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VIDEO STATISTICAL MULTIPLEXING OVER MULTIPLE FREQUENCY CHANNELS

IP.com Disclosure Number: IPCOM000250391D
Publication Date: 2017-Jul-10

Publishing Venue

The IP.com Prior Art Database

Related People

Gabriel Bouvigne: AUTHOR [+3]

Abstract

Video statistical multiplexing over multiple transponders allows optimizing spectrum usage of high bit-rate digital video services due to a statistical distribution of the sub-streams' data over several independent transmissions channels (multiplexes, transponders). Optimization results from the use of statistical multiplexing, and in particular multiplexing over several transmission channels. Recent tuning technologies allow a large amount (commonly 32) of transmission channels to be acquired simultaneously by the receiver, opening up the possibility to multiplex several digital video services over several transmission channel. This allows for a greater bandwidth efficiency than possible with classical statistical multiplexing over each single channel. The system and methods presented herein provide for appropriate signaling to allow the receiver to easily recombine sub-streams' data collected from several transmission channels into a single digital video service.

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Copyright 2017 Cisco Systems, Inc. 1

VIDEO STATISTICAL MULTIPLEXING OVER MULTIPLE FREQUENCY CHANNELS

AUTHORS: Gabriel Bouvigne

Jie Wang Pierre Joly

CISCO SYSTEMS, INC.

ABSTRACT

Video statistical multiplexing over multiple transponders allows optimizing

spectrum usage of high bit-rate digital video services due to a statistical distribution of the

sub-streams’ data over several independent transmissions channels (multiplexes,

transponders). Optimization results from the use of statistical multiplexing, and in

particular multiplexing over several transmission channels. Recent tuning technologies

allow a large amount (commonly 32) of transmission channels to be acquired

simultaneously by the receiver, opening up the possibility to multiplex several digital video

services over several transmission channel. This allows for a greater bandwidth efficiency

than possible with classical statistical multiplexing over each single channel. The system

and methods presented herein provide for appropriate signaling to allow the receiver to

easily recombine sub-streams’ data collected from several transmission channels into a

single digital video service.

DETAILED DESCRIPTION

On transmission channels with limited bandwidth, such as a satellite transponder

or cable frequency channel, where several Digital TV services are carried simultaneously,

as a so-called transport stream, a common way of optimizing the use of the scarce resource

is to statistically multiplex several TV channels together over time. That is, the

communication channel is split into a random range of variable bit-rate data streams

(making up the components of the digital channels). The link sharing is tailored for the

instantaneous traffic requirements of the data streams which are transmitted over every

channel.

Copyright 2017 Cisco Systems, Inc. 2

The more channels multiplexed together, the greater the quality improvement.

However, the move toward 4k Ultra-High Definition TV (UHDTV) encoding prevents the

use of efficient statistical multiplexing, as a single transponder can at best carry 2 4k

channels, even with High Efficiency Video Coding (HEVC) encoding at 8 bits and standard

frame rate (25/30 frames/s). In addition, the industry of Digital TV (DTV) is not stopping

with providing only UHDTV quality. Experimentations are being explored for new

technologies that help to improve the audio/video qualities and services. Examples include:

HDR 10 bits, higher frame rate (50/60 frames/s and even 100/120 frames/s), 8K DTV,

NGA (next generation audio with object based coding), multiple view, VR etc., each of

such resolution improvement will need additional bandwidth for the transmission. Of

course, the efficiency of the video and audio codecs as well as that of the channel coding

will continuously increase in parallel, but the pace of the improvement will not be sufficient

to compensate for the needs of resolution progress. This will further limit the number of

TV channels allowed in a single tran...