Deinterlacing apparatus and method

A deinterlacing apparatus, comprising:

• a buffer unit having a previous field buffer, a current field, and a next field buffer and to store, sequentially, lines of each of fields of an image signal which are successively inputted;
• a zero motion estimation unit to calculate a Sum of Absolute Difference (SAD) value based on lines of the next field stored in the next field buffer and lines of the previous field stored in the previous field buffer;
• a still region/film mode detection unit to determine whether a predetermined search region is a still region and whether a source of the image signal is a film, based on the SAD value;
• a 3D interpolation unit to output, adaptively, a temporal interpolation value and a spatial interpolation value based on motion information;
• and
• an adaptive selection unit to output a deinterlacing result based on outputs of the previous field, the next field, and the 3D interpolation unit according to an output signal of the still region/film mode detection unit.

A deinterlacing method, comprising:

• storing sequentially a previous field, a current field, and a next field of an image signal which are successively inputted;
• calculating a Sum of Absolute Difference (SAD) value by a predetermined search region unit with reference to the next field and the previous field;
• determining whether the predetermined search region is a still region and whether a source of the image signal is a film based on the SAD value;
• outputting adaptively a temporal interpolation (TI) value and a spatial interpolation (SI) value based on motion information;
• and
• outputting a deinterlacing result based on the previous field, the next field, the TI value and the SI value according to whether the predetermined search region is the still region and whether the source of the image signal is the film.

A deinterlacing method, comprising:

• storing sequentially lines of each of a previous field, a current field, and a next field of an image signal which are successively inputted;
• calculating a Sum of Absolute Difference (SAD) value based on lines of the next field and lines of the previous field;
• determining whether a predetermined search region is a still region and whether a source of the image signal is a film, based on the SAD value;
• outputting adaptively a temporal interpolation (TI) value and a spatial interpolation (SI) value based on motion information;
• and
• outputting a deinterlacing result based on outputs of the lines of the previous and next fields, the TI value and the SI value and according to a result of the determining whether the predetermined search region is the still region and whether the source of the image signal is the film, based on the SAD value.

A computer-readable medium having stored thereon computer-executable instructions to deinterlace image signals, the computer-executable instructions comprising:

• storing sequentially a previous field, a current field, and a next field of an image signal which are successively inputted;
• calculating a Sum of Absolute Difference (SAD) value by a predetermined search region unit with reference to the next field and the previous field;
• determining whether the predetermined search region is a still region and whether a source of the image signal is a film based on the SAD value;
• outputting adaptively a temporal interpolation (TI) value and a spatial interpolation (SI) value based on motion information;
• and
• outputting a deinterlacing result based on the previous field, the next field, the TI value and the SI value according to whether the predetermined search region is the still region and whether the source of the image signal is the film.

A computer-readable medium having stored thereon computer-executable instructions to deinterlace image signals, the computer-executable instructions comprising:

• storing sequentially lines of each of a previous field, a current field, and a next field of an image signal which are successively inputted;
• calculating a Sum of Absolute Difference (SAD) value based on lines of the next field and lines of the previous field;
• determining whether a predetermined search region is a still region and whether a source of the image signal is a film, based on the SAD value;
• outputting adaptively a temporal interpolation (TI) value and a spatial interpolation (SI) value based on motion information;
• and
• outputting a deinterlacing result based on outputs of the lines of the previous and next fields, the TI value and the Si value and according to a result of the determining whether the predetermined search region is the still region and whether the source of the image signal is the film, based on the SAD value.