Release Notes

12
Release Notes for Cisco TelePresence System Software Release 1.10
Important Notes for 1.10.x Releases
Note that Long-Term Reference Picture (LTRP) frames are not used for presentation video.
• Blurred Motion for Moving Objects (Motion Handling)
Motion handling defines the degree of compression within the encoding algorithm to either enhance or
suppress the clarity of the video when motion occurs within the image. High motion handling results in
a smooth, clear image even when a lot of motion occurs within the video (people waving their hands, for
example). Low motion handling results in a noticeable choppy, blurry, grainy, or pixelized image when
people or objects move.
Cisco TelePresence provides you with a way to customize the motion handling. Although the Cisco
TelePresence cameras can operate at a resolution of up to 1080p with a maximum frame rate of 60 frames
per second (1080p 60), the codec can encode and compress the video into either 1080p or 720p
resolutions at three different motion-handling levels per resolution providing you with the flexibility of
deciding how much bandwidth is available in your network.
Instead of a sliding scale, Cisco uses the terms Good, Better, and Best. Best motion handling provides
the clearest image and uses the most bandwidth. Good motion provides the least-clear image and uses
the least bandwidth. For more information, refer to the “Understanding How Endpoints Determine fps
and Video Quality” section of the “TX Software Features” chapter of the Administration Guide for Cisco
TelePresence Software Release TX 6.
Low motion handling (for example, a hand wave leaving streaks or tracks for a few seconds on the
screen) has also been seen under the following circumstances:
– Under certain lighting conditions (for example, the light from an upper fixture leaving a shadow
on a participant). Some lighting conditions cause low motion handling when the codec applies
auto-correction to the broadcast image.
– Using certain wall colors (tan or light brown)
– Networks with high latency; any latency in your networks can lower the motion handling
– Networks with a lot of jitter or dropped packets
• Choppy or Distorted Music or Other Continuous Sound when Sharing Presentation Audio
Immersive Cisco TelePresence systems use an Acoustic Echo Canceler (AEC) to make human speech
sound as clear as possible for the best possible collaboration experience.
Any sound that is continuously played (such as music) as the audio portion of a presentation can sound
choppy or distorted during a Cisco TelePresence conference. To remove echo, AEC changes the loudness
of the audio coming from the system loudspeaker when it detects sound locally (on the near end). When
the loudspeakers are playing presentation audio, this change in loudness may lead to noticeable
choppiness or distortion.
Muting the system microphones on both the near and far end can reduce the AEC effects when you share
presentation audio; however, any endpoint that is not muted will still experience the same choppiness
and distortion.
• System Behavior During Times of Network Congestion
Anything that degrades network performance can affect the function of your Cisco TelePresence system.
This sources of the network degradation can include, but are not limited to, the following:
– Administrative tasks such as an internal port scan or security scan
– Attacks that occur on your network, such as a denial-of-service attack
These network disturbances can affect the voice and/or video quality of a Cisco TelePresence
conference, and in some cases, can cause the call to drop. To reduce or eliminate any adverse effects to
a TelePresence conference, schedule any administrative network tasks during a time when the
Cisco TelePresence system is not being used, or exclude TelePresence systems from the testing.