Hi, i have noticed for a long time that the c-series does not work well with most of the LCD's because it does not support CEC, only DPMS.
This makes the c-series unable to wakeup the monitor from standby mode.
Has there been any changes in the c-series that allows one to use CEC?
Here is a thread about this:
ps. there are some really nice LED-LCD displays on the market that could be used but only support CEC.
Just a note, some manufacturers are overclocking the refresh rate on their displays, to 120KHz or 240KHz instead of 60KHz. When they do this it introduces a delay into the audio stream, effectively destroying the ability of the acoustic echo canceller to do it's job. When this happens you will notice an echo when using the HDMI based audio. You can resolve this issue by using external speakers, playing around with the settings on the disply or replacing the display with a commercial display, not a consumer display.
Here is a note directly from the Cisco C series admin guide on this issue:
New consumer TVs are usually equipped with “Motion Flow” or similar technology to insert new video frames between standard frames to create smoother images. This processing takes time and to maintain lip synchronization, the TV will delay the audio so that the audio and video arrives at the same time.
The echo canceller in the Cisco endpoints can handle such delay up to 30 ms. Many consumer TVs are not made for real time video communication and may introduce more than 30 ms of delay.
If you use such a TV together with a C-series codec it is recommended that you turn off “Motion Flow”, “Natural Motion” or any other video processing that introduces additional delay.
Some consumer TVs also support advanced audio processing like “Virtual Surround” effects and “Dynamic Compression” to improve the TV experience. Such processing will make any acoustic echo canceller malfunction and should hence be switched off.
Some monitors are equipped with a setting called ‘Game Mode’. This mode is specifically designed to help reduce the response time and will usually help to reduce the delay.
I am also searching for this mythical list of Cisco Webex Approved Displays (Monitors).
I've been told by my team lead that certain LG and some Samsung displays are Cisco Approved, but I can't seem to find any information in these forums, in the data sheets, installation manuals, user guides, etc....
I'm going to have to open a ticket to get a response I think.
My team lead found the link we've all been looking for.
The information is inside the software release notes on PAGE 100:
All the best everyone!