU lossless digital audio decoder is internally provided with a PCM (pulse code modulation) digital audio decoder and a lossless compression digital audio decoder with an original WAV format, so as to play original PCM digital music files and lossless compression music with APE, FLAC and other similar formats from 16bit/44.1 KHz to 24bit/192 KHz. The lossless digital audio player can enable the system fidelity to be up to more than a CD level, read digital music files in a hard disk or a mobile hard disk, a personal computer, a USB (universal serial bus) flash drive and a SD card, and process input/output analog signals and SPDIF (Sony/Philips digital interface format) signals.
Description
Affiliated technical field
The present invention relates to a kind of PCM digital Audio Broadcasting System and Lossless Compression digital Audio Broadcasting System of WAV form, especially comprise that by 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 Compression 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 music-lover to the audition requirement of 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 music file in the portable hard drive by USB, can not read the music file in the PC PC, it can only read MP3 in flash disk and the SD card and the lossy compression method music file of similar form, because it is very large that the capacity of USB flash disk and SD card can not be done, therefore the music of playing neither be too many, in order to hear the music of different-style, the user must refresh frequently memory contents or change card frequently and cause and use inconvenience;
Summary of the invention
For overcoming the deficiency of known technology, the invention provides a kind of harmless digital audio-frequency player based on the CPU platform, by audio input interface, CPU can't harm digital audio frequency decoder, audio output interface, control circuit and electric power generating composition, the harmless digital audio frequency decoder of CPU is built-in PCM digital audio frequency decoder and the Lossless Compression digital audio frequency decoder of original WAV form, thereby can play the original PCM digital music file of 16bit/44.1KHz to 24bit/192KHz and APE, the Lossless Compression music of FLAC and similar form (original PCM digital music and Lossless Compression digital music are collectively referred to as harmless music), it can not only make the system fidelity reach the above rank of CD can also read hard disk or portable hard drive, the PC computer, digital music file in flash disk and the SD card, and can process input and output simulating signal and SPDIF signal.
The technical solution adopted for the present invention to solve the technical problems is:
Fig. 1, based on the harmless digital audio-frequency player of CPU platform by the harmless digital audio frequency decoder of CPU, audio input interface, audio output interface, I
2C control circuit and power supply form, and CPU is harmless, and the digital audio frequency decoder input end connects audio input interface, and CPU is harmless, and the digital audio frequency decoder output terminal connects output interface, and the control end of the harmless digital audio frequency decoder of CPU passes through I
2The C bus is connected to control circuit, and power supply is connected on the harmless digital audio frequency decoder power port of CPU.
The invention has the beneficial effects as follows original PCM digital music and the Lossless Compression digital music that can utilize various memory devices to play the 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 large also to have the music storage amount, simple in structure, volume is little, cost is low, the plurality of advantages such as easy to use.
The present invention is further described below in conjunction with drawings and Examples.
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 frequency decoder input end of CPU of the harmless digital audio-frequency player of CPU platform, CPU is harmless, and the digital audio frequency decoder output terminal connects output interface, and the control end of the harmless digital audio frequency decoder of CPU passes through I
2The C bus is connected to control circuit, and power supply is connected on the harmless digital audio frequency decoder power port of CPU.
Among Fig. 2, CPU can't harm digital audio frequency decoder (1) take CPU as core, and built-in PCM music demoder (1-1) and Lossless Compression music demoder (1-2), CPU can't harm digital audio frequency decoder (1) input end and connects respectively hard-disk interface HD (4-1), portable hard drive MHD (4-2), SD card interface (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), CPU can't harm digital audio frequency decoder (1) and decode by PCM digital music and the Lossless Compression 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 that CPU can't harm digital audio frequency decoder (1) connects the two-way output interface circuit, output ANALOG simulating signal after first via linking number analog conversion circuit DAC (6) and process (6) conversion, and the second the tunnel connects I
2The coaxial digital signal SPDIF of output optical fibre after S TO SPDIF (5) and process (5) conversion.
Among Fig. 2, CPU can't harm the I of digital audio frequency decoder (1)
2The C control end passes through I
2The C bus connects control circuit IR/KEYPAD/DISPLAY (7), and control circuit (7) comprises the 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, in SD card and the USB memory device, CPU can't harm digital audio frequency decoder (1) can read the audio file data of having stored and the output of decoding by the corresponding interface of the said equipment, and portable hard drive MHD and PC PC also can be carried out audio playback and interactive operation by USB interface, but CPU can't harm digital audio frequency decoder (1) and is not limited to the digital audio file that reads above-mentioned listed memory device, stores, and the mode that the high-definition digital audio file of any type of memory device, stores makes acoustic product play tonequality generation raising via the harmless digital audio frequency decoder decoding of CPU can both reach this effect.
