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This contribution deals with the different interpretation of the definition and differences between often used terms: practically disposable dynamic range (DR) and signal-to-noise ratio (SNR) of CCD image sensors. The paper presents an empirical formula for expressing the maximal value of a practically disposable dynamic range of silicon CCD sensors. This formula was created by the approximating of...
This paper deals with the problem of a camera calibration for a photogrammetry and computer vision purposes. Mathematic formulation of the 3D point representation in an external space and its transformation into 2D image space is exposed. The pinhole camera model is used for a problem simplification The camera calibration problem represents intrinsic and extrinsic parameters determination. The stereo...
This paper deals with the testing and assessment of the interferences influence on the DVB-T signals transmitted over the simulated AWGN transmission channel. All experiments were realized in a simulated laboratory environment for typical DVB-T system and channel coding parameters and variable signal levels of the main and disturbing (interfering) signals. Briefly commented results of these measurements...
The paper describes a novel metric for video quality measurement. The metric is capable of estimating peak signal-to-noise ratio (PSNR) values of pictures in compressed bit streams conforming to the H.264/AVC standard. It is designed and has been tested for intra predicted pictures with varying encoder settings. The metric uses an artificial neural network to estimate PSNR examining the compressed...
This paper deals with the transmission of the digital television signal according to the DVB-T standard in SFN network and fixed reception. The laboratory transmission system for simulated broadcasting based on R&S RF test and measurement equipments is presented. The results of bit-error rates and S/N ration in the channel of simulated DVB-T broadcasting in SFN using two transmitters and SFN echo...
The article desribes a metric for H.264/AVC compressed video quality evaluation, which is being developed by our group. The metric operates on the encoded bitstream only. It uses the data directly present in the bitstream (or just entropy coded). No pixel decoding should be necessary, which will result in low computational complexity, and cosequently the possibility to analyze several bitstreams simultaneously...
This contribution presents a concept of a novel objective metric for MPEG-4 AVC / H.264 video no-reference quality evaluation. The metric should operate on the encoded bitstream only, bringing the great benefit of reducing computational complexity as no pixel decoding is necessary. We are only relying on the information directly present in the encoded bitstream. One part of the system is analyzed...
The paper deals with the development, realization and results of the measurements of the real television channel simulator, which was developed at the Institute of Radio Electronics, Brno University of Technology for educational and research purposes.
The article briefly describes parameters of transmission channel and parameters of measuring the transmission and the sources of possible transmitting errors. In the first part, types of the transmission channels, the theoretic planning of the signal coverage and causes of simulating of ideal transmission channels are shown. The next part deals with the types of errors and the causes of errors in...
The paper describes an approach to teaching the digital TV technology at the Faculty of Electrical Engineering and Communication, Brno University of Technology (FEEC BTU). The main emphasis is given to description of laboratory education of practical exercises in an unique laboratory of digital TV technology. Sophisticated technical equipment of this laboratory, measuring workplaces and examples of...
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