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IPTV top-set box of implementing seamless switchover watching analog TV.

A technology of seamless switching and analog TV, applied to color TV parts, TV system parts, TV, etc., can solve the problems of cumbersome and complicated operation, and achieve the effect of convenient operation and simplified operation

Inactive Publication Date: 2007-10-03
SHANGHAI DAREGLOBAL TECHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to watch analog cable TV on the existing IPTV set-top box, you need to switch the TV signal input, and the operation is cumbersome and complicated

Method used

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  • IPTV top-set box of implementing seamless switchover watching analog TV.
  • IPTV top-set box of implementing seamless switchover watching analog TV.
  • IPTV top-set box of implementing seamless switchover watching analog TV.

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Effect test

Embodiment Construction

[0016] The IPTV set-top box for realizing seamless switching and watching analog TV will be described in detail below.

[0017] 1. Select the main chip of the IPTV solution, and draw the schematic diagrams of the required circuit units. The analog tuner 1 is connected to the main chip 5 through the A / D converter 3, and the analog tuner 1 is connected to the A / D converter 3 as shown in Figure 4:

[0018] (1) A resistor needs to be added between the analog video output of the analog tuner 1 and the video A / D converter 31 for impedance matching.

[0019] (2) A capacitor C needs to be added between the analog audio output of the analog tuner 1 and the audio A / D converter 32 to remove the DC component.

[0020] (3) The analog tuner 1 may not have a dedicated pin for output grounding, and the fixed pin on the metal case needs to be grounded.

[0021] 2. The peripheral circuit of analog tuner 1 is shown in Figure 5:

[0022] (1) VCC3 and VCC2 on the analog tuner supply power to di...

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PUM

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Abstract

This invention relates to an IPTV set-top box realizing seamless switch for watching analog TV, in which, the hardware system is composed of an anolog radio-frequency head, a RJ45 network interface, a D / A converter, a MAC controller and a PHY, a main system chip, a FLSH storage, a DDR storage and an audio / video output port, and the main chip exchanges data with the RJ 45 network interface by the MAC controller and PHY to realize the ordinary function of IPTV set-top box, one end of the analog radio-frequency head is connected with an analog wire TV socket, the output of which is converted into digital signals by audio / video A / D to be input into the main chip, which carries out video process to the digital signal then to be output on a TV display terminal via the audio / video output port to realize seamless switch of analog TV since network input, local storage and analog TV input are output via the audio / video output port.

Description

technical field [0001] The invention belongs to the technical field of television auxiliary equipment, and in particular relates to an IPTV set-top box which can directly watch ordinary cable analog TV programs without switching TV signal sources, and realize seamless integration with network TV. Background technique [0002] Normally, an IPTV set-top box can only watch Internet TV, or Internet TV plus digital cable TV. At present, digital TV is not very popular in China and most underdeveloped countries, and analog TV still occupies a considerable proportion. If you want to watch analog cable TV on the existing IPTV set-top box, you need to switch the TV signal input, and the operation is cumbersome and complicated. The invention integrates the analog tuner into the IPTV set-top box, and through software control, the user can directly operate the set-top box to realize the seamless switching between the wired analog TV and the network TV, which greatly simplifies the user'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/00H04N5/44H04N21/43
Inventor 颜昌林肖雄
Owner SHANGHAI DAREGLOBAL TECHNOLOGIES CO LTD
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