TSER953: Question about TSER953

Hello Darrah：

Thank you for your reply. The customer's demand is to support 50M. In theory, as you replied, it should have nothing to do with pixels. It is the process of serial deserialization, and pixels are also data. Therefore, the customer thinks that it should be able to meet the demand. However, the terminal and TI's fae say that they can only support 400w pixels, and cannot support 50m cameras, because the data is transmitted frame by frame, and the bandwidth is only 4m, which is not enough. At present, there is no serdes that can support more than 10m, so I want to Then double confirm with you, whether this chip can support a 50M pixel camera or not.

If it is an 8bit image, 50 million*(R)8*(G)8*(B)8*1fps/(1024*1024*1024)=1.11Gbps
Tser953, 4lane can transmit 4.16Gbps
80% of the theoretical value is also 3.328Gbps.
I don't know if there is something wrong with the algorithm?

Specifically, I would like to ask you about it. The demand is to collect 50M raw pictures. According to your previous formula, if it is an 8bit image, 50 million*(R)8*(G)8*(B)8*1fps/(1024*1024*1024)=1.11Gbps is theoretically possible. Please help to see if there is any problem with this calculation, and whether it can be transmitted in this way. Thanks！！！

Hello,

The pixels are relevant to determining if a certain camera can be supported. In the equation,

Video Throughput = HActive x VActive x (Frame Rate) x Bits-Per-Pixel x Overhead (Assume 25% if unknown)

HActive refers to the number of horizontal active pixels, VActive refers to the number of vertical  active pixels, the frame rate is the frames per second, bit-per-pixel is specific to the data type, and overhead refers to all CSI overhead and video blanking lines. Each of these variables depend on the specific imager and configuration of the entire system. In order to determine if a certain camera can be supported each of these variables need to be taken into account. 

For example, if a camera with a resolution of 1920x1080 and 30fps using RGB888 (24 bits per pixel data type) the total throughput would be:

1920*1080*30*24*1.25 = 1.866Gbps

Since 1.866Gbps is within the 3.328Gbps bandwidth limitation of the TSER953 this would be supported. Without the specific details of the camera, this equation can't be calculated, but given that 50MP is quite a large resolution, it is likely that the TSER953 will not be able to support that large of a bandwidth. Additionally, while the TSER953 does use a 4.16Gbps line speed, only 3.328Gbps is available for transmitting the video data. The rest of the bandwidth is used for additional data such as GPIO, I2C, diagnostics, etc. so the total video data being transmitted must remain under 3.328Gbps.

Jimmy Huang said:

50 million*(R)8*(G)8*(B)8*1fps/(1024*1024*1024)=1.11Gbps

What is the 1024 representing in your calculations? This calculation does not appear to be following the bandwidth equation from above. To calculate bandwidth, please use the equation listed above.

Hello Darrah：

1024 is a unit conversion
The customer's bandwidth equation is: 8192*6144*1*24*1.25=1.51Gbps
Among them, what is taken is a photo, not a video, so it is a frame
Also, I would like to ask, how many meters can the extension distance be? Is 1.5 meters ok?

Thanks！！！