KR20040045594A - Separated Network DVR System - Google Patents

Abstract

PURPOSE: A digital video recorder with a distribution function is provided to compress, store and manage images captured by a lot of cameras and transmit the images through the Internet. CONSTITUTION: A digital video recorder includes an image compression and transmission unit(100), a storage unit(200), and a search and management unit(300). The image compression transmission unit consists of an image compression part, a transmitter(101), an audio transmitter, and a serial communication part. The storage unit includes an image receiver(201), an image storage, and a network manager. The search management unit employs a general personal computer and carries out searching and managing functions.

Description

Distributed Digital Video Recorder {Separated Network DVR System}

The present invention has a compression, storage, retrieval / management function of the existing digital video recorder (DVR). A system integrates the compression, storage, retrieval and management of incoming analog video. The performance of the system is fixed, and if a small number of cameras are installed in a digital video recorder (DVR) that can install 16 cameras, it is wasteful and more than 16 cameras cannot be installed. For example, if 17 cameras are installed, two digital video recorders (DVRs) capable of installing 16 cameras are inefficient.

The existing digital video recorder (DVR) is PC based. In general, if more than 16 cameras are installed, the compression capacity is not enough to store all the images, and the hard disk is also difficult to attach more than four, so the storage period is not long.

For example, in the case of a digital video recorder (DVR) that can compress and store 120 images per second, it is possible to save and store 30 images per camera when four cameras are mounted in the digital video recorder (DVR). With up to 16 cameras, you can store up to seven cameras. The disadvantage is that you can't save 30 images of every camera.

If only one central digital video recorder (DVR) fails, the video from all cameras is useless.

The digital video recorder (DVR) is equipped with a camera compression device so that even if the number of cameras increases, it can be configured to store 20 to 30 images per second. We present a method of storing and retrieving a compressed image. For example, even if 1000 cameras are installed, all images of 1000 cameras can be compressed and transmitted.

If the compression, storage, and retrieval management devices are independent and transmitted and stored using a network, the compression, storage and retrieval of the central digital video recorder (DVR) can be done without problems.

A typical digital video recorder has compression, storage, retrieval and management functions in one system, but the distributed digital video recorder is distributed over a network.

The components are largely divided into image compression transmission unit, storage unit and retrieval management unit.

The video compression transmitter comprises an image compressor, a transmitter, an audio transmitter, and a serial communication unit.

The storage unit consists of an image receiver, an image storage unit, and a network management unit.

The search management unit is a general personal computer class and performs search and management functions of a conventional digital video recorder (DVR).

A large number of cameras can be installed in any number.

Increase storage capacity and duration without using mass storage

Remote installation is possible. It can be installed in three or four universities in Seoul, three or four in Japan, and several in the United States.

High stability

Video conferencing is possible.

Claims (4)

After compressing the image transmission method using the file transfer protocol to the image receiving unit 201 of the storage unit 200. If the file being compressed in real time is uploaded by making it into a specific size, the file being created can be stably stored in the storage unit as a file from a remote place at a certain time or size. In general, the file transfer protocol that transmits a file over a network knows the file name or size and transfers the file. However, data entered and transmitted in real time over the network is a streaming stream that has no specific size or name. To save or copy a file, you need to specify the file name and file size. Since video streaming is a continuous image information, there is no specific size, so the image transmission unit 101 of the video compression storage unit 100 sets an arbitrary file name, and if a certain time or size is reached, the image receiver can recognize one complete file. Signal to ensure stable storage of video streams. Distributed storage means. If the network is not good, you can not receive the video from the remote place and save it. It is the function to transmit the video first at the local end before sending it to the remote network to compensate for this. And remotely there is a function to retrieve the stored data. In distributed storage, there is no problem of transmission line error than storing and storing hard disks in the center, so it is possible to install stable and large number of hard disks in the required area easily and efficiently. Network stored video / audio data management means. When the video is saved, it records the time when the motion was captured, the area where the motion occurred in the video, the volume of the sound, and the information captured on the digital index so that the situation when the approximate video is saved without searching the video can be recorded. Way. Since the event logo is an encrypted format similar to simple texts compared to video data, the data volume is small and it is easy to transmit and manage through the network. Distributed Digital Video Recorder (DVR) System. Compression, storage and search / management functions are separated, so even if a large number of cameras are installed and managed, there is no problem and hardware configuration can be made according to the required number. The system that separates the compression hardware from the storage hardware and search / manage the system can be installed and managed in the desired area through the network. Search / manage through the network, so multiple management systems can be operated. If some system fails, it will not affect the whole system. This is a distributed digital video recorder (DVR).