First, Philips Series
Origin: Netherlands
If you must be awarded the best MP3 decoding chip on the market, then it is undoubtedly a Philips chip. The Philips family's decoding chip has been known in the industry, "full-function, good sound quality, high price".
Philips's decoding chip generally uses BGA packaging processes, and this technology is quite limited, in addition, due to Philips's decoding chip needs to work with additional control chip circuits, the product cost is higher. Therefore, vendors using Philips decoding chips are often positioned in high-priced, such as MPIO and IRIVER two Korea MP3 professional manufacturers. One of the two most important common features of these two brands is to fully use Philips's decoding chips in the product. Therefore, their products have high sound quality and quality, becoming the object of global MP3 enthusiasts.
1, Philips SAA775X Series (SAA7750 / 7751/7752/7753)
Philips SAA775X chip is one of the most functional (supporting CD direct records) in the MP3 player decoding chipset in the market, and is one of the best results in the decoder chip. The sound quality of the decoding chip is: the bass is deep, and the middle sound is excellent, and the treble is generally compared.
Since the SAA775X contains DSP (Digital Signal Processing, Digital Signal Processing) and 32-bit ARM RISC processors, it can work with ultra-high integration single chips, audio decoding, voice coding, etc., and can be added (Secure Digital) Music Initiative, Safety Digital Music) Protection.
Where SAA7750 contains DSP and 32-bit ARM RISC processors, the signal to noise ratio is 90dB. The chip is compatible with multi-stage multi-gear EQ intelligent sound effects, supports voice records in ADPCM format, synchronize the song name and song information, line-in direct record, and support USB 1.1 / 2.0 standard, support multi-music format decoding. The SAA7751 has only DSP kernel and flash memory, and does not include audio multimedia decoder, which can only be used on the MP3 CD disc player that can be upgraded. SAA7752 is a solution for price-only, with only DPS chips, using external memory to store data, mainly for CDs. As for SAA7753, there is only a DSP chip, and the change is more thorough, and simply use embedded memory instead of flash memory, corresponding to the low price CD playback system, as an additional MP3 function.
Philips SAA775X uses an embedded processor with advanced energy management capabilities, which requires control processor running speeds to extend battery usage, similar to energy saving technologies that are commonly used in high-end PDAs and laptops. Therefore, when the SAA775x chip is played in a normal volume of 128kbps mp3, the power supply time of a single AA battery can be up to 24 hours. Of course, this is the theoretical working time of the chip. For the MP3 player, the specific working hours areother the same due to the constraints of the production process.
2, Philips NEXPERIA PNX010X Series (PNX0101 / 0102/0105)
The PNX010x series decoding chip is also a large series, including PNX0101, PNX0102, and PNX0105. Where PNX0102 and PNX0102 are developed for flash MP3, and PNX0105 is a product for a hard disk multimedia player.
The PNX0101 embedded 4Mbit programmable flash, only support USB1.1. All USB 2.0 interfaces equipped with PNX0101 chip MP3 are implemented by additional USB 2.0 control chips. (Note: Using Molex's use can support USB 2.0, SD / MMC extension, etc.) and PNX0102 is embedded with 8Mbit to programmable flash, which provides support for USB2.0. PNX0105 also supports USB 2.0, and also supports interfaces such as GDMA and IDE (ATA / ATAPI / PC Card), but it does not have built-in programmable Flash. Only the product of the PNX0101 is currently arrived in the market, and the Upper market is the latest MP3 player FY400 using PNX0102, while PNX0105 will be available in 2005. The MPIO FY400 uses nano-mirror-related, bright backlight (4 lines FSTN LCD), metal case, convenient and fashionable rotation operation key design unique design. In addition, mainstream functions such as FM frequency modulation, voice recording, mobile storage, etc. should have. The MPIO FY400 fully supports audio format such as MP3, WMA, ASF, providing 128MB / 256MB / 1GB of three capacities. Enhanced Philips sound, 3D sound effects, and 7 EQ patterns fully exerted the good quality of Philips chip family. In power consumption, the FY400 using a AAA battery can be played continuously for 20 hours (the working time of the Philips chip is not necessarily inserted), the volume is 82 × 31 × 28.5 mm, and 40.5 g. The price is $ 120 (128MB), $ 150 (256MB), $ 220 (1GB).
Second, Telechips TCC730 / TCC731 series
Origin: South Korea
Last year, the Korean Telechips decoding chip on the market was unanimously praised in the world, and it grew rapidly under the strong support of many manufacturers in Korea. From the perspective of function, performance, sound quality, Telechips TCC730 / 731 is better than SIGMATEL's STMP3410, the chip, which is sufficient, and the performance is relatively balanced, and the sound field is more wide; but with Philips SAA7750 / 7751 There is still a certain gap. In addition, the price of Telechips TCC730 is cheaper than SAA7750, but it is necessary to take an external ROM, which is more peripheral components, so the MP3 products of this chip are rare with exquisite products.