Claims (5)
1. the harmless digital audio-frequency player based on the CPU platform can't harm digital audio frequency decoder, audio input interface, audio output interface, I by CPU
2C control circuit and power supply form, and it is characterized in that: CPU is harmless, and the digital audio frequency decoder input end connects audio input interface, and CPU is harmless, and the digital audio frequency decoder output terminal connects output interface, and the control end of the harmless digital audio frequency decoder of CPU passes through I
2The C bus is connected to control circuit, and power supply is connected on the harmless digital audio frequency decoder power port of CPU.
2. the harmless digital audio-frequency player based on the CPU platform according to claim 1, be further characterized in that the harmless digital audio frequency decoder of CPU built-in respectively PCM original figure music demoder and Lossless Compression digital music demoder.
3. the harmless digital audio-frequency player based on the CPU platform according to claim 1 is further characterized in that input interface disposes USB interface, SD card interface, hard-disk interface, analog signal interface, SPDIF interface, PC interface, HDMI interface whole or in part.
4. according to claim 1,2,3 described harmless digital audio-frequency players based on the CPU platform, be further characterized in that harmless digital audio file can be stored in hard disk HD (comprising portable hard drive MHD), in SD card and the USB memory device, CPU is harmless, and digital audio frequency decoder can read the audio file data of having stored and the output of decoding by the corresponding interface of the said equipment, digital audio frequency decoder is not limited to the file that reads above-mentioned listed memory device, stores but CPU is harmless, the harmless digital audio file of any type of memory device, stores is decoded output and is made the mode of acoustic product broadcast tonequality generation raising can both reach this effect via the harmless digital audio frequency decoder of CPU, equally within aforesaid right requires.
5. the harmless digital audio-frequency player based on the CPU platform according to claim 1 is further characterized in that control circuit is comprised of remote control circuit IR, control key circuit KEYPAD and display circuit DISPLAY.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110232108XA CN102915757A (en) | 2011-08-06 | 2011-08-06 | Lossless digital audio player based on CPU (central processing unit) platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110232108XA CN102915757A (en) | 2011-08-06 | 2011-08-06 | Lossless digital audio player based on CPU (central processing unit) platform |
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| CN102915757A true CN102915757A (en) | 2013-02-06 |
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| CN201110232108XA Pending CN102915757A (en) | 2011-08-06 | 2011-08-06 | Lossless digital audio player based on CPU (central processing unit) platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883641A (en) * | 2014-02-28 | 2015-09-02 | 维沃移动通信有限公司 | Mobile terminal of realizing high fidelity music play |
| CN111078182A (en) * | 2019-12-12 | 2020-04-28 | 深圳市深智电科技有限公司 | Android-based music high-fidelity lossless playing system and music playing method |
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| CN101025724A (en) * | 2006-02-20 | 2007-08-29 | 创惟科技股份有限公司 | Audio media storage and play device |
| US20080101770A1 (en) * | 2003-09-04 | 2008-05-01 | Digital Networks North America, Inc. | Method and Apparatus for Remotely Controlling a Receiver According to Content and User Selection |
| CN101958139A (en) * | 2010-08-10 | 2011-01-26 | 闫天时 | High definition lossless audio playing (HDAP) system |
| CN202258368U (en) * | 2011-08-06 | 2012-05-30 | 闫天时 | Nondestructive digital audio player based on central processing unit (CPU) platform |
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2011
- 2011-08-06 CN CN201110232108XA patent/CN102915757A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20080101770A1 (en) * | 2003-09-04 | 2008-05-01 | Digital Networks North America, Inc. | Method and Apparatus for Remotely Controlling a Receiver According to Content and User Selection |
| CN101025724A (en) * | 2006-02-20 | 2007-08-29 | 创惟科技股份有限公司 | Audio media storage and play device |
| CN101958139A (en) * | 2010-08-10 | 2011-01-26 | 闫天时 | High definition lossless audio playing (HDAP) system |
| CN202258368U (en) * | 2011-08-06 | 2012-05-30 | 闫天时 | Nondestructive digital audio player based on central processing unit (CPU) platform |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104883641A (en) * | 2014-02-28 | 2015-09-02 | 维沃移动通信有限公司 | Mobile terminal of realizing high fidelity music play |
| WO2015127832A1 (en) * | 2014-02-28 | 2015-09-03 | 维沃移动通信有限公司 | Mobile terminal for realizing high-fidelity music playback |
| CN111078182A (en) * | 2019-12-12 | 2020-04-28 | 深圳市深智电科技有限公司 | Android-based music high-fidelity lossless playing system and music playing method |
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Application publication date: 20130206 |
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