are the same used in the delivery of HD video content.
HD Enabled Digital Cameras
HD cameras are been used by a growing number of film production companies. These types of cameras shoot video content up to five times the resolution of SDTV. The content from a HD camera typically gets digitally transferred to a server using fiber optic cable.
HDTV Servers
The HDTV server is connected via a high speed broadband network to an HD capable IP set-top box or a standard PC. Its main function is to digitally store HDTV content on a high capacity storage device.
Encoders
MPEG-2 encoders are the most common format for compressing SDTV. The processing of a high definition MPEG-2 video channel can use up to six times the amount of bandwidth of a standard channel. A number of telecommunication providers have limited bandwidth capacity on their networks to support MPEG-2 compressed high definition content. Therefore HD capable encoders play an important role in the HDTVenvironment and are responsible for achieving the best picture quality at the lowest bit rate. Most encoders used to deliver IP HDTV content are based on advanced encoding algorithms such as MPEG-4 and VC-1. These encoding technologies promise to deliver better video quality at lower bandwidth capacities.
A High Capacity IP Network
A HD video file can include up to five times the information of an SDTV file. Therefore, a high speed digital cable, satellite, DSL broadband, or terrestrial network with sufficient bandwidth capacity is required to transport HD content from the IPTV service provider’s data center to the HDTV home viewing system.
No comments:
Post a Comment