视频流的度量指标
Posted on Sun 22 August 2021 in Journal
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带宽 Bandwidth (B): Video bandwidth (amount of bits per second generated by the video).
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摄像头细节属性 Camera detail properties (DC ): Constant reflecting the camera capacity to retain scene details.
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摄像头运动成本 Camera motion cost (MC): This is a temporary variable modeling the camera encoder capacity to encode motion.
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摄像头噪声 Camera noise (NC ): Constant indicating the amount of noise in the camera.
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压缩 Compression: Temporary variable indicating how much information the video was configured to lose.
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动态范围因子 Dynamic range factor (DR): Indicates if the video is using high dynamic range (HDR) or similar technology.
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帧率 Frame rate (FPS): Number of frames per second of the video.
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帧尺寸 Frame size (F): Average frame size. This value is provided in kilobits per second (kb/s).
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Group of pictures (GOP): Number of frames between two consecutive Iframes.
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Height (h): Number of pixels in the shortest image plane (usually y axis).
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I-frame size (I): Size of I-frames. This value is provided in kilobits per second (kb/s).
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I-frame size constant (Ic): Temporary constant for I-frame size (only used for didactic explanation).
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I-frame details size (Idetails): Temporary constant for I-frame size (only used for didactic explanation).
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I-frame noise size (Inoise): Temporary constant for I-frame size (only used for didactic explanation).
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Motion encoder efficiency (MEC ): Encoder related constant which reflects the ability of the encoder to efficiently encode moving objects.
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Motion level (ML): Part of the image that is expected to be moving.
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Nature factor (NF ): Amount of nature (trees, bushes, grass, etc.) present in the scene.
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P-frame size (P): Size of P-frames. This value is provided in kilobits per second (kb/s).
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P-frame size constant (Pc): Temporary constant for P-frame size (only used for didactic explanation).
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P-frame details size (Pdetails): Temporary constant for P-frame size (only used for didactic explanation).
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P-frame noise size (Pnoise): Temporary constant for P-frame size (only used for didactic explanation).
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QP: Compression parameter defined in the H.264 standard.
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∆QP: Difference between the QP used and the reference
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QP used during measurement of some needed constants.
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Reference frame rate (F P Sref ): Number of frames per second used as reference during measurement of some needed constants.
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Reference QP: Compression parameter used during measurement of some needed constants (see QP).
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Resolution: We consider resolution as the number of points (pixels) in the image.
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Scene detail level (DS): Constant indicating the amount of detail in the scene.
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Scene illumination (L): Constant indicating the luminance (amount of light) in the scene.
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Size of Average Object (SAO): This metric reflects the expected distance of an object in the image.
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Width (w): Number of pixels in the longest image plane (usually x axis).