Tag Archive: HEVC

HEVC REVOLUTIONIZES UHDTV ON DVB PLATFORMS AT IBC

Following the approval in July of the specifications for the use of HEVC in the DVB environment and DVB-UHDTV Phase1, which was seen as a significant step in the road to Ultra High Definition TV services, DVB continues to make progress towards the next phase in the UHD standardization process.

At this year’s IBC, DVB’s main concentration will be to demonstrate how the coding efficiency of HEVC can be used to increase the capacity of the DVB-T2 terrestrial platform as well as for the new DVB-S2X satellite standard. Utilizing HEVC encoding, multiple UHD services will be delivered using DVB-S2X and multiple HD channels over DVB-T2.

The DVB-S2X demonstration will highlight the new standard that offers spectral efficiency of up to 50% for professional applications. S2X will be implemented with HEVC to deliver 4 UHD signals at a data rate of 100 Mbit/s. DVB-S2X provides more choices for roll-off factors as well as additional modulation and Forward Error Correction options that allow for the more efficient use of satellite transmission channels. It enables channel bonding of up to 3 satellite channels, which support higher aggregate data rates and allow for additional statistical multiplexing gain for services such as UHDTV.

In another demonstration up to 7 HEVC encoded High Definition channels will be delivered in one multiplex using DVB-T2 in a robust mode suitable for small indoor antennas and portable reception. Both fixed reception and mobile reception will be demonstrated.

www.dvb.org

via @videomageu

 

DVB-T2 first for Czech Republic

Ceske Radiokomunikace (CRa) has become the first company in Central Europe to undertake DVB-T2 tests with the new HEVC compression codec.

According to Michal Bures, who is heading up the Ultra HD trial for the Czech transmission company, they already show that it is possible to achieve savings compared to the current bitstream using MPEG-2.

This means that in future it will be possible to three TV channels in Ultra HD or 10 in HD on one DVB-T2 multiplex.

In the case of SD, it will be possible to distribute up to 40 channels, compared to the eight currently via a DVB-T MPEG-2 multiplex.

Marcel Prochazka, director of regulation and strategy at CRa, added that the migration to DVB-T2 with HEVC will enable the development of entirely new types of services for TV viewers.

Besides increasing the number of channels in higher quality, it will allow for mobile TV reception and the interconnection of TV with internet services.

It is assumed that DVB-T and DVB-T2 will operate in parallel with each other for several years, and negotiations as to when DVB-T2 can be introduced are currently being undertaken with the Czech Telecom Office (CTU).

The DVB-T2 tests are being undertaken with the support of Sony.

Source: broadbandtvnews.com

DVB-UHDTV Phase 1 specification gets approval

A significant step in the road to Ultra High Definition TV services was taken with the approval of the DVB-UHDTV Phase 1 specification at the 77 meeting of the DVB Steering Board. The specification includes an HEVC Profile for DVB broadcasting services that draws, from the options available with HEVC, those that will match the requirements for delivery of UHDTV Phase 1 and other formats. The specification updates ETSI TS 101 154 (Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream).

The new DVB-UHDTV Phase 1 will allow images with four times the static resolution of the 1080p HDTV format, at frame rates of up to 60 images per second.  Contrast will be drastically improved by increasing the number of bits per pixel to 10 bit. From the wide range of options defined in the HEVC Main 10 profile, Level 5.1 is specified for UHD content for resolutions up to 2160p. For HD content, HEVC Main profile level 4.1 is specified for supporting resolutions up to 1080p.

The DVB-UHDTV Phase 1 specification takes into account the possibility that UHDTV Phase 2 may use higher frame rates in a compatible way, which will add further to the image quality of UHDTV Phase 1.

“HEVC is the most recently developed compression technology and, among other uses, it is the key that will unlock UHDTV broadcasting,” said DVB Steering Board Chairman, Phil Laven. “This new DVB–UHDTV Phase 1 specification not only opens the door to the age of UHDTV delivery but also potentially sets the stage for Phase 2, the next level of UHDTV quality, which will be considered in upcoming DVB work,” he continued.

Content Identification & Media Synchronization For Companion Screens & Streams

Also approved at the 77th meeting of the DVB Steering Board was the specification for Companion Screens and Streams, Part 2: Content Identification and Media Synchronization. Companion Devices (tablets, smart phones) enable new user experiences for broadcast service consumption. Many of these require synchronization between the Broadcast Service at the TV Device and the Timed Content presented at the Companion Device. This specification focuses on the identification and synchronization of a Broadcast Service on a TV Device (Connected TV or STB and screen) and Timed Content on a Companion Screen Application running on a Companion Device. Part 2 outlines the enabling factors for the identification of, and synchronization with, broadcast content, timed content and trigger events on TV devices (for example a Connected TV or STB) and related content presented by an application running on a personal device.

MPEG-DASH Profile

Another specification to gain approval from the Steering Board was the MPEG-DASH Profile for Transport of ISO BMFF Based DVB Services over IP Based Networks. This specification defines the delivery of TV content via HTTP adaptive streaming. MPEG-DASH covers a wide range of use cases and options. Transmission of audiovisual content is based on the ISOBMFF file specification. Video and audio codecs from the DVB toolbox that are technically appropriate with MPEG-DASH have been selected. Conditional Access is based on MPEG Common Encryption and delivery of subtitles will be XML based. The DVB Profile of MPEG-DASH reduces the number of options and also the complexity for implementers. The new specification will facilitate implementation and usage of MPEG-DASH in a DVB environment.

The three new specifications will now be sent to ETSI for formal standardization and the relevant BlueBooks will be published shortly.

 

www.dvb.org