Preparation (continued)

2. Requirements for network using VN-E4

2-1 Network Bandwidth

Ensure that there is sufficient network bandwidth for the data volume to be transmitted by VN-E4.Data volume to be transmitted by VN-E4varies with the number of image or audio distributions.

Data volume of images

VN-E4enables creation of up to 8 different types of images.

 

Input CH

Frame Size

 

 

 

No. 1

CH1

VGA

 

 

 

No. 2

CH1

QVGA

 

 

 

No. 3

CH2

VGA

 

 

 

No. 4

CH2

QVGA

 

 

 

No. 5

CH3

VGA

 

 

 

No. 6

CH3

QVGA

 

 

 

No. 7

CH4

VGA

 

 

 

No. 8

CH4

QVGA

 

 

 

VN-E4allows distribution of each image to multiple destinations. Data of image to be transmitted by VN-E4is therefore the aggregate total of all these data.

Data volume of No. 1 L no. of distributions + data volume of No. 2 L no. of distributions +...+ data volume of No. 8 L no. of distributions

The number of distributions shall be the total number of stream transmissions via TCP (number of clients) and multicast. (Example)

Data volume will be calculated according to the formula below when 3 streams of No. 1 are sent. JPEG file size per frame L frame rate L 3

If the JPEG file size per frame is 30 KB and frame rate is 30 fps, then data volume will be as follows.

30 KB L 30 fps L 3 = 2700 KB/sec = Approx. 21 Mbps

The JPEG file size per frame varies with the parameter set as well as input video signals. The following table may be used as a reference.

Picture Quality Control Method

VGA File Size

QVGA File Size

 

 

 

 

 

1 (High)

80 KB

27 KB

 

 

 

 

 

2

60 KB

20 KB

 

 

 

 

 

3

40 KB

13 KB

VFS (Variable File Size)

 

 

 

4 (Medium)

30 KB

10 KB

 

 

 

 

 

5

25 KB

8 KB

 

 

 

 

 

6

20 KB

7 KB

 

 

 

 

 

7 (Low)

15 KB

5 KB

 

 

 

 

 

 

Selection may be made from the

Selection may be made from the

AFS (Average File Size)

 

range between 10 to 100 KB

range between 3 to 33 KB

CFS (Constant File Size)

 

Selection may be made from the

Selection may be made from the

 

 

range between 10 to 100 KB

range between 3 to 33 KB

 

 

 

 

Audio data volume

Audio data transmitted by VN-E4is at 64 kbps per stream. Audio data volume may be calculated using the following formula. 64 kbps L no. of streams

The number of streams is the total number of streams sent via TCP (number of clients), streams sent via multicast, and stream received by VN-E4.

(Example)

When VN-E4sends out 2 audio streams and receives 1 audio stream, data volume will be as follows. 64 kbps L 3 = 192 kbps

NOTE:

When there is insufficient network bandwidth, the number of JPEG frames (frame rate) that may be acquired by the client will decrease.

In addition, delay time will be prolonged and interruptions will also occur in the audio data.

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JVC manual Requirements for network using VN-E4,  2-1 Network Bandwidth, Input CH Frame Size

VN-E4 specifications

The JVC VN-E4 is a high-performance video camera that has garnered attention for its innovative features and cutting-edge technology. Designed for both amateur enthusiasts and professional videographers, this model showcases JVC's commitment to delivering superior image quality and user-friendly functionality.

One of the standout features of the VN-E4 is its advanced imaging sensor. It utilizes a high-resolution CMOS sensor that captures stunning 4K video footage, providing exceptional clarity and detail. With a wide dynamic range, the camera excels in various lighting conditions, ensuring vibrant colors and deep contrasts. This makes it suitable for diverse shooting environments, from bright outdoor scenes to dimly lit interiors.

The VN-E4 also supports a range of frame rates, including high-speed recording options that enable slow-motion playback. This is particularly valuable for filmmakers looking to add dramatic effects to their projects. With its excellent low-light performance, the VN-E4 allows users to shoot in challenging conditions without sacrificing image quality, making it an ideal choice for events, documentaries, and creative projects.

Equipped with JVC's proprietary image processing technology, the VN-E4 offers enhanced noise reduction and image stabilization. This results in smoother footage, even during handheld shooting or when capturing fast-moving subjects. The optical image stabilization technology is especially useful for reducing the shakiness common in handheld videography.

In terms of connectivity, the VN-E4 is designed with versatility in mind. It includes multiple input/output options, including HDMI and USB ports, allowing for easy integration with external devices. This feature is essential for live streaming and professional broadcasting applications, enabling users to connect to external monitors or recorders seamlessly.

User-friendly controls are another hallmark of the JVC VN-E4. The camera features an intuitive menu system and customizable buttons, allowing for quick access to frequently used settings. The ergonomic design ensures that it is comfortable to hold for extended shooting sessions, making it a practical choice for long projects.

Battery life is another important characteristic of the VN-E4. With energy-efficient technology, the camera can operate for extended periods without frequent recharging, providing peace of mind for videographers on long shoots.

In summary, the JVC VN-E4 stands out for its impressive combination of high-resolution imaging, advanced stabilization, extensive connectivity, and user-friendly design. Whether for creative filmmaking or professional use, this camera provides the tools necessary to capture stunning video with ease and versatility, making it a valuable addition to any videographer's toolkit.