RN6752 CVBS转BT656/601 支持720P,1080N，替代GM7150BC，CJC5150，TVP5150等AHD芯片

Tel18218088355视频转换方案

于 2017-07-17 11:34:24 发布

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文章标签： RN6752 CVBS转BT6566011302 AHD芯片 GM7150BC替代芯片视频解码芯片

本文链接：https://blog.youkuaiyun.com/wode1212008/article/details/75221699

RN6752是一款高性能的单通道高清视频解码芯片，能以4x过采样率数字化视频信号，支持从CVBS到720P、1080N的转换。该芯片内置10位ADC，具有自动增益控制和锁定相位的低抖动锁相环，确保信号质量。此外，它还具备自动检测NTSC/PAL或AHD1.0信号的能力，并提供2D 5线梳状滤波器减少图像噪声。RN6752的数据端口可编程以适应不同的视频分辨率，如D1或更高的720p、1080N，并通过I2C接口进行参数调整。

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General Description

RN6752 is a feature rich, high quality 1-channel HD video decoder chip, in which the integrated 10-bit ADC with a maximum sampling rate of 72MHz is used to digitize the video signal at 4x over-sampling rate. The associated Clamping and automatic gain control (AGC) circuit hold the AC coupled signal to a DC level as well as set the signal gain for maximum signal dynamic range before digitization. The analog front-end (AFE) with automatic gain control (AGC) can accept an input signal ranging from 250mV to 1.3V and allows signals from the source directly applied to the decoder input without going through extra gain/attenuation stage. The accurate color carrier phase acquisition is achieved by the low jitter phase lock loop (PLL).

With an improved and robust sync processing circuit, horizontal and vertical SYNC pulses can be correctly extracted from a CVBS, AHD1.0, 1080N, or luminance (Y) signal. Workin