Wszystkie pola: time coding - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Selection of Wavelet Video Codec Parameters to Optimize Coding Time
Autorzy:: Popławski, A.
Powiązania:: https://bibliotekanauki.pl/articles/226134.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optimization
wavelet video coding
scalability
Opis:: In the paper, results of experimental research on wavelet video codec are presented. The author has put emphasis on the optimal selection of the coder parameters to optimize the coding time. The author has used six test sequences (Basket, City, Crew, Harbour, Ice and Soccer in 352x288, 30 fps) for the experiments. The sequences used in the research are commonly used to assess the effectiveness of video sequence compression. The measurement of the image quality is based on the PSNR. The results of optimal selection of wavelet video codec parameters due to the coding time are presented. The main goal of the paper is to show the coder parameters that provide the best values of the PSNR for a reduced coding time.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 4; 341-349
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Methods of Time-Frequency Analysis in Authentication of Digital Audio Recordings
Autorzy:: Korycki, R.
Powiązania:: https://bibliotekanauki.pl/articles/226798.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tampering detection
audio authenticity analysis
media authentication
electric network frequency
time-frequency analysis
digital audio forensics
inverse decoder
MP3
compressed audio
perceptual audio coding
Opis:: This paper describes the problem of tampering detection and discusses the main methods used for authenticity analysis of digital audio recordings. For the first topic, two frequency measurement algorithms based on electric network frequency criterion are applied. Time-frequency analysis is used and improved with reassignment method for purpose of visual inspection of modified recordings. The algorithms are shortly described and exemplary plots are presented with interpretation. The last described method, recently proposed, is based on checking frame offsets in compressed audio files.
Źródło:: International Journal of Electronics and Telecommunications; 2010, 56, 3; 257-262
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Two-Way Relaying Cooperative Wireless Networks : Resource Allocation and Performance Analysis
Autorzy:: Abrar, M.
Gui, X.
Punchihewa, A.
Powiązania:: https://bibliotekanauki.pl/articles/226891.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: relay network
relay protocol
resource allocation
two-way relaying
bidirectional relaying
Analog Network Coding
Time Division Broadcast
Opis:: Relay-based cooperative wireless networks have been widely considered one of the cost-effective solutions to meet the demands in future wireless networks. In order to maximize the overall sum-rate while maintaining proportional fairness among users, we investigate different resource allocation algorithms in two-way relay networks with analog network coding (ANC) protocol and time division broadcast (TDBC) protocol. The algorithms investigated are different from traditional proportional fairness schemes in terms of fairness and computational complexity as we have applied Access Proportional Fairness (APF) and Minimum Rate Proportional Fairness (MRPF) along with load balancing at the relays. A MATLAB simulation has been performed and simulation results show the effectiveness of these algorithms.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 3; 229-235
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

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