Details
JVC's GY-HM750E is built with the same compact shoulder form factor as other HM700 series camcorders, but offers enhancements and features not available on earlier models:
The GY-HM750E is based on an upgraded 3rd generation digital processing engine that improves overall picture quality and provides the ability to record either HD or SD directly to economical SDHC solid state media.
Dual hot-swap memory card recording can now take place on both cards simultaneously, or individually for virtually unlimited recording time.
The 68-pin chassis connector now permits a growing number of expansion modules such as the KA-AS790 DVB-ASI adapter
Pre-rec (retro) cache has been increased to 20 seconds
Like other "HM" series models the new 750 is a full resolution HD progressive camera well suited for demanding ENG and EFP applications.
Modular Design
The GY-HM750E is equipped with a 68-pin chassis connector that allows various modules to be attached to the unit without external cabling. JVC presently offers a DVB-ASI module (KA-AS790G) and an SxS Memory Card recorder (KA-MR100G). Modules are installed to the rear panel chassis connector, and are powered directly by the camera. No additional cabling is required. Modules effectively become part of the camera with no unsightly exposed cables. This design also provides for future expansion. Note: Fiber and Multi-core modules specifically designed for the GY-HM790 utilize advanced features of the HM790 and are not compatible with the GY-HM750E.
Performance
Designed to Achieve Higher HD Picture Quality with JVC's Advanced Technologies
The GY-HM750E utilizes three precisely aligned 1/3-inch progressive scan full HD CCDs—one each for red, green and blue primary colour—and outputs full resolution in both 720p and 1080i/p. JVC's advanced ProHD capture technology incorporates a new patent-pending Adaptive Pixel Correlation Technique (APCT), and combined with TRIPLEX Offset Technology delivers exceptional resolving power comparable to cameras with larger image sensors. The highly efficient ProHD form of H-V pixel shift, where the Blue pixels' sensor array is shifted ½ pixel horizontally, while the Red pixels' sensor array is shifted ½ pixel vertically (both referenced to the Green array), enables recovery of additional luminance detail between the photosites of each pixel. By applying the Adaptive Pixel Correlation Technique, the camera achieves a remarkable improvement in image texture and resolving power in the 1080i/p modes. The TRIPLEX/APCT system differentiates between "object directions" in high frequency areas of the image, to the extent vertical, horizontal, diagonal (left) or diagonal (right), and then applies pixel compensation for lost pixels in high frequency areas. Furthermore, using a global shutter, the design minimizes wobbling during quick pans and fixed pattern noise in low light conditions, contributing to a more stable image.
Upgraded 35Mbps MPEG2 Encoder Drawing on its long experience of developing dedicated encoders for the broadcasting industry, JVC has equipped the GY-HM750E with a powerful MPEG2 encoder capable of compressing full 1920 x 1080 HD video at up to 35 Mbps. The result is the pristine picture quality that professional users demand, from a surprisingly compact and lightweight shoulder-mount camcorder. MPEG2 long GOP is the most widely accepted broadcast standard compression supported by all popular editing systems and broadcast servers. In the HQ mode, the encoder operates with a variable bit rate average of 35Mbps. The SP mode records at a constant bit rate of either 19.7Mbps or 25Mbps to ensure compatibility with a wide range of equipment.
The GY-HM750E supports all major signal formats including 1920 x 1080, 1440 x 1080, 1280 x 720, and 720 x 480.
35Mbps
25Mbps
19Mbps
1920 x 1080/59.94i
1440 x 1080/59.94i
1280 x 720/59.94p
1920 x 1080/50i
1440 x 1080/50i
1280 x 720/50p
1920 x 1080/29.97p
720 x 480/59.94i
1280 x 720/29.97p
1920 x 1080/25p
1280 x 720/25p
1920 x 1080/23.98p
1280 x 720/23.98p
1440 x 1080/59.94i (.mov only)
1440 x 1080/50i (.mov only)
1280 x 720/59.94p
1280 x 720/50p
1280 x 720/29.97p
1280 x 720/25p
1280 x 720/23.98p
Variable Frame Rate Recording (Over crank, Under crank) When recording in the 720p 35Mbps mode, the camera can be set to record at a frame rate different than the playback rate. This capability makes it possible to record slow or fast motion when the recording is played back at 24p or 30p.
