Why do I see pink or green patches in my video stream with Codian products?

Introduction

This article relates to the Cisco TelePresence MCU 4203, Cisco TelePresence MCU MSE 8420, Cisco TelePresence IP VCR 2210, Cisco TelePresence VCR MSE 8220, Cisco TelePresence ISDN GW 3241, Cisco TelePresence ISDN GW MSE 8321, Cisco TelePresence IP GW 3510, Cisco TelePresence MCU 4505 and Cisco TelePresence MCU MSE 8510 products.

Q. Why do I see pink or green patches in my video stream with Codian products?

A. Pink and green patches or lines seen in decoded video are often the result of packet loss or incorrect data in the video stream. Many video codecs (including H.261, H.263 and H.264) use the Y'CbCr system to represent color space, where Y' is the 'luma' (brightness) component and Cb and Cr are the blue and red chroma components respectively. For many Y'CbCr values there is no equivalent RGB value and the colour seen on the display depends on the details of the algorithm used. A Y'CbCr value of (0,0,0) is often converted into the green color while a Y'CbCr value of (255,255,255) leads to a pink color. These colours may appear similar to those shown below.

If you encounter the symptoms described above, follow normal packet loss and network troubleshooting procedures.

Related Information

• Technical Support & Documentation - Cisco Systems