AK78 differentiation chip solution for mobile TV - mobile TV, multimedia, chip - Communications Industry
Ankai new AK78 series of mobile multimedia application processor chips aimed at mobile TV applications. The ARM926EJ core chip, clocked at up to 300MHZ, along with 16KI-Cache and 16KD-Cache. Supported primarily by the video special hardware circuit, including 30 frames per second, D1 resolution H.264 decoder, H.263 codec (also supports bi-directional encoding and decoding), MPEG4 decoder, and a variety of formats. The chip's architecture shown in Figure 1.
In addition to integrated audio and video hardware acceleration, 2D graphics acceleration, AD / DA and other components to facilitate the client to achieve differentiation and lower cost than, AK78 series for mobile TV decoding program on more shows the following characteristics:
Also supports multi-standard Mobile TV standards war has been troubled by the terminal manufacturers headache. In order to reduce terminal manufacturers desperate choice in the standard risk, AK78 series with a rich interface: consists of two SPI and an SDIO interface, is currently the standard authentication support, including (CMMB, T-DMB, DVB-H, ISDB-T etc.), with these interfaces Ankai program can support more than three kinds of mobile TV standards, enabling mobile TV terminals easily achieve regional, inter-national "roaming"? go where can watch TV programs.
Mobile TV Recording While mobile TV terminals are portable reputation, but the user does not care about any time to see their programs (such as meetings run into exciting sports broadcast). Then AK78 series recording function supported by the low cost is very important. AK78 series full support MLC, including the latest 50nm of NandFlash. MLC 1GB size of the current price of less than USD2.8, you can record and save 10 to 15 hours of TV content (depending on the size of the bit rate). That those who do not want to miss their favorite show's "fan" is undoubtedly good news.
Quality and performance assurance With some high frequency AP, totally rely on software decoding H.264 different, AK78 series entirely by hardware circuit to decode H.264, which makes its playback performance is fully guaranteed. Use of software decoding options, at the same time as CPU running the system software and other applications, such as a higher priority communications software, related events may be video processing fluency can be disruptive. In the AK78 series, all the software running on ARM processor, and H.264 decoding such as a waste of CPU resources, the task is accomplished by an independent hardware, and thus effectively avoid the other applications on the watch mobile TV quality.
GPS combined with magical effect of Work and live in big cities have traffic jams of car owners have had trouble, there may be too helpless, agitated or even angry. AK78 series by virtue of their high integration and processing performance, can support GPS and BT,
Mobile PCBA done in less than USD40 machine, even with mobile TV decoding components, the price can also be general consumer acceptance. Integration of GPS and mobile TV will be the benefits that the trucks can navigate, or even real-time road traffic congestion status reports; completely blocked, you can switch to watch mobile TV programs to ease the anxiety of mind.
AK78 series as the SOC for the mobile TV market with its highly integrated and cost-effective design for the different users provided a good choice. April 2008 volume production supply. Ankai also released a complete reference design based on RTOS-based WINCE of BSP.
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