VQE

What is VQE? Visual Quality Experience (VQE) Application offers service providers a set of technologies and products associated with the delivery of IPTV video services. VQE is designed to improve the quality of IPTV services and subscribers’ viewing experiences. VQE is part of a Cisco end-to-end solution that builds video awareness into the network infrastructure. For Cisco VQE, Release 3.5, VQE technology is intended for wireline operators who offer managed broadcast (multicast) IPTV services using xDSL IPTV subscribers expect high video quality. Because many subscribers are migrating from existing analog or digital cable services, their quality expectation has already been set. To attract subscribers, IPTV providers must meet or exceed the video experience of existing services. VQE technology and products provide that capability. Video is less tolerant of network factors such as jitter, delay, and especially packet loss because a single IP packet carries up to seven MPEG transport frames. Therefore, IP networks require additional functionality to deliver the video quality expected by subscribers. The accepted industry benchmark for quality is to deliver a maximum of one video “artifact” or perceived distortion during the viewing of a one-hour movie. This level of quality translates into a network-layer requirement of a loss of fewer than 7.8E-7 video packets. Most xDSL networks are not optimized to deliver such low levels of packet loss. VQE Improvement Services: Unicast Retransmission—Optimized, selective retransmission of dropped IPTV packets caused by noisy DSL lines or errors in the home network caused by poor quality wiring. The set-top box (STB) receiver, the VQE Client (VQE-C), sends NACK packets to the VQE-S to request retransmission of the lost packets. •Forward Error Correction (FEC)—Extra information is sent along with the video data at the application layer. The additional information is used by the VQE-C on the STB to detect and correct lost packets. •Rapid Channel Change (RCC)—When the subscriber requests a channel change, the VQE-C on the STB sends the VQE-S a request for the new channel’s IPTV packets. The VQE-S sends the VQE-C an optimized unicast burst of IPTV packets and other channel information from the VQE-S’s cached video data for the new channel. This greatly reduces the time needed to display the new channel. •IPTV Packet Loss Monitoring—Facilities such as VQE-S RTCP Exporter help operators measure, baseline, and pinpoint problem areas of the video infrastructure, including transmission lines and home networks. ****** Did you enjoy the video? If so, give it a like above! Subscribe to our channel for more techie video 👉 https://www.youtube.com/c/DeepakRai?sub_confirmation=1 Keep Learning!! Keep Growing!! P.S. Make sure to keep up with us by clicking the bell!