Thursday, 15 December 2011

Editing

Because HDV video is recorded in agenda form, aboriginal agreeable can be affected assimilate addition band or captured to a computer for alteration after affection degradation. Depending on capturingcomputer application and computer's book system, either a accomplished band is captured into one abutting file, or the video is breach in abate 4 GB or 2 GB segments, or a abstracted book is created for anniversary take. The way files are called depends on capturing software. Some systems catechumen HDV video into proprietary average architecture on the fly while capturing, so aboriginal architecture is not preserved.

HDV footage can be natively edited by best non-linear editors, with real-time playback actuality accessible on avant-garde boilerplate claimed computers. Slower computers may display bargain achievement compared to added formats such as DV because of aerial resolution and interframe compression of HDV video.

Editing achievement can be bigger by converting HDV to average architecture above-mentioned to editing. These accommodate assorted Cineform products, Edius HQ, Avid DNxHD, Apple Average Codec and Apple ProRes 422, amid others. Usage of an average codec adds one added bearing to the video, potentially aspersing its quality. On addition hand, an average codec can abate blockiness and fix added issues in the aboriginal video, like interlaced blush in accelerating recordings.

Depending on the non-linear alteration arrangement (NLE), it is accessible to abbreviate bearing losses by alteration built-in HDV video application beeline cuts only, with no effects, and apprehension aback to HDV. Up to 15 frames per anniversary cut may be re-encoded because of long-GOP attributes of HDV video.

Distributing

HDV video can be recorded or printed aback to tape. Such tapes are generally accustomed by bounded television stations, admitting abounding organizations adopt the submissions to be delivered in higher-end architecture like Digital Betacam, HDCAM or D5 HD.650 It is additionally accessible to almanac M2TS book to any media that offers abundant capacity, like a DVD, alien HDD drive or a anamnesis card.

For customer use, HDV-sourced video can be delivered on a Blu-ray Disc after re-encoding, can be adapted to AVCHD and delivered on an AVCHD disc, or can be downconverted to DVD-Video.

Products

Canon

Canon XL-H1

Canon HV30

Canon entered the HDV bazaar in September 2005, with the Canon XL H1, a professional-oriented modular camera arrangement with changeable lenses, HD-SDI output, and three 1440 × 1080 ⅓" CCDs. This was the aboriginal HDV camcorder to acquiesce 1080-line built-in accelerating recording.

In July 2006, Canon appear the handheld XH A1/XH G1 models, which use the aforementioned sensor as the XL-H1. Both models allotment the aforementioned anatomy and best of the features, with the XH G1 geared appear able multi-camera assembly and including access for HD-SDI/SD-SDI Out, genlock, and time code.

Later in the aforementioned year, Canon alien the consumer-oriented Canon HV10, a bunched assemblage with a distinct 2.76 megapixel CMOS sensor. The camera recorded interlaced video only.

In April 2007 Canon appear the HV20 which acclimated the aforementioned sensor and centralized processor as the HV10, had a beyond lens and added accepted layout. This was the aboriginal customer HDV camcorder that featured accelerating cutting modes in accession to built-in interlaced recording. Progressive-scan video was recorded aural interlaced alembic to abide accordant with customer akin alteration suites. The adaptation for 50 Hz bazaar offered PF25 mode, which activated Accelerating anecdotal Frame technique, while the 60 Hz alternative featured PF24 mode, which activated 2-3 pulldown scheme.

The HV30, appear in 2008, was a accessory amend of the HV20. The anatomy blush has been afflicted from argent to black, the LCD awning has been improved, and the 60 Hz alternative implemented PsF-like PF30 mode.

In 2009 Canon appear the HV40. Its 50 Hz alternative was about identical to the HV30, while the 60 Hz alternative became the aboriginal customer HDV camcorder able of built-in accelerating 24 frames/s recording.

edit JVC

JVC GY-HD100

In 2003 JVC appear the aboriginal HDV camcorder — the handheld GR-HD1. The camcorder offered accepted DV recording mode, HDV 720p30 and HDV 480p60. The HDV modes acclimated the earlier Rec. 601 accepted for blush space, rather than the newer Rec. 709 accepted advised for high-definition video. The imager of the GR-HD1 acclimated a distinct 1/3" CCD sensor instead of a 3CCD setup, addition abnormal best black able use.The GR-HD1 was not accepted in either the customer or semi-professional market, and JVC after confused its HDV development to able shoulder-mounted cameras.

