Remote surveillance system

Abstract

An audio / visual surveillance system for use in mobile vehicles such as patrol cars includes two video cameras producing video signals and four audio sources producing audio signals. The signals are MPEG-2 compressed and streamed in real time with geographic and time data to a digital cartridge-type tape recorder located in the vehicle. A full patrol car shift is recorded on a single tape and, at the end of the shift, the tape is placed in a master sled bay. An MD5 hash authenticates the data for court use. Up to four videos can be synchronized frame-by-frame for simultaneous monitoring. An MPEG-1 stream is sent via wireless to headquarters in real time. One camera captures data external to the vehicle, while the other captures data internal to the vehicle. One audio source captures audio inside the vehicle and another captures dispatcher communications. The other two audio sources are carried by officers.

Description

RELATED APPLICATIONS [0001] This application is a divisional application of U.S. patent application Ser. No. 10 / 285,862 filed Nov. 1, 2002, which claims the benefit of U.S. Provisional Application No. 60 / 335,926 filed Nov. 1, 2001, and U.S. Provisional Application No. 60 / 415,905 filed Oct. 3, 2002.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The invention relates to the field of remote audio / visual surveillance, and more particularly to such a system that is compact enough to be carried in a vehicle, such as a patrol car, and at the same time is capable of recording high-resolution video at high frame rates. [0004] 2. Statement of the Problem [0005] Audio / visual surveillance systems that are sufficiently compact to be carried in a vehicle, such as a police or patrol car, are well known. These systems generally involve recording audio and visual information on a local recording system in the vehicle, transmitting the audio and visual information to a central co...

AI Technical Summary

Benefits of technology

[0010] The present invention advances the art and overcomes the aforementioned problems by recognizing that the way to avoid having evidentiary gaps in the audio visual record is to have high resolution audio / visual recording operating at all times that a police car is on patrol, 24 hours a day, 7 days a week, 365 days a year. With the prior art video systems, this would immediately lead to data overload. However, the inventors have also recognized that the above requirement does not mean that the audio / visual system has to be able to store scores of hours or days of data in the vehicle, because patrol officers always work in shifts that generally are of from 8 to 12 hours in length. The inventors have recognized that, if changing the data medium is made simple enough, it can become a routine part of the shift change, and operate repeatably and reliably.

[0017] Once the tape cartridge is inserted into the sled bay in the central command center or other location, the system, software, and method of the invention permit the audio / visual data to be easily retrieved, monitored, synchronized with other data, stored, and archived. The fact that it is encoded via the MPEG-2 standard facilitates this. The data on the tape is preferably transferred to a hard drive of a command server, preferably with a form of RAID data storage. If the data is to be monitored, multiple videos can be synchronized and viewed at the same time. In the preferred embodiment, up to four videos can be viewed at the same time. For example, if four police units were at an event and recorded the event, the event can be viewed from four different angles. The data can also be decoded and transferred to any desired medium, for example, an analog tape or a DVD disk.

Problems solved by technology

With the prior art video systems, this would immediately lead to data overload.

Further, the fragility of hard drives and the hazards of police work make the use of such drives problematic in the patrol car environment.

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