consumer HD format announcement press release

Discussion in 'Professional Video Production' started by Bill Ball, Jul 5, 2003.

  1. Bill Ball

    Bill Ball Guest


    Proposal of Basic Specifications for HDV (Tentative Name) Format
    That Realizes Consumer High- Definition Digital Video Recording

    Canon Inc.
    Sharp Corporation
    Sony Corporation
    Victor Company of Japan, Limited (JVC)

    Tokyo, July 04, 2003 - Canon Inc., Sharp Corporation, Sony
    Corporation, and Victor Company of Japan, Limited (JVC) today
    announced a joint proposal of basic specifications for "HDV"
    (tentative name) format which realizes recording and playback of
    high-definition video on a DV cassette tape. The HDV format includes
    720p (progressive) and 1080i (interlace) specifications, and enables
    the development of products conforming to the global high-definition
    infrastructure. The four companies will actively promote the
    specifications throughout the industry and plan to finalize the
    specifications around September 2003.

    BS digital high-definition broadcasting, which started December 2001,
    and digital terrestrial broadcasting scheduled to commence in December
    2003 have increased anticipation toward the expansion of
    high-definition broadcasting in Japan. Growing sales of
    high-definition television sets and the introduction of digital
    high-definition video recorders, such as D-VHS and Blu-ray Disc
    recorders, have enriched customer enjoyment of high-definition video
    in the home.

    The HDV format specifies the data recording of MPEG2 compressed
    high-definition signals based on the DV format, which is
    internationally accepted as a consumer digital VCR format. Because the
    new format employs the same cassette case, tape speed, and track pitch
    as the DV format, it can utilize mechanical parts based on the DV
    format. It also makes it easy for manufacturers to undertake the
    development of products that are highly compatible with the DV format.

    The 720p specifications in the HDV format are the same specifications
    as adopted in the "GR-HD1" high-definition digital video camera which
    JVC introduced to the market in March 2003. By adopting both the 720p
    and the 1080i specifications, the HDV format will enable users to
    record high-definition video and further disseminate the enjoyment
    realized of high-definition video.

    The HDV format records both video and audio through compression by
    MPEG encoding. Video signals are compressed by MPEG2 encoding
    (inter-frame compression) as BS digital broadcasting, making possible
    the recording and playback of high-definition video at a bit rate
    equivalent to the DV format SD (standard definition) specifications
    (intra-frame compression.) Audio signals are digitized with a
    48kHz/16-bit quantization sampling frequency and compressed to 384kbps
    by MPEG1 Audio Layer II encoding.

    <HDV Format Key Characteristics>

    1) Ability to record and play back high-definition video on
    internationally accepted DV format cassette tapes

    2) Adoption of 720p/1080i formats to comply with progressive and
    interlace specifications for high- definition recording and playback
    The HDV format complies with both the 720 scanning lines
    (progressive)/1280 horizontal pixels 720p format (60p, 30p, 50p, 25p),
    and the 1080 scanning lines (interlace)/1440 horizontal pixels 1080i
    format (60i, 50i). This ensures the recording and playback of
    high-resolution video for the high-definition era.

    3) Improved error correction
    By changing the error correction method from error correction within a
    track, as specified in the DV-SD format, to error correction among
    multiple tracks, the HDV format offers improved error correction
    capability and enhanced resistance to lost data caused by dropout.

    4) Data for special playback
    Video signals compressed by MPEG encoding do not support image display
    during special playback such as fast search. The HDV format records
    specific data for special playback on a dedicated tape, enabling the
    display of video images during special playback such as fast search or
    slow-motion playback. (Video image quality during special playback
    will differ from that during normal playback.)

    <HDV Format Main Specifications>
    Media Same as DV format (DV and/or Mini DV cassette tape)
    Video Signal 720/60p, 720/30p 720/50p, 720/25p | 1080/60i, 1080/50i
    Number of Pixels 1280 X 720 | 1440 X 1080
    Aspect Ratio 16:9
    Compression MPEG2 Video (profile & level: [email protected])
    Sampling Frequency for Luminance 74.25MHz | 55.7MHz
    Sampling Format 4 : 2 : 0
    Quantization 8 bits (both luminance and chrominance)
    Bit rate after Compression Approximately 19Mbps | Approximately 25Mbps
    Compression MPEG1 Audio Layer II
    Sampling Frequency 48kHz
    Quantization 16 bits
    Bit rate after Compression 384kbps
    Audio Mode Stereo (2 channels)
    Data Format MPEG2 Systems
    Stream Type Transport Stream Packetized Elementary Stream
    Stream Interface IEEE1394 (MPEG2-TS)
    Bill Ball, Jul 5, 2003
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