JPEG2000 Stand alone DVR User Guide

4-3-4 Interval setup

1.[SWITCH INTERVAL]

FULL- Full Screen Sequence Interval setup. (Range: 1~99 SEC)

PIP- Picture in Picture, the sub-picture’s sequence interval setup. (Range: 1~99 SEC)

2.[EVENT RECORD]

Event Update Time is to avoid the DVR from recording the event logs from the same event. The event types include alarm, motion and video loss. When an event is triggered, it is possible that the same event keeps on being triggered for a period of time. With the help of Event Update Time, whenever there is an event, the DVR records the starting time and information of the event in the Event Log, and ignores the following events within the duration set in the Event update time. The setting range of the Event Update time is from 10 seconds to 990 seconds.

4-3-5 Alarm setup

1.[CHANNEL]

Use [+] and [-] to select a channel.

2.[ALARM INPUT]

Set up the Alarm Input type.

N.C- when the alarm is triggered, the circuit turns closed (ON).

N.O- when the alarm is triggered, the circuit turns opened (OFF).

3.[DURATION]

Set up a post- alarm recording duration and the alarm output duration. The duration setting is applied to both functions. The setting range is from 1 second to 300 seconds.

Note: Alarm output can be triggered by alarm input and video loss. Motion cannot trigger an alarm output.

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Hitachi JPEG2000 manual Interval setup, Alarm setup
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JPEG2000 specifications

Hitachi JPEG2000 is a high-performance image compression technology that utilizes advanced coding techniques to provide superior image quality while maintaining a smaller file size. It is built upon the JPEG2000 standard, which was developed by the Joint Photographic Experts Group (JPEG) to address limitations in traditional JPEG compression methods, particularly in terms of scalability, quality, and error resilience.

One of the main features of Hitachi JPEG2000 is its use of wavelet compression. Unlike the Discrete Cosine Transform (DCT) employed in standard JPEG, which works on small blocks of images, JPEG2000 utilizes a wavelet transform that allows for multi-resolution analysis of images. This means that images can be compressed at various quality levels, enabling users to access lower-resolution versions without needing to decompress the entire image. This scalability is particularly beneficial for applications like streaming and remote visualization, where bandwidth may be limited.

Another significant characteristic is its superior error resilience. Hitachi JPEG2000 is designed to gracefully handle data corruption that can occur during transmission. This feature is crucial for applications in medical imaging or satellite imagery, where maintaining image integrity is essential. The technology allows for random access to image components, enabling portions of an image to be retrieved without needing to decode the entire file. This capability enhances efficiency when dealing with large datasets.

Additionally, Hitachi JPEG2000 supports lossless compression, meaning that the original image quality can be preserved without any loss of data during compression. This is particularly important for fields such as healthcare, where diagnostic imaging requires absolute precision. The algorithm also offers adjustable compression rates, providing flexibility for different use cases without compromising quality.

The technology is widely implemented in various industries, including broadcasting, film production, and medical imaging, thanks to its ability to deliver high-quality images in a manageable file size. As a versatile solution, Hitachi JPEG2000 stands out with its combination of advanced compression techniques, error resilience, and scalability, making it a preferred choice in an increasingly digital world where efficient data handling is paramount.
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