Standard Definition Recording Capability Responding to the needs of the industry, the GY-HM750E, in addition to its capability as an HD recorder, offers Standard Definition recording for maximum flexibility. Recording in SD provides a time-saving alternative to down-conversion of HD material for SD broadcasts, which is still an industry standard in many countries worldwide. This feature offers a fundamental advantage for professionals with time-sensitive SD workflows.
High performance Canon HD lens The GY-HM750E includes a detachable 14x Canon KT14x4.4KRSJ HD lens based on the superb optics found in more expensive HD lenses. Its superior MTF provides higher resolution than typical "stock" lenses. The lens has improved lateral and longitudinal chromatic aberration characteristics and is ideal for full 1920 x 1080 imaging. Canon's internal focusing system minimizes "breathing" compared with typical focusing systems. Internal focus also makes possible a more efficient light blocking lens hood. ENG shooters will be pleased with its wider angle and consistent brightness from 4.4mm (wide) to 62mm (telephoto) with no F-drop. Operation is the same as with all professional lenses, with mechanical control of focus, and servo or manual control of zoom and aperture.
In addition to the GY-HM750E's standard detachable 14x Canon lens, numerous lens options are available from JVC including the 13xTh13x3.5BRMU wide angle Fujinon zoom lens, a new 17x XT17sx45BRMK1 Fujinon zoom lens, 18x HTs18X4.2BRM Fujinon zoom lens, 20x KT20X5BKRS Canon zoom lens, and adapters that allow ½-in and 2/3" bayonet mount lenses to be used. Add the HZ-CA13U film lens mount adapter to the 1/3" bayonet mount, to enable mounting of 16mm film camera lenses to the GY-HM750E, greatly expanding production lens options. The camera features an "image flip" function that corrects for the inverted image produced by prime lenses.
Secure Digital High Capacity (SDHC) memory card recording The GY-HM750E records on widely available SDHC Class 6 or Class 10 memory cards, presently available in capacities up to 32GB. The camera provides 2 memory card slots, for a total of up to 64GB of on board storage—enough for more than 6 hours* of continuous HD recording. In the relay mode, the camera automatically begins recording on the second card when the first card fills up. When the second card fills up, the camera will revert to recording to the first card slot, allowing for virtually unlimited recording lengths. The GY-HM750E is also able to record on both memory cards simultaneously, instantly providing a back-up or client copy of the recording. The file format and data rate of the clips on each card will be identical.
Class 6 or Class 10 cards are required. If a class 2 or 4 card is inserted, a warning indicator will be displayed. Being able to quickly switch cards with dual slots is invaluable in a breaking news situation where a producer may wish to begin editing while the shooter is still capturing footage.
*When recording in 19Mbps mode
Separate flip open covers protect card slots from dust, moisture and open separately for each card. If a cover is opened while the card is being recorded on, a warning message is displayed on the VF/LCD.SDHC cards are economical, highly reliable, and make possible a recording system that consumes up to 20% less power than tape or HDD based systems. The per-minute cost of SDHC memory is comparable to professional video tape. Moreover, SDHC media is the first practical solid state solution to physical archive.
Native File Recording
The GY-HM750E incorporates JVC's Native File Recording technology that stores video in the ready-to-edit file formats used by Apple's Final Cut Pro™, Adobe Premiere™, and other popular non-linear editing systems. The HD and SD ".mov" files created in the camera can be easily dragged onto Final Cut Pro's or Premiere's timeline or clip bin without conversion or rewrapping, saving time while keeping the recorded material first generation. There is no need to use an intermediate codec.
For users of other NLE systems, including solutions from Avid, Canopus and Vegas, the GY-HM750E supports the MP4 file format which can edited without re-encoding. HDV-compatible M2T files can also be created from these MP4 files using the ProHD Clip Manager. 4:2:2 uncompressed digital video is provided via HD-SDI output for recording onto an external recorder.
For standard definition applications, in addition to .mov format files, the GY-HM750E creates popular type-2 AVI files that imports easily into most current and legacy NLE systems.
