JVC Unleashing the Power of HDV and Progressive Scanning with Camcorders

Advantages of ProHD

1.HDV format

HDV is a video format designed to enable the recording of high definition MPEG-2 video on standard

DV media (DV or MiniDV cassette tape). The HDV format was defined by four companies: Canon Inc., Sharp

Corporation, Sony Corporation, and Victor Company of Japan, Limited (JVC). The specification of

the HDV format incorporates two versions, one progressive (720p) and the other interlaced

(1080i). HDV uses the same track pitch and tape speed as the DV format, and therefore the recording times are the same length as the DV format.

2.HD Progressive

(720p) format for high quality moving pictures and digital stills

Progressive scanning

The new ProHD products use the same progressive scanning system as used in all high-end HDTV cameras. Progressive scanning systems uniquely

capture and store full frames of image information. It is a very simple process to convert a progressive signal to interlaced, but not vice versa. When progressive recordings are frozen or

played in slow motion, each individual frame contains the full detail of the original image — excellent for viewing and analysing motion. Stills and prints captured from HD progressive video look far better than from interlaced video. In any case, today’s flat panel television displays and fixed matrix projectors, such as D-ILA, DLP and LCD, are all native progressive scanning systems. This means that JVC’s progressive HDV recordings can be displayed without imperfection, because they do not need to pass through the degenerative process of de-interlacing, prior to being displayed.

Multi-format output (BR-HD50)

Progressively scanned pictures are converted easily to the interlaced format by extracting the odd lines from progressive frame 1 and the even lines from progressive frame 2 to create the two fields required for each interlaced frame. Not only does the BR-HD50 output its native 720p, but also its built-in scan converter can generate 1080i and standard definition

signals. Converting the other way, to progressive from interlaced, presents a much greater technical challenge, requiring both

hardware and motion analysis software to achieve satisfactory results.

Blu-ray and HD-DVD compatible The IEEE 1394 connector provides a digital output for editing & recording and for direct transfer to the new generation DVD formats (Blu-ray and HD-DVD). ProHD camcorders and recorders, with their native MPEG-2 TS (Transport Stream), provide a recording signal which is easily transferred to these new DVD formats. This ensures no loss of picture quality.

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