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1) A number of domestic mainstream CAs have been integrated, and currently include: Yongxin Video, Digital Video, Dexin, Solutong, Lianguang Video ABV, Sanzhou Xunchi, Quanzhi, etc. .
2) The loader of the set-top box can meet the relevant standards and run stably.
It can be replaced and upgraded by serial port or online.
3) Support automatic and manual full-band search, single-frequency search, automatic full-band one-key search, search without setting parameters, you can also search the station in seconds through the program follower, all controlled by the computer room, program changes, users do not need to operate, Users can edit programs according to their own preferences.
4) Support on-screen notification and mail functions; support parental hierarchical control and program setting functions, with partition function, subtitle broadcasting function.
5) The remote control supports the learning function, and the distance of the remote control can reach 20 meters, and the power supply of the TV can be controlled by the remote control of the set-top box.
6) Support various basic services of digital video broadcasting and subtitle broadcasting application functions, such as digital video, audio broadcasting, electronic program guide EPG.
1. Hardware platform technical parameters
1 | CPU Processor | Dual CPU architecture (MIPS 24KE) processor |
2 | Main Chip | M88CC6000-T (Lanqi) Embedded 512Mbits/1Gbits DDR |
3 | Tuning chip for tuner | 8MB(64Mbits) |
4 | FLASH memory | 64MB DDR2 (i.e. 1Gb memory) |
5 | SDRAM | 1024Mbits DDR2 (i.e. 1Gb memory) |
6 | RF input interface | British F type |
7 | Video output interface | 1 CVBS composite signal, RCA interface |
8 | Audio output interface | 1 set of left and right channels (stereo), RCA interface, 600Ω unbalanced |
9 | HDMI high-definition interface | 1 channel, support HDMI 1.4 |
10 | USB interface | 1 way USB 2.0 interface |
11 | Power supply | Power adapter: 5V/2A or 12V/1A, (220V/AC is also available) |
12 | Display panel | 3-digit LED digital tube, 1 power indicator light, 1 signal lock light, 2 buttons |
2. Main technical indicators
1) RF input
Project | Parameter |
RF input frequency | 47-870MHz |
Input resistance | 75 Ω |
Minimum input level | UHF ≤25dBuV （Mode 7） |
VHF ≤24dBuV （Mode 7） | |
Maximum input level | ≥82dBuV |
Physical channel bandwidth | 8MHz |
Gaussian C/N threshold | 15.2dB （Mode 7） |
Rice C/N threshold | 16.1dB （Mode 7） |
Rayleigh C/N threshold | 20.1dB （Mode 7） |
Echo delay 30uS | 23 dB （Mode 7） |
Frequency capture range | ±150kHz |
Input reflection loss | ≥8dB（Test on the currently tuned channel of the RF tuner） |
Demodulation method | Adaptive 16, 32, 64, 256 QAM (basic requirements) |
Symbol rate | 3.6-6.952Mbaud（64QAM） |
2) Video output
Project | Parameter |
Video output amplitude | 683.4 mVp-p |
Video synchronization amplitude | 288.1 mVp-p |
Video frequency characteristics | -0.16 dB (≤4.8MHZ） |
-0.34dB (4.8~5MHZ） | |
-1.08 dB (≥5.5MHz) | |
Video signal-to-noise ratio (weighted) | 66.3dB |
Differential gain | 2.1% p-p |
Differential phase | 1.7% p-p |
Brightness non-linear | 2.2% |
Chroma/Luminance gain difference | 0.1% |
Chroma/luminance delay difference | 5.8ns |
K factor | 1.9% |
3) Audio output
Project | Parameter |
Audio output level | -0.8 dB |
Audio distortion | 0.13 % |
Audio frequency characteristics | 0.27dB |
Audio signal-to-noise ratio (no weight) | 76dB |
Audio left and right channel crosstalk | -77.5dB |
Audio left and right channel phase difference | 0.21dB |
Audio left and right channel level difference | 0.1dB |
4) Signal decoding requirements
Channel coding | RS code | RS ( 204，188 ) |
Convolutional interleaving depth | I = 12 | |
Raised cosine square root filter roll-off coefficient | 0.15 | |
Video decoder | Fully compatible with DVB, supports: MPEG-2 MP@ML/HL H.264 BP (with no ASO/FMO), MP& HP@ L3/L4.1 AVS Jizhun profile @ L6.0/ L4.0 AVS Broadcast profile @ L6.0/ L4.0 MPEG-4 SP Profile, Advanced Simple Profile @ Level 5 without GMC/Data Partitioning/Reversible VLC VC1 SP@ML, MP@HL, AP@L0~3 H.263 baseline profile JPEG decoder engine | |
Audio decoder | Stand by MPEG-1/2 Layer I/II/III Dolby AC3/AC3+ (optional1) DRA 2 CH/5.1 CH (optional1). Support single channel, dual channel and stereo, mixing, etc. | |
Demultiplexer | 16 hardware PID filters (at least) | |
Descrambler | Support DVB general descrambling algorithm. | |
Resolution, display ratio | Support 1080P, 1080I, support 4:3 and 16:9 | |
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