Format

JVC Professional

APRIL 2007

NAB-2007

The ProHD Report

Comparing with ProHD, the total pixels/sec is the same, but DVCPRO-HD luminance falls short of the 55 million luminance pixel/sec of the ATSC, while the chrominance pixel/sec at 41.5 million is significantly higher than the 28 million ATSC, being limited by that “28 million pipe”.

And, looking at the newly announced Panasonic HPX500 P2HD camcorder (DVCPRO-HD recording) stated to have a sub-HD-resolution 620,000-pixel 3CCD native imager (presumed then to be 960 pixels horizontally and, further assuming 16:9 square pixels, 540 active pixels vertically), results in each of luminance and chrominance at 31 million pixels/sec (from a native imager reference point). The HPX500 camera front end does apply 2-dimensional pixel offset and sophisticated processing, thereby significantly increasing the effective capture resolution above the native 620,000 pixels CCDs.

A Sony XDCAM HD Camcorder, delivering to the TV station through the PD optical disc format 1440x1080i60 4:2:0, also requires pixel conversions due to the limited 1440/720 to be scaled to 1920/960:

1440x1080i60 x 1.5 (x 70%) = 49 million pixels/sec (after Kell/I reduced to 70%) Luminance 1440x1080i60 = 33 million (after Kell/I reduction) Chrominance = 16 million (after Kell/I reduction)

		Total		Total PERCEIVED	Pixels/Second
Format		Pixels/Second		Pixels/Second	PERCEIVED
Format		Luminance &		(Interlaced reduced to	Luminance only
		Chrominance		70% by Kell/I factor)	(after Kell/I factor)
ATSC 720p (REF)	83 million			No reduction	55 million
ATSC 720p (REF)	83 million			Progressive	(no reduction)
				Progressive	(no reduction)
ATSC 1080i (REF)	93 million		65 million		44 million

JVC ProHD	83 million			No reduction	55 million
JVC ProHD	83 million			Progressive	(no reduction)
				Progressive	(no reduction)
Panasonic		83 million		No reduction	41.5 million
DVCPRO-HD (720p)		83 million		Progressive	(no reduction)
DVCPRO-HD (720p)				Progressive	(no reduction)

Sony XDCAM HD	70 million		49 million		33 million

Fig. 20. This table recaps the analysis that the Kell/Interlaced factor reduces the viewer’s perceived resolution by about 70% average, while progressive material is nearly unaffected. JVC’s ProHD is the only format matching the ATSC reference. Effective maximum pixels per second is just one of several parameters indicative of the quality of the home viewer’s perceived HD video quality. Size of camcorder imager, compression type and efficiency are other important parameters affecting the viewer’s HD experience, as are shooting conditions.

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NAB-2007 specifications

The JVC NAB-2007 is a notable entry in the world of professional broadcasting and production equipment, showcased by JVC at the National Association of Broadcasters (NAB) Show in 2007. This camcorder was designed to meet the demanding needs of videographers and broadcasters, emphasizing high-definition video quality and advanced technology.

One of the standout features of the JVC NAB-2007 is its ability to capture high-definition video in various formats. It supports both 720p and 1080i resolutions, allowing users to choose the format that best fits their production needs. This flexibility has made it a popular choice among filmmakers, event videographers, and news organizations looking for quality in their content creation.

The camcorder utilizes JVC’s advanced HD CMOS technology, which enhances image quality by providing better low-light performance and reducing noise. This is coupled with a powerful optical zoom lens that enables users to capture detailed shots from a distance, making it ideal for dynamic shoots where proximity to the subject may be limited.

Another key feature of the JVC NAB-2007 is its ergonomic design, which is crafted for ease of use during extended shooting sessions. The camera is lightweight yet robust, providing operators with comfort and stability. Additionally, the user interface is intuitive, allowing for quick adjustments to settings without disrupting the workflow.

Built-in stabilization features further enhance the usability of the JVC NAB-2007, ensuring that footage remains smooth even during handheld operation. This is particularly advantageous for documentary shoots or on-the-go filming where traditional stabilization rigs may be impractical.

Connectivity options are expansive on the JVC NAB-2007, including HDMI and component outputs, enabling seamless integration with various editing systems and broadcast environments. The camcorder also includes features for live broadcasting, making it versatile for both recorded and real-time production scenarios.

In summary, the JVC NAB-2007 encapsulates a blend of impressive features, cutting-edge technology, and user-centric design, making it a suitable choice for professionals in the broadcasting and film industries seeking reliable and high-quality performance in their equipment.

JVC Professional

PERCEIVED

70% by Kell/I factor)

(after Kell/I factor)

NAB-2007 specifications