Vxis Technology Corp.

Tsinghua University

National Science Council

Yuan-Hao Huang

Ming-Hsiu Lee

Tzi-Dar Chiueh

Shang-Hua Yang

Hsien-Chih She

Yi-Chun Hung

Chun-Cheng Huang

Shang-Yi Lin

Jen-Shi Wu

Chiuan-Shian Chen

Hao-Yu Yang

Jen-Yao Ho

A compressed sensing imaging method and a compressed sensing imaging system are provided. In the method, multiple grayscale masks having multiple elements with grayscale values represented by floating-point values or continuous values are generated as sensing matrices based on a compressed sensing theory. A spatial light modulator is controlled to modulate an electromagnetic wave projected on an object under test according to the grayscale value of each element in each grayscale mask, and a physical property of the electromagnetic wave passing through the object under test is detected to obtain multiple measured values. An image reconstruction algorithm is executed to reconstruct an image of the object under test by using the grayscale masks and the measured values obtained from the electromagnetic wave modulated by each grayscale mask.

Compressed sensing imaging method and compressed sensing imaging system

An image data decoding method of an image vertical blanking interval (VBI) and device thereof can adjust a run-in clock signal of data lines of teletext to a data phase of teletext data lines. The method can accurately decode data of the teletext data lines to avoid a phase bias and an erroneous decoding result. A main technical method to decode the data of the VBI is to extract the data of the teletext data lines to determine corresponding bit logical values of the image data and then to output a decode result and also output a phase adjustment value. The phase adjustment value is used to adjust a read phase value of the extracted image so as to synchronize a data phase in VBI.

Image data decoding method of image vertical blanking interval and a device thereof

The present invention uses a 2D comb filterto output a 2D chrominance signal Cby comparing the current scan-line signals with the signals before and after the current scan-line signals. A 3D chrominance signal Cis then acquired by directly subtracting two adjacent 2D image signals and then dividing by 2 to get an approximate chrominance signal Cof the two 2D images. Ratio mixing is performed on the 2D chrominance signal Cand the 3D chrominance signal Cto output a near-actual chrominance signal. A chrominance variation value can be acquired by comparing the chrominance signals of the two adjacent images. Finally, an actual luminance signal of the current scan-line is separated by deducting the near-actual chrominance signal from the signals of the current scan-line to restore the luminance signal.

Y/C separation with 3D comb filter

A clamping system for clamping a video signal, wherein the clamping system uses a charge-pump unit in company with a digital clamping controller to clamp the potential of the video signal, prior to the video signal being input to a programmable gain amplifier and an A/D converter, so as to reach a desired level. The charge-pump unit provides two charge-pump circuits, wherein one charge-pump circuit supplies a strong burst to boost the potential of the video signal while the video signal is below a threshold value. Otherwise, the other charge-pump circuit supplies a weak burst to fine tune the potential of the video signal when the video signal has reached the threshold value.

Clamping system for clamping a video signal by using a charge-pump circuit

A digital signal processing system and method applied for chroma transition, wherein the method has the acts of: performing a difference process on an original chroma signal C to obtain a first difference signal C'; calculating an absolute value |C&#x2032;| of the first difference signal C&#x2032;; performing a difference process on the absolute value |C&#x2032;| to obtain a second difference signal Ca&#x2032;; determining whether the second difference signal Ca&#x2032; is a positive signal or a negative signal; wherein based on a determined result, an optimized chroma signal is generated by either mixing the original input chroma signal C with a k-delayed chroma signal, or mixing the k-delayed chroma signal C[n&#x2212;k] with a 2k-delayed chroma signal C[n&#x2212;2k], where k is a constant.

Digital signal processing system and method applied for chroma transition

The multi-mode Multiplier-And-Accumulator of the present invention is used with the double-precision Complex-Valued Multiplier-And Accumulator as a main configuration, and the different precisions and digital modes make it more flexible, compared to the traditional real number Multiplier-And-Accumulator. In addition, it does not have a data alignment problem which occurs in the traditional application of different precision Subword Parallel processors. This kind of Multiplier-And-Accumulator takes a double-precision Complex-Valued Multiplier-And- Accumulator as the main configuration, with four double-precision real-valued multipliers and several groups of accumulators to assist in different modes ofoperation. Each double-precision real- valued multiplier can be segmented into four single-precision multipliers, and then double-precision multiplier products are obtained by means of displacement addition. If two real numbers which are continuous in time sequence are taken as the real number input and imaginary number input for the original complex-valued multipliers, the accumulated products include not only the present output accumulated product summation but also the output accumulated product summation of the previous time and the next time.

Growing community of inventors

Hsinchu, Taiwan

Yuan-Hao Huang