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1. The design of our company's THS-7100 digital TV set-top box is fully compliant with the DTMB standard. The set-top box has national 3C certification, ISO9001 quality system certification, and national energy efficiency certification. Comply with GB 20600-2006 "Digital TV Terrestrial Broadcast Transmission System Frame Structure, Channel Coding and Modulation" and H.264 "ISO/IEC 14496-10:2010" / AVS "Information Technology Advanced Audio and Video Coding Part 2: Video" ( GB/T 20090.2) coding standard, in line with "Digital Video Broadcasting Chinese Service Information Specification JY/Z-174-2001", "Digital TV Broadcasting Electronic Program Guide Information Specification", etc.
2. THS-7100 system products comply with the national and industry standards related to household appliances, such as: "Safety of Information Technology Set-Top Boxes (including Electrical Business Set-Top Boxes)", "Grid-powered household and similar general-purpose electronics and related set-top boxes Safety Requirements, "Sound and TV Broadcast Receivers and Related Set-Top Box Radio Interference Characteristics Limits and Measurement Methods", "Information Technology Set-Top Box Radio Interference Limits and Measurement Methods", "General Specifications for Special Digital TV Receivers", "Special Measurement Methods of Digital TV Receivers, General Rules of Basic Environmental Test Procedures for Electrical and Electronic Products, etc.
3. The set-top box has passed the China Compulsory Certification (3C (China Compulsory Certification) certification) and the national energy efficiency label certification.
4. The whole production process of Tonghui electronic set-top box products from design, electronic component procurement, motherboard patch processing to complete machine assembly, aging, software upgrades, etc. has undergone strict quality control, and has undergone strict testing and inspection before leaving the factory to ensure the product The index meets the requirements, and the product can run stably and reliably for a long time.
5. The product's power supply circuit adopts wide-voltage lightning protection design, the product stability is greatly improved, and it is more convenient for users to configure and maintain the power supply.
6. The product's remote control adopts stainless steel pot piece design, which is waterproof and anti-drop, good in hand feeling and long service life.
7. The product has a variety of appearance designs for users to choose from, including iron boxes, plastic boxes, built-in and external power supply designs, and other styles of products.
1. Hardware platform technical parameters
1 | CPU Processor | Dual CPU architecture (MIPS 24KE) processor |
2 | Main Chip | M88CS8001 (Lanqi) Embedded 512Mbits-1Gbits DDR (H.265 requires M88CS8051-T) |
3 | Tuning chip for tuner | ATBM8880+Si2141 |
4 | FLASH memory | 8M(64Mbytes） |
5 | SDRAM | 64MB 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 | Built-in power board 220V/AC power supply, (5V/2A or 12V/1A also available) |
12 | Display panel | 3-digit LED digital tube, 1 power indicator light, 1 signal lock light, 6 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 | Stand by: -HEVC/H.265 MP@level 4.0 High tier (only M88CS8051T 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 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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