The following information is true and accurate at the time of publication.
Proposal of Basic Specifications
for HDV (Tentative Name) Format
That Realizes Consumer High- Definition Digital Video Recording
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
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
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
<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>
DV format (DV and/or Mini DV cassette tape)
|Number of Pixels
||1280 X 720
||1440 X 1080
(profile & level: MP@H-14)
4 : 2 : 0
8 bits (both luminance
|Bit rate after Compression
MPEG1 Audio Layer
|Bit rate after Compression
Stereo (2 channels)