Like electronic computers, that is, computers, PND products also have their main chip processors, and there are only a few brands to choose from compared to PC mainstream CPUs. The main chips of GPS navigation products are more diverse.
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At present, the main chips used in portable GPS navigators in China include SiRF, Telechips, MEDIATEK, and MStar. The GPS solutions developed with these manufacturers' chips are also very rich in configuration. GPS equipment manufacturers will choose one or more of them to launch their end products, that is, the same brand manufacturers will choose different chips according to different situations to launch products of different grades and different functions.
The various chips introduced by various chip manufacturers have different performances and characteristics, so it is of practical significance to clearly identify the processor equipped with the navigation device for quickly selecting the car navigation product that suits your requirements. Here is a brief introduction to the various mainstream processors, so that everyone has a concept when purchasing (the data is partly from the Internet).
First, SiRF chip
The domestic navigation system using SiRF series chips can be said to occupy a large share of the market. This is because the company's chips have always had good performance, and the domestic GPS solution providers have launched the most programs, so they occupy an important position.
Excluding the highly successful SiRFStar III processor from the previous generation, the SiRF chips currently available in the navigation device include Atlas IV, Prima and AtlasV. AtlasIV (500MHzARM) and Prima (600MHzARM) were introduced in the early two years. Due to their high frequency and support features, the performance is outstanding. The products using this chip have always been the representative of multi-function, high-performance navigators on the market.
AtlasV supports a variety of peripherals, such as CMMB, video input and other functions, and Prima products also support 3D hard pressurization circuits such as OPENGL, which is even more powerful. As for the AtlasV (500-664MHz ARM) processor, it has only recently launched in the market. Compared with the Prmi processor, the 3D and video parts are weakened, but the cost is reduced, and the chip size is reduced. It is a good partner for cost-effective products.
SiRF series AtlasIV processor navigator, the main high-end market, the launch time is quite long, the product price has also been lowered, according to different configuration prices from 599 yuan to more than 2,000 yuan; Prima core products are mainly high-end, the price is relatively high, According to different configurations from 899 yuan to more than 2,000 yuan; and the new AtlasV processor is aimed at the entry market, there are not many additional features, the product price is relatively low, mainly concentrated between 499 yuan to 1,000 yuan.
Second, the Telechips chip
Telechips' processor has always had a good performance in multimedia performance. I believe that you can also hear it on the MP4 portable multimedia player. The navigation device of the factory processor also has good multimedia performance, such as Tcc7901 (500MHzARM). Advantages of RM file playback, the latest Tcc8901 (600MHz ARM) processor supports 1080P full HD video decompression.
In addition to the high frequency of 600MHz, the most prominent of the TCC8901 is support for video hardware decoding, including MJPEG, MPEG-1, MPEG-2, MPEG-4SP, MPEG-4ASP, MPEG-4 AVC (H.264), DivX, H. 263, WMV9, VC-1, RV, with 2D/3D graphics acceleration engine, and OverlayMixer, can output smooth 1080P full HD video.
The Navigator of Telechips' Tcc7901 processor is currently available on the market, and the price is relatively cheap, below 1,000 yuan. The latest Navigator with Tcc8901 chip is equipped with HDMI full HD output function. According to different configurations, the final The retail price of the product market is around 1100 yuan to 1700 yuan, and the price is good.
Third, MEDIATEK chip
MEDIATEK, also known as MTK's MT3351 (468MHz ARM) processor, is quite successful. This is because the chip has too many performances and features that are not lost to AtlasIV, but the price of the chip is relatively low. There are not many information about MT3351 on the Internet. From the perspective of current terminal products, there are still many features supported by this processor. For example, CMMB mobile TV, AV-IN video input, Bluetooth, etc. can also be equipped as needed.
Products using the MT3351 navigator, due to most of the price-performance ratio, the hardware configuration is not necessarily satisfactory, for example, some are equipped with 64MB cache, while others are equipped with 128MB cache, so when running the navigation system, the effect is still certain The difference, this needs to be noted.
MEDIATEK's chips have always been considered to be cost-effective. The AtlasV processor from SiRF seems to be a large part of MTK1 for MTK. At present, the products using MT3351 chip on the market, depending on the configuration, the price is between 399 yuan and 2,000 yuan, which is relatively cheap.
Fourth, MStar chip
Mstar is also a well-known manufacturer of ARM processors, but currently the mainstream navigation devices still in use in China are only one MSB2501 (400MHz ARM). Because the frequency is relatively low, the performance is not too competitive, so the manufacturers and final products using the chip are not many, mostly entry-level products, the configuration of high-definition screen is rare or not.
The performance of the MstarMSB2501 is not well-recognized. The overall performance of the navigation products using the chip solution is similar to that of the previous SiRF StarIII processor navigator, so it has a slight disadvantage in the latest round of product performance competition. However, because the price of its navigator is quite cheap, it is probably maintained at 399-499 yuan or even lower, there is still a certain market.
V. Summary
The above price range is only the current media mainstream product quotation collection, in fact, may be different from the actual market price, according to the different additional functional configurations that the manufacturers give to the navigator, even if the cost of the less expensive chip navigation device The actual selling price may also be higher than that of the higher price chip.
For example, the most popular CMMB mobile TV, real-time road conditions, mobile speed radar, Bluetooth, reversing wireless rear view and other configurations can also be used with different chip navigators, and the price of the final product is not the same.
Therefore, when choosing a navigator, in addition to recognizing the processor, it is necessary to comprehensively consider various aspects such as brand value, function configuration, and after-sales service, and choose the product that best suits your requirements, so that it will be used comfortably, and the money will be spent. . This is not a list of boring detailed hardware parameters, not exhaustive, but I hope that through this simple chip review, we can let everyone know about the concept, in the face of a dazzling car navigation system, there is also a standard of judgment. .
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