Tag: IPTV P2P technology
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I. Overview
IPTV is network TV. It uses computer (PC) or "common TV + network set-top box (TV + IPSTB)" as the main terminal equipment to provide users with video on demand, Internet access, e-mail, games and other services. Based on its own streaming media technology, P2P technology, content distribution management technology and operation support technology, Beijing Wanshitong Technology Co., Ltd. has launched a domestic first-class IPTV system based on the development trend of IPTV applications, which can satisfy customers well. The application needs.
Second, the network structure
The network structure and related hardware devices can be configured according to the actual situation, and the requirements for high concurrent user access in various situations such as complex network environments, different access modes, and different user requirements are realized, and flexible scalability is provided.
Third, the functional characteristics
1. Adopting self-developed streaming media platform, which is characterized by advancedness, integration, convenience and economy, and belongs to the mainstream products in the market;
2, multi-server cluster, using the load balancing strategy to effectively play the role of the platform;
3, live on-demand software can achieve a variety of playback methods: broadcast, multicast, unlimited broadcast. Multi-channel programs can be played simultaneously, and users can choose at will, and can also receive multiple programs at the same time;
4, support C / S or B / S architecture, seamless integration with the Internet, easy to remote management;
5. Through the authority management, different administrators can be customized to perform related operations to ensure system security;
6. Perfect certification charging system to ensure large-scale billing accuracy;
7, unified server management, all server management is fully managed through a management system, reducing the probability of management errors and operational errors;
8. Support multi-device broadcasting. The broadcast channel provided by the system is theoretically unlimited. In practice, it can be adjusted according to the performance of specific machines;
9, provide real-time broadcast service, the system provides multi-channel broadcast channels by default;
10, simple and intuitive user operation, simple appearance, simple configuration makes the user's operation more convenient;
11. Broadcast across network segments;
12, safe and reliable, fully available for 7 × 24 × 365 continuous service.
Light strobe, even when the radiation is still life, the naked eye can not detect the strobe, but also prone to visual fatigue, damage vision.
If it is to observe the moving objects (especially faster) and in the light under the fine work, not only depending on the material is unclear, the greater the damage to the eyes.
Questions about flicker-free light may arise at this point. To be fair, it should be pointed out that fluorescent tubes operated with conventional or low loss ballast also flicker at 100 Hz and the light output is reduced at lower ambient temperatures. Fluorescent lamps operated with an ECG, including energy saving lamps, work at 44 – 50 kHz so that the lamps normally do not flicker. In reality, however, things are a little different. While a higher switching frequency is used, the input capacitors are to small for cost reasons. This causes the high frequency circuit in the lamp to be supplied with a strongly pulsating voltage. This pulsation creates a brightness modulation in the emitted light which is why these lamps often have a rather high level of flicker at 100 Hz.
Features:
- Input: input voltage range: 100-240Vac, max input voltage range: 100-347Vac.
- Output: output power range: 24W-30W; output voltage range: 25-40Vdc.
- Active power factor correction, high PF (PF> 0.95 at 230Vac), low THD (THD <15%), the efficiency can up to reach 91%.
- Flicker-free coefficient<0.4%.
- Meet the ERP standards after being installed inside finished LED lights.
- Open circuit, short circuit and over temperature protections.
- Surge level: 2KV.
- Structure: IP20 (screw terminal version).
- Warranty: 5 years
- Applications: LED down lights, panel lights, grid lights, track lights and etc.
- Input voltage:100-277V AC, 47 to 63Hz
- Output specifications (a):
- 1)25-40Vdc 600mA 24.00W
- 2)25-40Vdc 650mA 26.00W
- 3)25-40Vdc 700mA 28.00W
- 4)25-40Vdc 750mA 30.00W
- 5)25-40Vdc 1100mA 44.00W
- 6)25-42Vdc 1300mA 54.60W
- 7)25-40Vdc 1500mA 60W
- 8)25-40Vdc 2000mA 80.00W
- Conversion efficiency: 90% at 220Vac
- Power factor: 0.97 at 220Vac
- Ripple voltage: ≤1V
- Current tolerance: ±5%
- Protective functions: open-circuit and short-circuit
- Operating temperature: -30 to 50°C
- Humidity: 20 to 90% RH
- MTBF calculation: up to 50,000 hours lifespan
- Certificate: CE, CB, TUV, RCM certified
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ShenZhen Fahold Electronic Limited , https://www.fahold.com