The industry is generally believed that the Telechips chip performs between the SIGMATEL STMP3410 and SAA7750 / 7751 series. With the MP3 of this chip, on the basis of the sound quality itself, there will be a certain increase after equipped with a more high-end headset. This type of machine generally comes to the Senhesel MX300 (or OEM Senhar) headset, which belongs to the most civilized headset in the Senhar's popular MX series, so it is recommended to have a higher requirements for sound quality. Friends can try Senhe Sel MX500, or higher Koss SP / KOSS PP, Senhai Sel PX100 / PX200. Because the MP3 using the chip has a certain potential on the sound quality, it is not like all dealers tell you, all MP3 has improved after replacing high-end headphones, in fact, some MP3 self-chips and design, production process restrictions Make it no sound quality excavation space.
At present, the MP3 of this chip is mainly available in Dantin Datum MH356, DEC Street Dance Series, WEWA King's Voice, and the Magic Sound of China.
Silver metal aluminum alloy fuselage, streamlined design makes the entire body smooth, and the black plastic with the side of the fuselage, less and generous, more exclusive, let people feel the truth from South Korea Manufacturing process. Dudding Datum MH356 This MP3 most worthy of the probably its FM broadcast transmit function. Or some people complain that the transmit power of the FM broadcast function is small, and the signal is weak, but the broadcast effect of the FM that is positioned in the 1.5 meters of Dudding Datum MH356 is still very fascinating. satisfying. In addition to mainstream functions, the most considerate is the two 1350mAh fragrant adhesive batteries (common in Walkman) and charger, which is not worried about your electricity. On the sound quality, after the Sennheiser MX500, the overall sound quality performance is excellent, of course, this is inseparable from the TELECHIPS chip used. On the restore of vocals, Germany of Germany, the German headset, Senhe, German headphones, is very satisfied, but its standard earphones reflects the music performance "sound field, people The characteristics of excellent sound, high-calorie clear, low frequencies.
Third, Sigmatel series
Origin: United States
If you want to say that the MP3 chip market share, then the Sigmatel family in the United States is definitely named to be realized, but for the quality of the Sigmatel chip, it is always benevolent to see the benevolence, and the wise is witnessed. Overall, the MP3 sound quality of the SIGMATEL decoding chip will be in the rules, the sound is relatively bright, and the middle sound is in general, the low sound is insufficient, the treble is relatively hard, it is inferior to the music of Philips and Telechips chips.
1, Sigmatel 3410
When the Sigmatel 3410, the Sigmatel 3410 is also occupied by the half-Wanjiang Mountain in the MP3 chip market, which may be the most mature and common solution until the STMP3410 single-chip program is still the most mature and common solutions. Its price is low, and a good program of transplantation has grabbed the market share of 80% decoding chip in 2003.
The sound quality of the chip is generally used in medium and low-end products. The solution that is now mature for the SIGMATEL 3410 chip, but if there is no more design on the peripheral circuit, the sound quality will be very general. This is why there are many products that use the chip, but the sound quality is the reason why the clouds have a cloud. The MP3 player with Sigmatel 3410 solution mainly has Maycom XP168R, DEC M220R series.
2, Sigmatel 3420/1342
Sigmatel 3420 is more like the SIGMATEL 3410 upgraded version, does not support MP3 hardware encoding with STMP3410, and the processing speed is relatively slow, and Sigmatel 3420 adds support for USB2.0 on the basis of Sigmatel 3410, and corrects Sigmatel 3410 to certain The motherboard USB2.0 is incompatible, and the MP3 hardware encoding function has also increased, and it is also improved in terms of sound quality.
Sigmatel 1342 is a functional enhanced chip designed for flash drive. The chip has relatively small features, mostly used on a flash drive with MP3 playback function, and its sound quality is roughly related to Sigmatel 3410 in Bo. between.
3, Sigmatel 3510/3520
Compared to Sigmatel 3410, Sigmatel 3510 not only supports USB 2.0, but also improves integrated energy management, supports battery charging function detection, and strengthens the music amplifier circuit of digital / analog converters and headphones, has smarter management capabilities such as subdirectory management capabilities. The function, you can say that the Sigmatel family's chip has developed into Sigmatel 3520.
