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Optibase Ltd. (OBAS) Message Board

  • mikhail_gorbachev_1 mikhail_gorbachev_1 Mar 22, 2002 6:01 PM Flag

    Expect Good Things here with OBAS


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    • i_hunt_big_coffin_hunters i_hunt_big_coffin_hunters Mar 24, 2002 2:26 PM Flag

      Object-based video coding challenges MPEG

      By Junko Yoshida

      EE Times
      March 22, 2002 (8:51 p.m. EST)

      PARIS � Has MPEG had its day? A Milpitas, Calif. startup will argue in the affirmative Monday (March 25) when it announces an object-based video coding algorithm that it calls a radical departure from the block-based coding used in all MPEG standards. Scheduled for private previews in Las Vegas next month at the National Association of Broadcasters' (NAB) convention, Pulsent Corp.'s technology � and a host of similar developments both inside and outside the Moving Picture Experts Group � could ignite debate as the industry looks beyond the current slate of standards for digital video compression.

      Indeed, Pulsent will hardly be alone in showing improved compression algorithms at NAB. The convention will highlight advances in a host of proprietary and standards-based schemes from such entities as Apple Computer, DemoGraFX, DiVX, iVast, Microsoft Corp., On2 (formerly Duck Corp.) and RealNetworks. Like the Pulsent algorithm, many of the evolving coding technologies � including block-based H.26L, elements of which are being incorporated into a next-generation variant of MPEG-4 � target broadcast-quality video at 1.5 Mbits/second or slower.

      At issue is whether the market will be willing to abandon some current infrastructure investments for the sake of increased coding efficiency.

      Pulsent believes "the next huge jump in coding efficiency must come from a new discipline," even if it defies conventional wisdom and the existing infrastructure, said chief executive officer Adityo Prakash. "MPEG has done a good job squeezing more out of the existing technology, but we feel that block-based video coding has reached its limits." Rather than rely on block-based motion compensation to predict the next frame, Pulsent's scheme uses an object in one frame to model itself in subsequent frames.

      But object-based coding has its detractors

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