The accept arise GY-HD100 camcorder was appear in 2005 and featured 3CCD imaging arrangement with built-in 720p resolution, changeable lens and 24 frame/s recording. Because of the closing affection this camcorder became accepted for cutting "digital movies". The adapted version, GY-HD110, provides several updates and anchored split-screen aftereffect begin on some GY-HD100 cameras.

The GY-HD200, appear later, offered 50p/60p recording, 720p-to-1080i advocate and Anton Bauer able array with mount.

In 2006 JVC appear the GY-HD250, which simplified multi-camera recording by accouterment genlock and time cipher input/output. HD/SD-SDI achievement accustomed to almanac uncompressed video.

In 2008 the "B" modification of the GY-HD200 was released, acceptance alive recording of either 720p or 1080i arresting assimilate an alien tapeless recorder. Recording to band was still performed in 720p approach only.

edit Sharp

Sharp is the alone affiliate of the HDV Consortium that has not produced an HDV camcorder or a videocassette recorder. The abutting Sharp has anytime got in acknowledging HDV accepted is the AQUOS DV-ACV52 agenda video player. The amateur supports HDV video, admitting it does not accept a band transport. Instead, it allows playback and dubbing of DV/HDV video from a camcorder affiliated to the amateur via a FireWire connector.

Sony

Sony specializes in 1080i HDV accessories and makes articles for both 60 Hz and 50 Hz markets. Traditionally, Sony uses suffixes "E" and "P" to analyze 50 Hz models, and suffix "U" or no suffix at all to analyze 60 Hz models. Models listed beneath are defined after suffixes.

In September 2004 Sony appear the aboriginal HDV 1080i camcorder, the HDR-FX1. Its able version, the HVR-Z1, came with XLR audio inputs and 44 added features. Most notably, the HVR-Z1 was switchable amid 50 Hz and 60 Hz scanning to baby for the altered scanning ante acclimated in altered markets.

In the average of 2005 Sony appear its aboriginal customer HDV model, the HDR-HC1, which had a distinct CMOS sensor, cyberbanking stabilization arrangement and was able of recording in DV and HDV 1080i modes. Its able version, the HVR-A1, added a added accent shoe in abode of the flash, XLR audio inputs, added recording options, beyond eyecup and beyond lens hood.

In 2006 Sony replaced the HDR-HC1 with the abate and cheaper HDR-HC3, which featured an incrementally bigger CMOS chip, but bare some appearance of its predecessor. The HDR-HC3 was replaced by the HDR-HC5 which acclimated the aforementioned CMOS dent as the HDR-HC3, and added an advantage of recording in xvYCC blush space. The backup model, the HDR-HC7 came with a college pixel calculation CMOS sensor and with a microphone input. Like the HDR-HC5, the HDR-HC7 could additionally almanac xvYCC. In 2008 the HDR-HC7 was replaced with the HDR-HC9.

In 2006, Sony added two fresh models to its flush HDV lineup: the "advanced amateur" HDR-FX7 and its able cousin, the HVR-V1. The progressive-scan CMOS sensors of these models boldness abounding 1080 curve of vertical resolution. The HDR-FX7 annal interlaced video only, while the HVR-V1 offers the best of cutting interlaced or accelerating video. Accelerating video is adapted to interlaced application pulldown for recording assimilate tape.

In August 2007, Sony alien the shoulder-mounted adaptation of the HDR-HC7, the HVR-HD1000.57

In November 2007, Sony appear the HVR-Z7 handheld camcorder and the HVR-S270 shoulder-mounted camera. Both use the aforementioned three 1/3" ClearVid CMOS sensors and attain ablaze acuteness agnate to that of the admirable DSR-PD170 while alms HDV recording in built-in interlaced, accelerating browse and built-in accelerating modes. The Z7 has 2 XLR audio inputs and HDMI achievement while the S270 has 4 XLR inputs and appearance HD-SDI output.58 Presently the HVR-S270 is the alone HDV camcorder able of recording assimilate full-size DV cassettes.

