Deinterlacing apparatus and method capable of outputting two consecutive deinterlaced frames

A deinterlacing apparatus comprising:

• a first storing unit which receives an input signal and buffers the input signal on a field basis;
• a second storing unit which includes first through fourth sub-memories receiving four line data, respectively, from an m-th field, an (m+1)-th field, an (m+2)-field, and an (m+3)-th field, respectively, stored in the first storing unit and sequentially storing the first through fourth line data;
• a frame generator which senses motion in the first line data and the third line data stored in the second storing unit, performs temporal or spatial filtering on the first through fourth line data in response to the result of the motion sensing, and outputs the result of the temporal or spatial filtering;
• and
• a line exchanger which receives an output signal of the first sub-memory and an output signal of the frame generator, exchanges line data of the output signal of the first sub-memory with line data of the output signal of the frame generator in response to a predetermined line exchange signal, and simultaneously outputs two deinterlaced frames,
• wherein line data of the (m+1)-th field and line data of the (m+2)-th field are sequentially stored in the first sub-memory.

A deinterlacing method comprising:

• (a) receiving and storing a plurality of consecutive interlaced fields, and then outputting, in response to a control signal, p-th interlaced line data of an m-th field, p-th interlaced line data of an (m+2)-th field, p-th interlaced line data of an (m+1)-th field, and (p+1)-th interlaced line data of the (m+1)-th field in series or the p-th interlaced line data of the (m+1)-th field, p-th interlaced line data of an (m+3)-th field, the p-th interlaced line data of the (m+2)-th field, and (p+1)-th interlaced line data of the (m+2)-th field in series;
• (b) receiving signals output in step (a) in series, converting the signals into parallel signals, and outputting first through fourth line data in parallel;
• (c) receiving the first through fourth line data output in step (b), sensing motion between fields in the first through fourth line data, and selectively outputting, as an output signal, a result of temporally filtering adjacent line data or a result of spatially filtering adjacent line data in response to the result of the motion sensing;
• and
• (d) receiving the first line data and a signal output in step (c) and selectively exchanging the first line data with line data of the signal output in step (c) in response to a predetermined line exchange signal,
• wherein the first line data are comprised of line data of the (m+1)-th field and line data of the (m+2)-th field which are repeatedly output, and in step (d), every odd-numbered or even-numbered line data of the first line data output signal are exchanged with their corresponding line data of the signal output in step (c) and then the results of the exchange are output.