supports the following aspect ratio conversion methods:

•Full — The video signal is scaled disproportionately to fill the display of the new aspect ratio. Aspect distortion occurs as the image is stretched/compressed to fit in the new aspect ratio.

4:3

 

 

16:9

 

 

 

 

 

 

 

 

 

 

 

16:9

 

4:3

 

 

 

 

 

 

 

 

 

Figure 6 Full Aspect Ratio Conversion

•Zoom — The central portion of the video signal is zoomed to fill the display of the new video format. No aspect distortion is introduced but the edges of the video signal may be cropped.

4:3

 

 

16:9

 

 

 

 

 

 

 

 

 

 

 

16:9

 

 

4:3

 

 

 

 

 

 

 

 

 

 

Figure 7 Zoom Aspect Ratio Conversion

•LttrBx — Black bars are added to the top and bottom of a 16:9 image to display correctly in a 4:3 video format.

16:9

 

4:3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 8 Letter Box Aspect Ratio Conversion

•PllrBx — Black bars are added to the right and left of a 4:3 image to display correctly in a 16:9 video format.

4:3

 

 

16:9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 9 Pillar Box Aspect Ratio Conversion

Assigning FCFS Channels

FCFS channels are assigned to either specific inputs or bus-pairs. Each bus-pair requires two FCFS channels. The bus pairs are as follows:

•PGM – Preset buses

•Key 1 Video – Key 1 Alpha buses

•Key 2 Video – Key 2 Alpha buses

•Key 3 Video – Key 3 Alpha buses

•Aux 1 – not paired

•Aux 2 – not paired

•Aux 3 – not paired

FCFS channels maintain separate settings for different switcher video formats. This lets you change between switcher video formats without losing FCFS channel configurations.

Note:

•Using an FCFS channel creates a one frame delay for the input video being processed.

To assign an FCFS channel:

2

1

6

4

 

3

1.Press MENU.

2.Press the REF Wipe Pattern button.

3.Press NEXT until Fcfs is displayed.

4.Use the Fcfs knob to select the FCFS channel you wish to assign.

5.Press the Fcfs knob to display the FCFS menu.

6.Use the Fcfs1-4knob to assign the FCFS channel. You can choose from the following:

•Off — The FCFS channel is not assigned.

•Input — The FCFS channel is assigned to a single input.

•Bus — The FCFS channel is assigned to all inputs on a specific bus.

6

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JVC KM-H3000U, KM-H2500U, KM-H3000E, KM-H2500E manual Assigning Fcfs Channels, To assign an Fcfs channel
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KM-H2500, KM-H2500U, KM-H3000U, KM-H2500E, KM-H3000E specifications

The JVC KM-H3000E, KM-H2500E, KM-H3000U, KM-H2500U, and KM-H2500 are professional video production switchers designed to meet the demands of live broadcasting, events, and production environments. These switchers are renowned for their robust construction, intuitive operation, and advanced features that cater to a wide range of workflow requirements.

The KM-H3000E and KM-H3000U are high-end models, offering extensive capabilities for complex productions. Both units feature a 1 M/E switcher configuration, enabling seamless switching between multiple video sources. The KM-H3000 series supports HD and SD formats, ensuring compatibility with various input signals. One of its significant characteristics includes a large-scale multi-viewer output, which provides operators with the ability to monitor multiple sources on a single screen, enhancing the efficiency of live production.

In terms of connectivity, the KM-H3000 series equipped with extensive I/O options, allowing for flexible integration with other broadcast equipment. It also supports external keyers, picture-in-picture effects, and advanced chroma keying, creating dynamic live content that captivates audiences. Additionally, the user interface is designed for quick and intuitive operation, featuring customizable buttons and clear labeling that streamline the switching process.

On the other hand, the KM-H2500E and KM-H2500U serve as mid-range alternatives, suitable for smaller operations without compromising functionality. These models maintain a compact design while still offering an impressive array of features. The KM-H2500 series includes 1 M/E switcher capabilities and supports multiple HD/SD formats, similar to its higher-end counterpart, but with slightly reduced input options.

One notable feature of the KM-H2500 is its cost-effectiveness, making it an attractive choice for educational institutions, small production houses, and local broadcasters. It supports simple transitions, effects, and basic keying, enabling users to produce quality content without the complexity of more advanced systems.

In summary, JVC's KM-H series offers versatile solutions for video production, whether it's high-end broadcasting or smaller-scale operations. With their robust feature sets, ease of use, and flexible connectivity, the KM-H3000E, KM-H2500E, KM-H3000U, KM-H2500U, and KM-H2500 are exceptional choices for any production environment. These switchers exemplify JVC's commitment to quality and innovation in the realm of professional video equipment.
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