Why do security cameras not record sound?

Video surveillance in the supermarket

They can be seen more and more often on the streets. They have long been part of everyday life in shopping centers and supermarkets. They are so common that we often don't even notice them. But they perceive us, every day, around the clock. We're talking about Surveillance cameras. They can help prevent or solve theft and vandalism and they give us a sense of security. Here is some important information about video surveillance in the supermarket.

Surveillance cameras for protection against theft and vandalism

To avoid damage from theft and vandalism, the owner of a supermarket is allowed to monitor his business premises. He can do one for that detective get involved or a Video surveillance system to install. The permission for video surveillance can be found in Section 6b of the Federal Data Protection Act (BDSG). The advantage of camera surveillance is obvious. While the detective can only be in one place without camera support, he can view the recordings from all video cameras almost simultaneously on a monitor wall.

Retention time of video recordings

The archiving periods for the recordings depend on the purpose of the monitoring. The recordings made by the surveillance camera are personal data. This means that they must be deleted immediately when the recordings have served their purpose. For video surveillance in the supermarket, which serves to ward off theft and vandalism, archiving is only permitted for a maximum of 48 hours. During this period it is decided whether the records are necessary to preserve evidence. Longer storage is possible, but justification and documentation must be provided. Modern cameras therefore continuously overwrite older recordings.

Covert video surveillance in the supermarket is not permitted

Everyone has the right to informational self-determination. This term describes the right of every person to decide for himself what he wants to reveal to the public. Video surveillance affects this right. The Federal Data Protection Act allows Camera surveillance in certain cases, but requires that the data subjects be informed. A sign at the entrance must clearly indicate the video surveillance. If the customer enters the supermarket anyway, the legislature assumes the customer's consent through implied action. The law also prohibits covert video surveillance. DIN 33450 describes how this Video surveillance sign is to be designed and attached.

The reference to camera surveillance should also be made if dummies are used or the cameras are not in operation. Some regulators insist because the customer can't tell the difference from a real camera.

Which rooms can be monitored?

In principle, ยง 6b BDSG allows camera surveillance in publicly accessible areas. Parking spaces used by the customer in front of the supermarket, sales areas or access routes. If it concerns areas that are not accessible to everyone, for example the warehouse that can only be entered by employees, the provisions of Section 32 BDSG must be observed.

In addition, Section 201a of the Criminal Code must be observed when installing and operating a video surveillance system. The camera must not make recordings in specially protected areas, such as an apartment, a changing room or the toilet in a department store.

Effects on labor law

If the owner of a company plans to install a surveillance camera, he must first obtain the approval of the works council and conclude a works agreement. This is to prevent video surveillance recordings from being used to control employees. He has to inform the employees where the cameras are installed and which areas are monitored at what times.

The surveillance of individual employees is only permitted if there is sufficient suspicion that they have committed a criminal offense and the evidence can only be provided by means of video surveillance.

The data protection officer should participate in the planning and commissioning of the monitoring system at an early stage.

Good resolution, but no sound

Good surveillance systems record the recordings directly on a connected network recorder. The optimal connection between the camera and recorder is made via a cable. WLAN cameras or radio cameras do not provide interference-free images and are not recommended for continuous monitoring.

For the resolution of a surveillance camera with recording, cameras with 1 K 2 megapixels are the minimum. The designation "1 K" means that the sensor in the camera has 1,024 horizontal pixels, while the megapixels indicate the number of pixels on the sensor. In the meantime, cameras with 2 K 4 megapixels and a good night vision function or 4 K 8 megapixels for bright, illuminated surfaces are becoming established. A new standard is emerging here.

An IP surveillance camera can be easily integrated into the network and creates video recordings with a high resolution. However, saving in a cloud is not recommended. Expandable monitoring sets are an inexpensive way to get started. Surveillance sets that contain several cameras of the same type and a recorder are suitable for supermarkets. In these rooms, cameras are often installed for the same task.

The position of a surveillance camera is well chosen if it is installed at a height of 1.50 meters plus the distance between the start of the surveillance area and the camera. At this level it is protected from acts of sabotage.

Sound recordings are prohibited during video surveillance. These video recordings are not valid as evidence in court.