Product Description
4-Channels SDI to DVB-C Modulator(CATV, HDTV)
Product Overview
HPS852 series products are HIPROTECH's new breakthrough all-in-one devices which integrate encoding (MPEG-2 HD/SD, MPEG-4/AVC H. 264 HD/SD) and modulating to convert V/A signals into DVB-C RF output. It has equipped with 4 HDMI (4 SDI optional) channels input and 1 ASI input and output with 2 ASI ports and 1 UDP IP (4*SPTS) port.
Delay problem has been greatly reduced to achieve an extremely low value from the encoding progress to the decoding terminals.
It adopts inner drawer-type structural design which greatly facilitates the change of encoding modules (HDMI/SDI /) as needed.
The signals source could be from satellite receivers, closed-circuit television cameras, Blue-ray players, and antenna etc. Its output signals are to be received by DVB-C TVs or STBs and etc.
Key Features
* MPEG2 & MPEG4 AVC/H. 264 HD/SD encoding
* Up to 1920*1080@50P/60P supported (MPEG4 AVC/H. 264)
* Up to 1920*1080@50I/60I supported (MPEG2 HD)
* 4* HDMI/SDI input
* 1*ASI input for re-mux; 1*RF input for mix
* Simultaneously encoding each channel more than 10Mbps
* 4* DVB-C RF out (4 carriers combined output)
* Support 4 * SPTS output
* Extremely low delay
* LCN support (Logical Channel Number)
* Excellent modulation quality MER≥ 42dB
* RF Frequency range 30MHz~960MHz
* LCD display, Remote control and firmware
* Web NMS management; Updates via web
Principle chart
Specifications
Why do we need 4 x DVB-C carrier output in one device?
Firstly, it is to guarantee the sound picture quality of HD programs.
As we all know, to guarantee the picture quality of 1920x1080@50I/60I resolution HD program, the video bit-rate may exceed 10Mbps and even reach up to 15Mbps. However,
when the modulating constellation is 64QAM, the maximum possible bit-rate output for single DVB-C carrier is only around 20Mbps.
15Mbps x4 =60Mbps > 20Mbps.
It means the single DVB-C carrier simply can't carry the 4 channels 1080i HD program if the average bit-rate exceeds 10Mbps.
That's why we design 4*DVB-C carrier modulation board which quadruples the maximum possible bit-rate bandwidth up to 80Mbps and above when 64QAM constellation is used. This rightly makes it reliably carry 4 channels MPEG2 HD programs output simultaneously.
Below brief chart will help to more clearly illustrate the working principle.
Secondly, it is cost-saving.
Its high integration allows users to transmit more programs with fewer devices. It undoubtedly saves the cost for you and me.
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