MP3 Collection of technical message !

A common solution MP3 about:

1. Philips SAA7750: more expensive, quality is extra emphatic likened to other procedures, was used effectively in the import of MP3, At the same period the chip is BGA archive, the domestic creation technology is restricted.
2. TELECHIPS the TCC7xx: the price a mini cheaper than the SAA7750, the need for external ROM, external components, multi-point, so too the MP3 also can not do, the sound quality still can.
3. ECT's SKYLARK: button machines currently used domestically, but currently does not support WMA, cost and STMP3410 similar function than the entire.
4. SIGMATEL the STMP34xx/35xx: As many companies are engaged in the evolution of this chip evolution, so the current can function scale up, including electronic images, lyrics synchronization, TXT reading , agitate clock and so on. But because it's part of the program on the FLASH,Men's Minnetonka Driving Shoes, so prone to the phenomenon of losing program
5. Sunplus of Taiwan, the program: the price is cheaper than the STMP3410 point, the sound quality in general, made a lot of use MP3 But revisionism rates than STMP3410 and Actions ATJ2075 low, but also the future Compared to many domestic uses.
6. Domestic Actions ATJ2075: Domestic low-end MP3 is mostly for the service is better, more closely knotted to the user, so the current share is increasing.

Second, the common audio formats:
1, MP3 (CBR, VBR, ABR): MP3 consumers should be considered the most new lossy compression of digital audio formats. Its full name is MPEG (MPEG: Moving Picture Experts Group) Audio Layer-3.
encoding with CBR, VBR, ABR three:
CBR (constant bit rate): Early in the MP3 encoding uses a fixed encoding rate means
VBR (variable Bit Rate): Variable Coding rate of compression. Its principle is to use the intricate will be part of a song by Gao bitrate encoding, simple prejudiced with low bitrate encoded this direction, further progress the unity of hunk and volume.
ABR (Average Bitrate): average bit rate, VBR is an interpolation parameter. Poor for the CBR and VBR files generated volume features original file size of this variable coding mode. ABR among the specified file size, to every 50 frames (30 frames of almost 1 second) for the duration, the low and not perceptive to the stream with relatively low frequency, high frequency and high dynamic performance with high vehicle, VBR and CBR can be used as a compromise alternative.
2, WMA format: WMA is short for Windows Media Audio is Microsoft pushing digital music format. Microsoft officially announced, said the information can be defended WMA format, extremely, with considerable copyright conservation. WMA music file formats can run MEDIA PLAYER9 view the file information available.
3, Ogg format: OGG Vorbis file format, from the design to have many progressive coding technology at its greatest feature is the file format has been nailed on the sound quality can be significant after the correction and the new algorithm. In methodology the same bit rate (Bit Rate) of the Ogg Vorbis can bring better sound quality than MP3. Ogg Vorbis file enhancement is. OGG.
4, WAV format: It is an old audio file format developed by Microsoft, in line with PIFF (Resource Interchange File Format) specification. In the Windows platform, based on the PCM-encoded WAV is the best audio format support, support all audio software can be perfect. WAV you can use a variety of audio encoding to compress the audio flow, but we are all common PCM encoded audio stream is processed WAV, does not mean that only use PCM encoded WAV, MP3 encoding also can be used in the WAV. WAV PCM coding can achieve higher quality requirements, but the capacity is colossal.
5, ADPCM Format: This format is commonly used in MP3 encoding machine recordings. The smaller format (usually WAV files), but the sound quality is poor.
6, commonly accustom terms explained:
bit rate: BIT RATE said unit time (1 second) in the digit of bits sent (bps) speed. BIT RATE melody files that are averaged higher unit time (1 second) in the measure of data need to be addressed (BIT) and more quality melody files is agreeable signification. However, BIT RATE larger file size is tall, it will take a lot of memory capacity, the most common music file morsel rate is 128kbps.
sampling rate: the analog audio into digital audio process understood as sampling, simply the method by sampling the waveform record width of 1 second voice, how many of data. 44.1KHz sampling rate of the voice is to take 44,000 seconds of data to narrate a sound wag. In rule, the higher the sampling rate, the better the sound quality, the sampling frequency is generally divided into 22.05KHz, 44.1KHz, 48KHz three levels. 22.05 KHz FM radio can only be accomplished sound quality, 44.1KHz is the theoretical limits of CD quality, 48KHz audio quality of the DVD already achieved.
ID3: ID3 song is the music file name, the founder can show (not the file name.)
BBE Sound: BBE BBE developed along the U.S. vocational audio technology, the norm of the use of the world's leading high-tech audio, the faultless solution to the ordinary TV sound frequency of occurrence of phase shift and a variety of deformation, laborious to clone the aboriginal problem. With BBE sound enhancement technology, to compensate fhardly everund logging and reproducing sound in the process of loss and lag, production music in the triple is more clear, natural, beautiful and more full of details of the extravaganza, giving strong bass, explicit and full of tempo, the sound can be HI-FI audio and comparable.