Sigmatel 3520 improves the shortcomings of SIGMATEL 3410/1342, the shortcomings of the high-lead, the sound quality is clear, the signal-to-noise ratio is said to reach 95dB; increase the support for MP3 hardware coding, FM radio and USB2.0; Sigmatel 3520 It has also increased in the processing speed than the previous generation, reaching 75MHz (34xx series is 65MHz). The MP3 of each price of the market now has the shadow of the Sigmatel 3520 chip, which is also explaining the long-term progress made by the Sigmatel 3520 chip. The following is a Meizu E2 that is adopted by Sigmatel 3520 chip and is affected. If the quality has a luxuriant and simple, then E2 will undoubtedly belong to the latter. Slightly despite the mediocrity of the appearance, cover up its excellent quality. As the ME series enhanced version (PLUS) E2 adhering to the ME series SIGMATEL 3520 chip, many people audition, unanimously believe that its performance is good, in the overall music expressive power, E2 performance can be smashed, especially in TMO And the restore of the vocal performance is excellent, but there is a thin separation in the bass, in the musical instrument, especially Bass, and the divestry is slightly less suspicious. In short, this is a typical MP3 using Sigmatel 3520 chip, which is satisfactory.
4, Sigmatel 3550/3560
Sigmatel 3550/3560 is a chip dedicated to a hard disk MP3 player with a processing speed of 75MHz. Function They are based on Sigmatel 35x0. In order to improve the hard disk as a shock absorber, an SDRAM interface has also been added. Sigmatel 3510/3520 and 3550/3560 In addition to the package, the main difference is that 3550/3560 can also support lithium batteries and USB direct charging, so everyone can see the use of lithium batteries, support USB2.0, 80% may It is made of Sigmatel 3550, 3560 chip.
The difference between SIGMATEL 34XX and Sigmatel 35xx series is mainly in the following two aspects: USB1.1 is upgraded to USB2.0; battery life growth, such as innovative TX-FM, using 1 7th battery can play continuously for 15 hours .
5, Sigmatel 3502
The chip is known to aim at the high-end market, and the design of the chip and the peripheral circuit has been greatly improved. It is known as the third generation of decoding chips, which will boost the DSP digital signal processor's main frequency to 75MHz, signal-to-noise ratio of 95dB, output The power reached 11MW, and the total harmonic distortion rate is also less than 0.05%. MSI launches its own civilian product MS-5511 enhancement.
MSI MS-5511 Enhancement is using the US SIGMATEL Corner Technical Products Sigmatel 3502 Decoding Chip. Combined with MSI first-class manufacturing process, internal circuit design, welding process, circuit board materials, etc., the unique technology, etc. After audition, in the performance of music, the SIGMATEL 3502 chip adopted by MSI MS-5511 makes people feel that there is not much breakthrough with the Sigmatel 3520 chip, but for a priced price of 399 MP3, it is indeed a good choice. In addition to the many functions of the promotion, I think the 24-hour MP3 product enjoyment of MSI is probably the most attractive. This is very rare in the middle and low-end market.
Third, SKYLARK chip
Origin: South Korea
South Korea's Skylark chip, current domestic button machines are used, but WMA is not supported, the price is similar to STMP3410, and the function is more complete. The main features of Skylark are low power consumption, clear sound and pleasing; recording generation files, can choose compression bit rate; encoding direct recording function, and can adjust compression bit rate as needed; Built-in FM FM radio, China, Japan, Europe 3 types of standard options can be received in the player; Chinese, English, Korean, Japanese and other languages; song name, ID3, lyrics synchronization display (support Chinese song name, lyrics display); independent file delete Function, convenient use; AB point reputation; internal memory capacity query, you can query the capacity of internal memory. Needless to say, the representative of the Kylark chip is Dudding DX-8. For eggs, we have understood too much, and it is not described herein. We are unfortunate that they do not support WMA file formats, they are not contemplated. Four, atmel chip
Origin: United States
US ATMEL is the DSP, MCU's leading faucet. The AT89C51ND1X series chip is a DSP MCU hybrid solution for embedded multimedia applications developed by MP3 industries. The MP3 integrated USB of this chip is used, the MMC embedded very small system software is used, which is fully equipped with USB functionality only 15K byte firmware code. This MP3 decoder and hardware interface controller are very low power consumption.
Five, Huayan
Origin: Taiwan
The chip function of Taiwan China is simple, generally used for low-end products, such as no LCD display, or SD card player. Double chip structure (separated by CPU and decoding chip). The sound quality is more distinctive, the bass is good, the medium and duplex is general.
Sixth, Yutao ATJ2085
Origin: Zhuhai
ATJ208564 PIN package, high integration. Support format has MP3, WMA, WMV, ASF play, support FM, chip price is cheaper. Many continental manufacturers are now using this tose force ATJ208564PIN, and the disadvantage is that the sound quality is general, barely listening, and the FM is also to be improved.
