"Ovi video launched 1080p HD video development platform based on H.264
Avst (Beijing avsolutiontechnology Co., Ltd) has been committed to providing customers with embedded evaluation systems and reference designs closer to products. This time, it took the lead in launching the 1080p HD video development platform avst based on H.264_ Evm6467zut7 and avst, a development platform that further supports 4-Ch D1 multi-channel video_ Evm6467zut7 plus. The above platforms are Ti based DaVinciTM family high-end processor tms320dm6467zut7. The processor includes a high-performance DSP core that can run at 729mhz, an ARM926EJ-S core that can run at 364.5mhz and hdvicp HD video coprocessor. The dm6467zut7 can support 1920 at most × 1080I60/1920 × 1080p30 resolution H.264 HD video encoding / decoding function.
"Codec is still one of the core competitiveness of HD video system. Therefore, we have carefully produced DSP image library including aac-lc / he and h.264-hp codec algorithm, so that customers can use avst immediately_ The dvtb component provided by evm6467zut7 development platform evaluates the H.264 HD video codec algorithm supported by the processor. " Mr. touse Hou, manager of Ovi video software department, said.
AVST_ Evm6467zut7 integrates many original designs to help customers quickly launch 1080p HD video products. The hardware system adopts 8 stacked PCB designs, which greatly reduces the plate cost on the basis of ensuring signal integrity (SI) and power integrity (PI).
"Because DaVinciTM family processors use low-voltage multi power supply and DDR2 low-voltage high-speed memory as main memory, especially dm6467zut7, a high-performance processor, the video ADC sampling clock required is up to 148.5mhz in 1080p format and 162mhz in uxga format, so we must carefully design the power supply system and reasonably distribute plate stacking, So as to ensure that the ripple, power on sequence and power supply current of the whole system can meet the needs of HD video system. " Mr. lemon Chan, manager of Ovi Video Platform Department, said.
In the selection of flash, avst selects tssop encapsulated SLC flash memory chip with higher reliability, fewer bad blocks and easier procurement and welding as bootrom, which can take into account the reliability requirements of industrial applications and the cost requirements of consumer applications.
After extensive market research, avst adopts a Ti high-performance HD video ad chip TVP7002 and an ADI high-performance HD / SD video Da chip adv7343, canceling the RCA interface of YPbPr and replacing it with two DB15 stack connectors. In terms of SD video input, avst adopts a Ti tvp5147 high-performance video decoder chip.
"We actually weakened the function of SD video, because the encoding and decoding of HD video is the biggest highlight of the dm6467 processor. However, considering that customers may need to expand the SD interface on the product panel, we integrated the chip tvp5147 into the design through a 2 × 5 dip connector as an extension. The DB15 connector is used because a large number of customers' HD video input sources are desktop computers or projectors from VGA interface. The DB15 connector can take into account both VGA interface and YPbPr interface, so as to cover a larger customer base. " Mr. lemon Chan said.
Supporting Gigabit Ethernet is another highlight of dm6467 processor. Since the compressed bit rate of HD video will be between 4mbps-20mbps, 100m network is not enough to meet the needs of HD video network transmission, especially in some occasions where high-quality image quality is required, such as medical system, radio and television system, court trial system, etc.
"We replaced the network chip used by Ti in the reference design, because it is difficult to meet the mass production demand in terms of price and delivery date. We also adopted the Gigabit Ethernet connector of Hanrun technology and redesigned the driver, so that customers can easily buy chips and connectors without waiting for months of delivery." Mr. lemon Chan said.
The solution of avst also adds many common interfaces in the design, including 2 RS232 interfaces, 1 USB interface, two-color LED indicator, infrared signal receiving tube, etc., and the most characteristic is that the solution also supports 2.5-inch SATA high-speed hard disk expansion interface.
Mr. Chen Liming said: "for products like streaming box, we may not need storage devices very much, but for some applications with higher security level, we can't guarantee the all-weather stability of the network, so we need local storage in the embedded terminal, and the flash memory based scheme is difficult to meet the demand of high-definition video for high-capacity storage devices, The 2.5-inch SATA interface high-speed hard disk is the most suitable choice in terms of power consumption, cost and capacity. "
Avst also launched avst for HD video and multi-channel CIF / D1 video applications_ Evm6467zut7 plus development platform can support 4-channel D1 H.264 multi-channel video compression or 1-channel 1080i60 / 1080p30 H.264 compression.
AVST_ Evm6467zut7 plus supports widely defined audio and video expansion interface standards. It can support ti's most advanced multi-channel video decoding chip tvp5158 through the expansion interface, so as to realize the DVR / NVR system of multi-channel video (4-Ch D1, 8-ch CIF, 8-ch half-d1, 8-ch CIF plus 1-ch D1).
Currently, avst_ EVM 6467zut7 has started full supply, avst_ Evm6467zut7 plus has begun to accept orders.
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