Lg Electronics Inc.

Il Taek Lim

Cheol Hong Min

Kyoung Won Lim

Kyu Seok Kim

Jun Ho Bahn

A film mode detection method using a periodic pattern of a video sequence comprises the steps of: computing every absolute value of differences between every pair of corresponding pixels in two fields which are arranged within a predetermined distance on a time line; comparing a sum of the absolute value of differences between every corresponding pixels in two fields with the first predetermined threshold value M1 and limiting the sum to the first threshold value if the sum is greater than the first threshold value; filtering the video sequence and calculating a power of the filtered sum; and comparing the calculated power with the second predetermined threshold value M2 so as to determine the signal as a film mode if the power of the sum is greater than the second threshold value.

Film mode detection method using periodic pattern of video sequence

A deinterlacing method based on an edge-directional interpolation in a conversion of video signals of an interlaced scanning format into those of a progressive scanning format, in which the unit of interpolation is extended from the unit of one pixel to the unit of one pixel group. An intermediate frame video is formed from an original interlaced field video. Mismatch values associated Keith edge directions are compared, thereby determining four edge directions exhibiting mismatch values less than those of other edge directions. An interpolation pixel value is calculated, using the intermediate video frame, indices of the four edge directions, and indices of the edge directions. A determination is made based on similarities of the four edge directions, differences among the less mismatch values associated with the four edge directions, and differences of the less mismatch values from mismatch values associated with the remaining edge directions.

Deinterlacing method for video signals based on edge-directional interpolation

Disclosed is a motion-compensated interpolation (MCI)-based deinterlacing method for converting video signals of an interlaced scanning format into those of a progressive scanning format. The deinterlacing method involves a motion vector estimation step, a video signal deinterlacing step, a deinterlacing side-effect check step, and a deinterlaced result select step. The motion vector estimation step includes the steps of estimating a motion vector by the unit of a &frac12; pixel, using the previous frame, the current field, and the future field, and estimating a motion vector by the unit of a &frac14; pixel, using the previous frame and the future field. Based oh a motion vector estimated at the motion vector estimation step, the video signal is deinterlaced. The deinterlacing side-effect check is achieved by conducting a check for determining whether or not the estimated motion vector has a temporal consistency, a check for determining whether or not the estimated motion vector has a critical velocity, and a check for determining whether or not the estimated motion vector has a backward matching accuracy. When the result of the side-effect check is satisfactory, the result of the deinterlacing is accepted. On the other hand, when the result of the side-effect check is unsatisfactory, the result of a deinterlacing conducted based on a method other than the MIC is accepted.

Deinterlacing method for video signals based on motion-compensated interpolation

Disclosed are a deinterlacing method and apparatus based on a motion-compensated interpolation (MCI) and an edge-directional interpolation (EDI). The disclosed deinterlacing method and apparatus are characterized in that the deinterlacing of a video is conducted using both the MCI and EDI schemes in a single deinterlacing system. An input video signal of an interlaced scan format passes through an MCI block, an EDI block, and a line averaging interpolation (LAI) block, respectively. Respective resultant video signals outputted from the MCI and EDI blocks then pass through MCI and EDI side-effect checking blocks. Based on the checking results outputted from the side-effect checking blocks, a decision and combination block selects a desired one of the MCI, EDI, LAI pixel indices. The decision and combination block selects an output from the MCI block when MCI is superior whereas it selects an output from the EDI block when EDI is superior. Where neither MCI nor EDI is satisfactory, an output from the LAI block is selected. When both the MCI and EDI are satisfactory, an average of the MCI and EDI values is derived and outputted as a deinterlaced pixel index.

Deinterlacing method and apparatus based on motion-compensated interpolation and edge-directional interpolation

A digital signal processor being capable of rapidly operating a number of complex arithmetic formulae as such FFT. The digital signal processor operates data from first input line and data from second input line by a multiplier; operating data from any one of the first and second input lines and data from the first operating means by means of second operating means; and operating the data from any one of the first and second input lines and the data from the first operating means by means of third operating means. The data output from the multiplier is operates with any one from the first and second input lines by first accumulator. Also, the data output from the multiplier is operates with any one from the first and second input lines by second accumulator.

High speed digital signal processor

A digital signal processor having an ALU and accumulating register small in bit number. The digital signal processor adds r-bit rounding bits to an N-bit data(wherein r<N) and adds g-bit guard bits to the high-order bits of the data using bit alignment units each being implemented with a wiring, when N bit data is processed. The data added by the guard bits and the rounding bits is operated by means of the accumulator. The operated data is selectively rounded by a rounding processor. Also, the selectively rounded data is selectively saturated by a saturation processor.

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Seoul, South Korea

Il Taek Lim