AHD/TVI/CVI/CVBS to HDMI/VGA/CVBS conversion solution description

The basic specifications of this program are as follows:

Input signal support:

AHD: 100W(25/30) 200W(25/30) 400W(15/25/30) 500W(12/20)

TVI: 100W(25/30) 200W(25/30) 300W(18) 400W(25/30) 500W(12/20)

CVI: 100W(25/30) 200W(25/30) 400W(25/30)

CVBS: (PAL:720x576i 25Hz or NTSC:720x480i 30Hz)

Output signal support:

CVBS signal output (PAL:720x576i 25Hz or NTSC:720x480i 30Hz)

VGA signal output (1280x720P 60Hz or 1920x1080P60Hz)

HDMI signal output (1280x720P 60Hz or 1920x1080P60Hz)

Connector function definition: (subject to the latest PCB document of Chipav)

P4: HDMI output

P2: VGA output

P3: CVBS output

S1: Switch output channel

S2: Switch output resolution

D3: HDMI output indicator

D4: VGA output indicator

D5: CVBS output indicator

P1: Analog high-definition signal (AHD/TVI/CVI/CVBS) input

D2: Power indicator

P5: Power input 5/12V

Instructions:

Before the PCB solution board is powered on, first connect the analog HD lens to the P1 interface through a coaxial cable, and then connect the P4/P3/P2 interface according to your own output requirements (can be connected at the same time, but cannot be output at the same time, each time only

The S1 button can be used to select the channel to be output, and the default HDMI output.) Finally, connect the board to the DC5/12V power supply to light up and work.

Chipav provides sets of films:

This solution consists of four main chips, and the process is as follows:

TP2826: Decodes AHD/TVI/CVI/CVBS signals, and outputs internally synchronized BT656 digital signals.

CV2880: Convert the digital signal decoded by TP2826 to CVBS/VGA signal.

HC32F005: The controller of the overall scheme.

CV8788: Encode the digital signal output by CV2880 into HDMI signal.