UBLive-264MP：基于TI DM642的H.264视频广播应用解决方案

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UBLive-264MP：基于ti DM642的H.264视频广播应用解决方案

UBLive-264MP: An H.264-Based Solution on the DM642 for Video
Broadcast Applications

Broadcast video applications are currently undergoing a transition where more and more content is produced
and diffused in digital format as opposed to the traditional analog format. The transition is fuelled by the
flexibility digital video offers in handling video content at all stages from production to transport/storage to
decoding/display. The infrastructure needed to enable this “digital” transformation is being put in place at a
rapid pace, allowing both content providers and service providers to significantly expand their market reach
over the next few years.
Service providers in the broadcast industry face an unprecedented competition for viewers. In a landscape
that was previously dominated by the cable industry, satellite and Digital Subscriber Line (DSL) companies
are now also competing for the same customers. The competitive landscape is driving service providers to
develop ways to differentiate their services and to adopt new solutions for the production and delivery of
digital video. Customers would like to receive more channels for a given service, implying the need for a
more efficient use of the available transmission bandwidth. At the same time, consumers are becoming more
demanding in terms of the video quality they expect to see on their TV monitors, requiring sophisticated
video pre-processing at the broadcasting side. Despite their increasingly stringent video quality requirements,
customers still demand that the cost of service be as low as possible.
MPEG-2 Part 2 is currently the visual coding standard of choice for the broadcast video industry, operating at
bit rates from around 3 to 10 Mbps. The emerging H.264 visual coding standard is set to revolutionize this
industry by presenting a viable alternative to MPEG-2 video. H.264 allows encoders to achieve more than
50% savings in bandwidth as compared to MPEG-2, hence its strong value proposition. However, H.264 is a
substantially more complex standard than MPEG-2 video, and both the H.264 encoders and decoders are
expected to be much more demanding in terms of computations and memory than the MPEG-2 counterparts.
Moreover, being in the last phase of development, H.264 has still not been fully tested, implying that further
technical changes might be needed before the specification is deemed to be final.
UBLive-264MP, UB Video’s H.264-based video processing solution on Texas Instruments’ TMS320DM642
digital media platform for the broadcast video market, addresses in an effective way all of the above
problems. UBLive-264MP achieves excellent video quality at rates as low as 1 Mbps through motioncompensation
filtering, effective use of the H.264 Main-Profile standard features, and subjective-quality
optimizations. UBLive-264MP is not only algorithmically optimized, but is also extensively optimized for
the fully programmable (low-cost) DM642 digital media processor, which allows fast updating of the
software as H.264 is being finalized.
The objective of this paper is to introduce UBLive-264MP as well as explain the benefits it offers to the fastchanging
broadcast video market. An overview of the broadcast video market is first presented, followed by
a presentation of the emerging H.264 Main-Profile standard. The video-related challenges that are facing the
broadcast digital video market are then discussed, followed by a detailed description of UBLive-264MP, as
well as a discussion of UB Video’s current UBLive-264MP demonstration software.

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