SRS Audio: SRS full name of the Sound Retrieval System, which means that voice feedback system, to reproduce the true three-dimensional scene. It is the United States, SRS Labs audio technology patent. Include the SRS 3D surround sound processing technology and SRS TruSurround technology.
SRS 3D surround sound processing technologies: SRS 3D is the effect according to the ear of the court to generate a wealthy sense of three-dimensional sound field of the speaker system, at a time the use of ordinary two-channel amplifier with two speakers will be able to simulate three-dimensional surround sound effect.
SRS TruSurround technology: SRS TruSurround (qualified virtual circle sound) processing of these features is the complete source to retain the original multi-channel audio information, which can form the illusion of increased sound source, so that the listener was more luxuriant than the SRS 3D The surround sound effect. SRS TruSurround Another noteworthy trait is the compatibility of strong, competent to adjust to Dolby Surround, Dolby Pro-Logic, Dolby Digital AC-3 Surround, THX surround home and via a variety of 3D audio processing, but also compatible with DTS and MPEG-2 audio system.
three, MP3 firmware:
1, in the MP3 player in the role:
firmware is a software, refers to a system in the bottom of the go of the most elementary software shrieked firmware. In counting to hardware players in the circumference embark is the firmware (software), and that the strength of the player features, sound quality is closely narrated with the firmware correlate. Firmware upgrades to addition through the functionality of the player, making the player sound better, more powerful.
? solve existing bug the player itself and the negative compatibility issues.
? cultivate the operation,Children's Minnetonka Moccasin, to assist a better approximate to provide better user-friendly features.
? music format to invest more support to better your player sound fascinating sounds.
firmware update can solve the problem of MP3 machine software.
2, common firmware upgrade
A, SIGMATEL program:
(1) Remove the battery, press and hold power button.
(2) Press the power button in the meantime, the MP3 is connected to the computer USB port.
(3) run the firmware update program (reception the power button Note Bu Songshou)
(4) system will automatically quest for new hardware appliance, this process will persist for at least 30 seconds know next to nothing of, relying on the status of the user computer configuration differ, be scrupulous not to let work unlock the power button.
(5) system identification complete new hardware device,Minnetonka Moccasins Boots, there will be an updated interface, let go release the power button, select
(6) update is complete, safely remove USB device, loosen the computer properly connected to MP3, battery, that means the upgrade was successful
B, TELECHIPS program:
B1, DX -6 upgrade:
1, the firmware file to download to your computer, extract the two files generated FIRMWARE.ROM and FONT.BIN.
2, through the USB cable connected to the computer to MP3 and MP3 machines FIRMWARE.ROM copied to the root directory.
3, when the USB cable is removed, MP3 firmware will update automatically.
Note: When the MP3 and the computer is disconnected, MP3 screen will display FAT ERROR, and in a locking state. Being low at this time MP3 format, 256M products will continue in this state 8 to 10 minutes; 512MB of products will be for 16 to 20 minutes, during the period of the MP3, do not do everything. Low grid is completed, MP3 will return to customary
4, MP3 and computer again connected to FONT.BIN files to MP3's root directory.
5, when the USB cable is removed, MP3's role will be automatically updated, and ultimately complete the firmware upgrade.
B2, DX-3 upgrade:
1, on the DX-3 MP3 player, low-level formatted.
① off MP3 players, and HOLD clasp to place lock (key pate in the way).
② while holding down the The screen images will appear, MP3 players, will begin low-level formatting.
③ After low-level format, MP3 player will automatically turn off
2, Download the latest version of the firmware documentation.
① WWW.ONDA.CN download the latest MP3 from the firmware document. .
② MP3 player will be placed on HOLD key lock state (key to head the opposite direction), and MP3 players connected to the computer.
③ will download the firmware update file copied to the MP3 player DMPUMS.UPG the root directory.
④ removed from the computer, MP3 player, safe, and close the MP3 player. Re-open the MP3 player, MP3 player will start automatically update the firmware, after updating, MP3 player will automatically shut down.
3, repeatedly ashore low-level format the MP3 player.
① MP3 broadcast loudspeaker off, and HOLD button to place lock (key head in the direction).
② meantime holding down the pattern of the player shade will seem, MP3 players, will start low-level formatting.
③ After formatting, MP3 player will automatically rotate off.
4, MP3 player installed font files.
① download the font file will be copied to the MP3 player DMP3X0 the root directory.
② removed from the computer, MP3 player,Moccasins Shoes, secure, close the MP3 player, then reboot, MP3 player will automatically update the exhibit font.
5, begin checking for new firmware version: Firmware upgrade is successful, boot the new firmware version will display 1.0.0.7.
B3, MH-2 (MH-928/956) firmware upgrade:
1, open the MP3 player, according to NEVI / MENU key to enter the audio settings menu, select the USB CONNECT option, MP3's LCD screen will display
3, the firmware running on the computer reanimate program MP3 Explor
4, choose the menu [Tool] - [Upgrade Application Code] alternative.