In 2008 the HDR-FX1 and the HVR-Z1 were replaced with the HDR-FX1000 and the HVR-Z5, respectively. The above changes accommodate utilizing CMOS sensors instead of CCD, and accelerating approach shooting. The FX1000 annal accelerating browse video application pulldown, while HVR-Z5 offers built-in accelerating recording.59

In November 2008 Sony restarted assembly of the HDR-FX7 camcorder, which had been discontinued a year earlier. Offered for about bisected the aboriginal price, the HDR-FX7 bridged the gap amid the HDR-HC9 and the FX1000.

In summertime 2009 Sony discontinued the HDR-HC9 on the North American market, but restarted its sales in bounce 2010, this time announcement it not as an HDV camcorder, but as a MiniDV HD camcorder.60 MiniDV HD has never been clearly presented as an another name for HDV. The added aggressive HD recording accepted that uses DV cassettes is DVCPROHD. In bounce 2011 the HDR-HC9 is no best accessible for acquirement from the Sony's North American online store.

Future of HDV

JVC appear its most recent HDV camcorder — the GY-HD250 — in 2006, and appear the "B" modification of the earlier GY-HD200 in 2008. The most recent HDV camcorder fabricated by Canon — the HV40 — was appear in 2009, but it traces aback to the HV20 developed in 2007. The most recent Sony customer HDV archetypal is the HDR-HC9, originally appear in 2008 and discontinued on the North American bazaar in 2011. 2008 was additionally the year back Sony presented the most recent "advanced amateur" and able HDV camcorders, namely the HDR-FX1000 and the HVR-Z5.

All the three above manufacturers of HDV accessories — JVC, Canon and Sony — accept heavily invested in development of MPEG-2 video compression arrangement and abide to await on it in their able tapeless camcorder lineups: XDCAM HD (Sony), XDCAM EX (Sony and JVC), XDCAM HD422 (Sony), XF Codec (Canon). At the aforementioned time Sony and Canon accept abutting Panasonic in business of AVCHD recording format, which is claimed to bear beheld affection commensurable to HDV at bisected the datarate.6162 Customer aerial analogue camcorders appear by these companies back 2009 apply AVCHD format.

Industry analysts do not apprehend fresh HDV products, but accept that manufacturers will abide to abutment HDV for their absolute users, while at the aforementioned time transitioning to file-based workflow.63

edit Specifications

Format name HDV 720p HDV 1080i

Media "Small" or "Large" DV cassette

Video

Frame aspect arrangement 16x9

Frame admeasurement in pixels 1280 × 720 1440 × 1080

Pixel aspect arrangement 1.0 1.33

Scanning blazon progressive interlaced progressive (optional)

Video arresting 720p/60, 720p/30, 720p/24, 720p/50, 720p/25, 1080i/30 (29.97), 1080i/25 1080p/30 (29.97), 1080p/24 (23.98), 1080p/25

Video Compression MPEG2 Video (profile & level: MP@H-14/HL) MPEG2 Video (profile & level: MP@H-14)

Sampling abundance for luminance 74.25 MHz 55.6875 MHz

Chroma sampling architecture 4:2:0

Quantization 8 $.25 (both luminance and chrominance)

Compressed video bitstream amount ~18.3 Mbit/s ~25 Mbit/s

Audio

Compression MPEG-1 Audio Layer II, PCM MPEG-1 Audio Layer II

Sampling abundance 48 kHz

Quantization 16 bits

Audio modes and abstracts amount MPEG-1 Part 3 AL 2 Stereo (2-channel) at 384 kbit/s (192 kbit/s per channel);

optional MPEG-2 Part 3 AL 2 4-channel at 96 kbit/s per channel.

System

Stream blazon MPEG carriage beck (MPEG-TS)

Stream interface IEEE 1394 in alpha approach (also accepted as FireWire 400 or i. LINK)

File addendum .m2t (generally)