JVC Professional

APRIL 2007

NAB-2007

The ProHD Report

File-based work flow inside the News Automation Server System. Once your 20Mbps ProHD news clips are delivered to the TV station and ingested into the news servers and NLE workstations, the ProHD ENG system has done its job. The M2T clips (ProHD MPEG-2 at 20Mbps) can be utilized for highly attractive low bitrate file-based work flow, but it may make sense to decode ProHD to HD-SDI and then re-encode upon ingest to the native HD compressed intra-frame format of the news edit and server system, as this will support your existing work flow and accomplish nearly 0 latency on play-out to air. If you are currently operating NLEs and/or servers with the DVCPRO-HD format, then re-encoding to intra-frame DVCPRO- HD 720p60 when ingesting is a viable option, but bear in mind that the legacy DVCPRO-HD codec will limit horizontal resolution to 960 pixels luminance and 480 pixels chrominance (from ProHD’s 1280 and 640 respectively). Also, the gross real- time bitrate for DVCPRO-HD is about 120Mbps including overheads.

To assure full ProHD bandwidth, one way is Grass Valley’s News Server accepting HD-SDI input and re-encode using the new (soon available) JPEG2000 intra-frame. JPEG2000 matches the full bandwidth of ProHD at local news quality HD at about 60Mbps with overheads, and at 4:2:2 and 10-bit pixel depth, will preserve the ProHD overall image quality through the re-encode (and later decode). Grass Valley is in the process of implementing full JPEG2000 support, including promoting Iomega’s REV Pro (removable) hard disk cartridge as a recording sub-systems compatible with JPEG2000 HD file storage, as an attractive and cost effective “on-the-shelf” non-linear random access long term storage cartridge.

There is also Telestream’s FlipFactory, delivering a workflow automation solution for broadcast and cable news, supporting the conversion of ProHD 720p60 transport stream to several other formats upon ingest in a variety of NLEs and servers, including DVCPRO-HD.

News Archive = Fast Retrieval – On line – Cost Effective

The ProHD compressed real time bitrate is only 20Mbps or 2.5MB/s, comprising full bandwidth 1280x720p60. As stated earlier in this Report, the 80GB version of the DR-HD100U stores about 6 hours (360 minutes) of ProHD or 4.5 minutes per GB. 10TB (10,000GB) disk arrays for video applications now sell for less than $10,000 with ProHD storage capacity of 45,000 minutes. That is 750 hours of news clips and stories on line. If each clip is an average of 3 minutes, that’s 15,000 clips on line. And at the low real time bitrate of only 20Mbps per clip, multiple concurrent reads and writes of clips are achievable without bandwidth bottlenecks.

ProHD acquisition archive is automatic, as the camcorder records to the internal HDV tape cassette concurrently with live-to-air and concurrently with recording to the DR-HD100U hard disk unit.

Copyright 2007 JVC Professional Products Company All rights reserved

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JVC NAB-2007 manual News Archive = Fast Retrieval On line Cost Effective
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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.
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