Tagged: JVC

HDV (2003 – 2011)

HDV was a high-definition digital video format for camcorders. Because of its high quality, it has been used for broadcast television as well as amateur video recording. JVC was the first company to release a HDV camcorder in 2003, with Sony and Canon producing camcorders later.

HDV video can be recorded at 720p and 1080p, sometimes referred to as HDV1 and HDV2 respectively.

Although special HDV tapes are available, their use was not required as the tape formulation (Metal Evaporate) is the same as standard MiniDV cassettes. One Sony camera could also use the large DV cassette format. HDV devices could usually play and record in DV format as well as HDV.

Accessories were available to allow HDV camcorders to record to non-tape media such as CompactFlash cards.

By 2011, Canon, JVC and Sony had discontinued their HDV products, and invested instead in fully tapeless formats such as XDCAM.

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D-VHS (1998 – 2007)

D-VHS was a later variant of VHS that recorded digitally, and was introduced in 1998. It was developed by the originator of VHS, JVC, along with Hitachi, Matsushita, and Philips.

D-VHS used MPEG recording, and could record in standard or high-definition.  There were several different recording speeds available, so a tape could have a variety of different capacities, for example a DF-300 tape that could hold 300 minutes at standard speed, could hold as much as 2100 minutes (35 hours) at LS7 (low speed, one seventh of the standard speed) if the machine was capable of using the very slowest speed. High-definition recordings reduced the capacity of the tape by half. Standard speed recordings had a higher bandwidth than DVD.

D-VHS tapes had a second hole on their underside that identified them to the recorder as being D-VHS tapes, and to record in D-VHS mode. Where the hole was missing, the machine would record in VHS or S-VHS format. VHS and S-VHS tapes could be played in the machine.

Unfortunately, sales of D-VHS recorders were poor, and so the price of them never fell greatly.

In 2002, a small number of pre-recorded D-VHS tapes were released under the D-Theater brand by four film-studios. However, despite being virtually identical to D-VHS, D-Theater tapes could only be played on D-VHS players with the D-Theater logo. D-Theater did provide much better video quality than DVD, at a time when high-definition formats such as Blu-Ray and HD-DVD were yet to be introduced.

The last D-Theater title was released in 2004, but D-VHS recorders were listed on the JVC website until 2007.

XRCD (1995 – )

XRCD (eXtended Resolution Compact Disc) was introduced by JVC in 1995. XRCD discs conform to Red Book standards and will play on any Compact Disc player, but claim to use much higher quality mastering and manufacturing processes to produce a sound as close as possible to the original master tape.

Subsequent versions of XRCD are called XRCD2 and XRCD24.

All versions of XRCD disc are encoded at 16 bits; the 24 in XRCD24 refers to the use of 24 bit encoding when digitising the original analogue source (XRCD and XRCD2 used 20 bit encoding of the original source).

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Super High Material CD (2007 – )

Super High Material (SHM) CD is a type of Compact Disc that uses an improved transparency polycarbinate resin as its transparent substrate, and this is claimed to provide a clearer medium for the reading of the data and so reduce read errors and improve the sound quality.

The polycarbinate resin was developed by JVC and Universal Music Japan during research into LCD manufacturing, and SHM-CDs began to be released in 2007.

SHM-CDs are fully compliant with the Red Book standards and play in any Compact Disc player.

Almost all of the releases have come from Japan, and have mostly been re-releases.

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Picocassette (1985 – late 1980s)

Picocassette (also know as the Dictasette) was an analogue audio tape format for dictation, introduced by Dictaphone in collaboration with JVC in 1985. It was used in the Dictaphone 4250 Voice Processor.

The tapes were approximately half the size of the older Microcassette, but with a tape speed of just 9 millimetres per second, each cassette could still hold up to 60 minutes of dictation. Only the later digital Sony NT had smaller cassettes.

The Dictaphone 4250 was a high-quality all metal-bodied device that was very expensive and was only produced for a few years.

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VHS (Video Home System) (1977 – late 2000s)

VHS (Video Home System) was a video tape cassette format developed by JVC, and was the most successful of the video tape formats for consumers, outlasting formats such as Betamax and Video 2000.

JVC began development of VHS in 1971, with 12 objectives in building a home video recording unit. In 1974, the Japanese Ministry of International Trade and Industry wanted to standardise on one consumer video format, and the preferred choice was Sony’s proprietary Betamax format, but pressure from JVC and Matsushita persuaded them to drop the push to standardise on a single format. JVC believed that an open standard, with the format shared among competitors without licensing the technology, was better for the consumer.

The first VHS recorder was available in Japan in 1976, and reached the UK in 1977.

A VHS cassette includes a flip-up cover that protects the ½-inch tape, and an anti-de spooling mechanism. Clear tape at both ends of the tape provide an optical auto-stop for the VCR transport mechanism. VHS machines pull the tape from the cassette shell and wrap it around the inclined head drum, using M-lacing, where the tape is drawn out by two threading posts and wrapped around more than 180 degrees of the head drum in a shape roughly approximating the letter M. The cassette can hold a maximum of around 430 m of tape, giving up to five hours playing time at standard play (SP) quality.