5, follow the hints to load the firmware update document (
6, the computer will automatically update
7, the update is complete there will be [Confirm] boxes, removed from the computer MP3 player, a firmware upgrade
MP3 technical information (4)
C, SKYLARK program:
DX-8 upgrade method:
1, the MP3 and PC connection, the firmware upgrade documentation (BIN format) to MP3 player under the basis catalogue;
2, the right to disconnect the computer MP3, select Upon completion, MP3 displayed COMPLETE, then automatically shut down.
4, reboot, MP3 will show the current firmware version VER 1.03, which indicates that your MP3 player has successfully upgraded firmware.
four, MP3 Caution:
1, to discourage products falling on the ground or to impose severe impact, or could accessible lead to product failure.
2, do not put jeans behind pocket, or sit down capacity of trampled glass LCD screen.
3, connected apt the microprocessor, amuse memorandum that pre-computer USB interface cable is correct, otherwise it will create MP3 USB interface, machine flame, alternatively piece malfunction, guiding to difficulties such for MP3 unit tin not boot. Recommended to interlock to the onboard rear MP3 USB interface for file convey.
4, connected to the computer, make sure the USB cable used for the original MP3 machines supplied cable, the use of other cables may cause the USB interface to burn MP3 machine or chip breakdown.
5, wipe the dust, do not use the volume liquid (such as the Sim that, benzene, etc.) or with a watery cloth, use a soft fabric.
6, AA or AAA batteries external machine, for a long time while not in use, remove the batteries to shirk battery leakage and corrosion of the machine; install the power cell, please note the affirmative and negate do not prop against.
7, AA or AAA batteries external machine, please use the good quality of the battery device, meager battery may reason the machine can not boot or play crash failures.
8, to prevent water or other liquids into the MP3 machine.
9, MP3 connected to a computer for data transfer is completed, be sure to press the WINDOWS taskbar icon under the down arrow (WIN98 operating system, there will be more), MP3 devices safe removal, or loss of data .
5 mutual MP3 audio transition software description:
1, Arial CD Ripper: Ripping and audio conversion tool that can become the CD into MP3, WAV, OGG, FLAC, APE and other file formats , without detriment of quality conversion under the prelude of a track, or just convert the plenary disc, either among differ audio formats conversion function with every other.
2, Easy CD-DA Extractor: DVD audio tracks to CD or convert WAV, RAW file tool, you can encounter the MPEG Layer-3 Audio Codec CD instantly convert MP3. And it too supports the CD downloaded from the Internet CDDB music track message, can create CD to your computer music library.
3 super king (audio tool)
VI FAQ:
Q: Why is there when the MP3 player to skip, freeze in skylights?
A: Because some of the MP3 files and MP3 supported scope of different machines, prone to skipping, the Dead phenomenon, commonly for several reasons: the sampling rate does not, generally 44.1KHZ, sometimes 48KHZ files can not be used; compression ratio, if the MP3 does not support the MP3 compression rate (also high or too cheap); VBR is not supported; there is one cozy problems is that some file is ziped from super throne, the default is ziped into MP2 format, but shows the MP3 format, most of the machines do not support MP3.
Q: Why has the MP3 files to MP3 player, but can not find playing MP3 files?
A: Many MP3 players can merely support the FAT file partition mode, whether the WINDOWS under the MP3 file format as FAT32 or NTFS partition means, MP3 player will not peruse activity the file. The solution is to connect the MP3 to your computer, re-formatted FAT or FAT16 file partition usage.
In addition, some models of MP3 products,Women's Minnetonka Ankle, the need to copy MP3 files to a special direcotry ahead they can play, such as the use SUNPLUS programs I128, have to copy the songs to MP3 MP3 player / AUDIO / MUSIC folder, and if the Q128 into the MP3 player to be
Q: Why is the downloaded songs can not play wma?
A: MP3 can not play wma music, there are several reasons:
(1) make sure it supports WMA format, MP3 music machine decoding playback.
(2) WMA files KRM (prerogative) of the copyright protection fathom, the intended self-made wma. Using the WMP (windows medium player) make wma, please do not select the copyright protection. In WMP the menu (Ie, not selected), and then make wma files on it.
Please open your WINDOWS MEDIA PLAYS player, the menu obtainable for download.) Our players will be connected to the PC digital machine, there will be a removable disk (such as F: ) Then, in WINDOWS MEDIA PLAYS player by the left of the midpoint of the On the left select the anthems you want to copy the name, then reception the top left turn of the Congratulations,Women's Minnetonka Knee Length, you can be your preference WMA songs to bring to anyone place to listen to the do.
(3) sampling rate bad.
(4) out of support range compression.
Q: Some songs show the time when the play was chaotic
A: the current format, compressed using VBR MP3 files (you can speed compressed MP3 files) during playback caused by changes in the rate of alteration in the time display, but the play correctly, this chapter of the software you are using a fixed rate