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  2. Wireless security camera - Wikipedia

    en.wikipedia.org/wiki/Wireless_security_camera

    Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.

  3. Closed-circuit television camera - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television...

    These cameras do not require a video capture card because they work using a digital signal which can be saved directly to a computer. The signal is compressed 5:1, but DVD quality can be achieved with more compression (MPEG-2 is standard for DVD-video, and has a higher compression ratio than 5:1, with a slightly lower video quality than 5:1 at best, and is adjustable for the amount of space to ...

  4. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    It is estimated to incorporate the video feeds of a total of 15,000 cameras. [164] The system is used by Chicago's Office of Emergency Management in case of an emergency call: it detects the caller's location and instantly displays the real-time video feed of the nearest security camera to the operator, not requiring any user intervention ...

  5. Hikvision - Wikipedia

    en.wikipedia.org/wiki/Hikvision

    In October 2023, Hikvision reportedly recommitted its operations to the United Kingdom after clarifying that the ban on its cameras on sensitive sites does not extend to public authorities or police stations. The use of their security cameras was adopted by U.K. authorities despite opposition from ministers worrying of "security threats".

  6. List of 4K video recording devices - Wikipedia

    en.wikipedia.org/wiki/List_of_4K_video_recording...

    Samsung NX1 - First prosumer camera to record in HEVC, 4K downsampled from 6.5K, 80 Mbit/s in H.265. 30 min max recording time limit Samsung NX500 - Same 28 MP APS-C sensor as NXI but 4K video is not downsampled from 6.5K so less details and more noise than the NX1 - with this 2.4× crop factor the kit lens become a 38–120mm f8.5–13.4 ...

  7. Flip Video - Wikipedia

    en.wikipedia.org/wiki/Flip_Video

    Flip cameras' video quality was unusually good for their prices and sizes. [8] They can record videos at different resolutions. FlipHD camcorders digitally record high-definition video at 1280 x 720 resolution using H.264 video compression, Advanced Audio Coding (AAC) audio compression and the MP4 file format, while the older models used a 640 x 480 resolution. [9]