MODELING OF REAL TIME VIDEO COMPRESSION SYSTEM - Three-dimensional Discrete Cosine Transform

Fast windowed update algorithms capable of independently updating the odd discrete cosine transform (ODCT) and odd discrete sine transform (ODST) of a running data sequence are analytically developed. In this algorithm, to compute the ODCT coefficients of a real-time sequence, we do not require the ODST coefficients. Similarly, the ODST coefficients of the shifted sequence can be calculated without using ODCT coefficients. The running input data sequence is sampled using a rectangular window. However, this idea can be easily extended for other windows. The update algorithm derived herein can be used to compute the transform coefficients of the shifted sequence as new data points are available. The complexity of developed algorithm isO(N). The validity of algorithm is tested by MATLAB simulations.

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Polyphase-Basis Discrete Cosine Transform for Real-Time Measurement of Heart Rate With CW Doppler Radar

IEEE Transactions on Microwave Theory and Techniques ◽

10.1109/tmtt.2017.2772782 ◽

2018 ◽

Vol 66 (3) ◽

pp. 1644-1659 ◽

Cited By ~ 8

Author(s):

Junhyeong Park ◽

Jong-Wook Ham ◽

Seungwoon Park ◽

Do-Hoon Kim ◽

Seong-Jin Park ◽

...

Keyword(s):

Heart Rate ◽

Real Time ◽

Discrete Cosine Transform ◽

Doppler Radar ◽

Time Measurement ◽

Cosine Transform ◽

Real Time Measurement

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Steerable-Discrete-Cosine-Transform (SDCT): Hardware Implementation and Performance Analysis

Sensors ◽

10.3390/s20051405 ◽

2020 ◽

Vol 20 (5) ◽

pp. 1405 ◽

Cited By ~ 1

Author(s):

Riccardo Peloso ◽

Maurizio Capra ◽

Luigi Sole ◽

Massimo Ruo Roch ◽

Guido Masera ◽

...

Keyword(s):

Video Coding ◽

Discrete Cosine Transform ◽

Video Compression ◽

High Efficiency ◽

Frame Rate ◽

High Efficiency Video Coding ◽

Cosine Transform ◽

Coding Efficiency ◽

And Performance ◽

Efficient Video

In the last years, the need for new efficient video compression methods grown rapidly as frame resolution has increased dramatically. The Joint Collaborative Team on Video Coding (JCT-VC) effort produced in 2013 the H.265/High Efficiency Video Coding (HEVC) standard, which represents the state of the art in video coding standards. Nevertheless, in the last years, new algorithms and techniques to improve coding efficiency have been proposed. One promising approach relies on embedding direction capabilities into the transform stage. Recently, the Steerable Discrete Cosine Transform (SDCT) has been proposed to exploit directional DCT using a basis having different orientation angles. The SDCT leads to a sparser representation, which translates to improved coding efficiency. Preliminary results show that the SDCT can be embedded into the HEVC standard, providing better compression ratios. This paper presents a hardware architecture for the SDCT, which is able to work at a frequency of 188 M Hz , reaching a throughput of 3.00 GSample/s. In particular, this architecture supports 8k UltraHigh Definition (UHD) (7680 × 4320) with a frame rate of 60 Hz , which is one of the best resolutions supported by HEVC.

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