Achievement

Focus
  • SG8131- HDMI2.1 10K Signal Generator
  • DTMB-A is adopted as 2nd-Gen DTV International Standard by ITU
  • The China-aided DTMB/DTMB-A Project Kicks off in Timor-Leste
  • China and East Timor sign an implementation agreement for terrestrial digital TV transmission system
  • A delegation from Timor-Leste visited DTVNEL(Beijing)
  • DTVNEL held successfully International DTV Forum in Lao

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DTMB-A transmission system
Author：   Source：dtvnel   Time：2014-03-07 10:34:34  Number： big middle small
In February, 2012, DTVNEL(Beijing) had a major breakthrough for DTMB-A standard research and development. There were 5 significant improvements on that core technologies:
  1. Add parameters “256 APSK and FFT” to increase the maximum transmission bandwidth to 50.7Mb/s, which has exceeding European 2nd-generation DTV standard “DVB-T2” and approximately 50% higher than DTMB standard. It’s easily to meet various broadcasting service.
  2. C/N threshold of reception is better than DVB-T2 standard cause of using Gray-APSK constellation and the latest LDPC code, compatible with multiple code rate (1/2, 2/3, 5/6) and multiple code length (15360, 61440) meantime.
  3. Uses the latest multiplex frame structure and two-dimensional dynamic allocation for the clock and frequency.
  4.  Uses TDS-OFDM antenna diversity technology for reducing the difficulties to set up single frequency network (SFN).
  5. Peak-average power ratio(PAPR) reduction by a special extension of constellation.
A simulation was implemented by FPGA and computer after system design, the feature “C/N threshold” of proto is nearly 1 dB advantage than using a DVB-T2 set top for reception test, DTMB-A standard is also 0.7 dB gain advantage at a performance test for different channel diversity scheme.

After all, DTMB-A Standard depends on careful design and inherit existing advantages from DTMB standard to exceed the other latest international DTV standards.