A full HD sensor has a 1080p resolution. Full HD, or FHD, refers to a resolution of 1920 x 1080 pixels, which is commonly used in high-definition video and surveillance systems for providing clear and detailed images.
[Reference: Axis Communications. "Understanding video resolutions in surveillance." Axis Video Resolutions., , ]
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Question 25
View areas enable multiview streaming, which means that users can
Options:
A.
stream multiple video streams from several cameras simultaneously.
B.
stream optically zoomed views and normal views simultaneously.
C.
stream multiple views, which are cropped from the full view, simultaneously, stream the same video stream to multiple viewers simultaneously.
View areas enable multiview streaming by allowing users to stream different parts of the camera's field of view simultaneously. This includes the ability to stream both optically zoomed-in views and the full, normal views at the same time. This feature enhances monitoring flexibility and situational awareness by providing multiple perspectives from a single camera feed. Axis documentation on multiview streaming explains how view areas can be configured to deliver both zoomed and wide-angle views concurrently, facilitating comprehensive surveillance.
Question 26
External (non-integrated) IR illumination can help to (Select two)
External (non-integrated) IR illumination can significantly enhance the performance of surveillance cameras in low-light conditions. By increasing contrast in the scene, it allows the camera to capture clearer images with more detail. Additionally, external IR illumination provides more flexibility in placement and coverage, ensuring that the entire area of interest is adequately illuminated. This can be particularly useful in large or irregularly shaped areas where integrated IR might not be sufficient. Axis documentation supports the use of external IR illuminators to improve image quality and scene visibility in low-light environments.
Question 27
Which is true about variable bitrate (VBR)?
Options:
A.
It forces the bitrate to stay at a constant low level
B.
It maintains the image quality, even in high-motion scenes
C.
It dynamically adjusts the frame rate in high-motion scenes
D.
It helps reduce the bitrate when there is a lot of image noise
Variable bitrate (VBR) is a video encoding method that adjusts the bitrate according to the complexity of the video scene. The primary advantage of VBR is that it maintains image quality, even in high-motion scenes, by allocating more bitrate when needed and reducing it during simpler scenes. This ensures consistent image quality while optimizing the use of bandwidth. Axis Communications’ documentation on video compression and bitrate management confirms the benefits of VBR in maintaining image quality.