A smaller variant of VHS, VHS-C was introduced for use in camcorders. VHS-C tapes could be played in VHS machines with an adaptor.

In 1987, JVC introduced S-VHS, yielding 400 lines (compared to 240 for standard VHS), but this only had limited success. W-VHS was introduced in Japan in 1989, and allowed the recording of high-definition television, while D-VHS, which was the first digital variant of VHS, was introduced in 1998, but by this time DVD was available and after 2000, became the preferred method for pre-recorded video. The last major film to be released on VHS (‘A History of Violence’) was in 2006, and the last JVC VHS-only unit was produced in 2008.

VHS machines continued to be produced in Japan until 2016 by Funai Electric (who introduced the Compact Video Cassette format before switching to VHS in 1983) under brands such as Sanyo. Declining sales, and difficulties in obtaining components prompted Funai Electric to end production.

Although VHS was a popular format for long-play content such as films and television series, it was also used to deliver short-play content, such as music videos (sometimes in the form of Video singles), in-store videos and tutorials. VHS was also commonly included with various consumer products and services for demonstration purposes, or sent by manufacturers to service centres to demonstrate how to repair a new product.

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Preservation / Migration

Video CD (1993 – 2000s)

Video CD (Compact Disc Digital Video or VCD) was a derivative of the Compact Disc, used for playback of video. The standard was created in 1993 by Sony, Philips, Matsushita and JVC, and is referred to as the White Book standard.

Like audio Compact Disc, it uses 120 mm optical discs. Dedicated Video CD player were available, but most DVD and Blu-ray players, personal computers, and some video game consoles will play them.

The older CD Video format could only store analogue video and was limited in its capacity to just 5 minutes of video, but new digital compression techniques allowed 74 minutes of audio and video on a Video CD. Overall quality is similar to VHS.

Video CD had a brief period of success, and some major feature films were released on it (usually as a 2 disc set). However it lacked copy protection so the increasing availability of recordable media such as CD-R meant unauthorised copies could be made, and DVD (which had copy protection and regional coding) became available in 1998. During the 2000s, DVD replaced it.

Video CD made considerable inroads into Asia and developing nations, where it is still in use today.

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D-Theater (2002 – 2004)

D-Theater was a short-lived digital video cassette format for playback of movies in high-definition.

It is based on the D-VHS (Digital VHS) format, and is effectively a pre-recorded version of it. However, D-Theater is incompatible with D-VHS decks without the D-Theater logo. It was introduced in 2002 and supported by four film-studios, as it provided much better video quality than DVD, at a time when Blu-Ray and HD-DVD were yet to be introduced.

The last film available on D-Theater was ‘I, Robot’ in 2004.

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Video High Density (VHD) (1983 – 1986)

Video High Density (VHD) was an analogue videodisc format, marketed predominantly in Japan by JVC. It was first demonstrated in 1978 and eventually released in Japan in 1983.

VHD discs are 25 cm in diameter, and stored in a caddy like the the RCA SelectaVision system, which is inserted into the player and then withdrawn. VHD stores 60 minutes of video per side, so needs to be removed and turned over.

Like the RCA system, the signal is recorded on the discs as variations in capacitance, a conductive coating on the disc itself forming part of a resonant circuit. A diamond stylus reads the signal, though unlike CED there are no actual grooves—the stylus follows the tracks electronically, like a compact disc. Naturally this means less wear, though there is still physical contact (unlike LaserDisc) so some wear would still occur.

By the time of its launch in 1983, both LaserDisc and SelectaVision were suffering the onslaught of VHS and Betamax. JVC opted not to release VHD as a consumer product in the US, but in the UK Thorn EMI committed to the system and in 1981 invested in a factory at Swindon to press disks and developed a catalogue of ‘interactive’ titles to support a planned launch in 1984. However, it cancelled the investment in late 1983. VHD remained on the market in the UK primarily as an educational and training tool, usually linked to a computer, but attracted few customers.

A stereoscopic system was sold in Japan, achieving the 3D effect by using double-speed discs with alternate-eye images and LCS glasses to pass the correct view to each eye.

VHD was essentially defunct after 1986.

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CD-4 (Compatible Discrete 4) / Quadradisc (1972 – 1979)

Compatible Discrete 4 (CD-4) or Quadradisc was a 12-inch LP format created by JVC and RCA and introduced in 1972.

It was the only fully discrete quadraphonic phonograph record system to gain major industry acceptance.

In the CD-4 system, each of the two main channels contained the sum of the front and back signals. A separate carrier was recorded onto each groove wall that contained the difference signal for that side. From this, the combined  signals for each side could be resolved into two separate signals, creating discrete quadraphonic playback. CD-4 LPs could be played on stereo turntables,

The grooves on a CD-4 record are broader than on conventional stereo LPs, so the maximum playing time is reduced, and it was recommended that consumers play CD-4 records with a special ‘Shibata’ stylus, which increased the surface area of the stylus, thus decreasing the pressure on the grooves.

Most of the CD-4 releases by RCA were in the period between 1972 and 1975, with only 11 releases in 1976 and the last release in 1979.