TW6869-TA1-CRH

The main function of the TW6865 as described in the datasheet is to support motion detection for each of the 8 video decoders. The TW6865 uses a built-in motion detection algorithm that compares the difference in luminance level between the current and reference field to detect motion accurately. It provides sensitivity and velocity control parameters for each motion detector to adjust motion detection according to the required situation. Additionally, the TW6865 supports a manual strobe function to update motion detection for user-defined motion sensitivity control. When motion is detected in any video inputs, the TW6865 updates its motion status registers, allowing the host processor to read the motion information. Furthermore, the TW6865 also includes an audio codec composed of 8 audio analog-to-digital converters, an audio mixer, and an audio detector. It can accept 8 analog audio signals and produce 8-channel digital audio data. The audio input signals can be adjusted individually by internal programmable gain amplifiers and then sampled by each analog-to-digital converter. The TW6865 can mix all analog audio inputs based on predefined mixing ratios for each audio channel, and the mixed audio output can be transferred through the PCIe interface.

The TW6865 can simultaneously decode and transfer 4 real-time D1 videos.

The TW6865's DMA controller has features such as INT_STATUS register description, bad incoming data format flags for video input, and control parameters for motion detection sensitivity and velocity. It also supports manual strobe function for motion sensitivity control and updates motion status registers for the host processor to read the motion information. Additionally, it optimizes PCIe x1 bandwidth for high throughput video and audio data transfer.