Video data processing apparatus, video data encoding apparatus, and methods thereof

A video data processing method for removing a repeat field from video data, comprising the steps of:

• detecting the repeat field contained in the video data;
• analyzing a pattern of the repeat field contained in the video data corresponding to the detected results of the repeat field detecting step and determining whether the pattern of the repeat field is continuous or discontinuous;
• removing the repeat field contained in the video data;
• and
• controlling the video data processing step to remove a field determined as a repeat field by the repeat field detecting step from the video data in a period that the patten of the repeat field is determined continuous by the analyzing step and the video data processing step not to remove a field determined as a repeat field by the repeat field detecting step from the video data in a period that the pattern of the repeat field is determined discontinuous by the analyzing step.

A video data encoding apparatus for encoding video data in which a repeat field is placed in a predetermined sequence, comprising;

• analyzing means for analyzing a pattern of the repeat field contained in the video data and determining whether or not the pattern of the repeat field is continuous;
• video data processing means for removing the repeat field from the video data;
• encoding means for encoding video data that is output from said video data processing means;
• and
• controlling means for controlling said video data processing means to remove a field determined as a repeat field by said repeat field detecting means and perform an encoding process in a frame prediction mode and a frame DCT mode in a period that the pattern of the repeat field is determined continuous by said analyzing means and for controlling said video processing means not to remove a field determined as a repeat field by said repeat field detecting means and perform an encoding process in one of a frame prediction mode and a field prediction mode and one of a frame DCT mode and a field DCT mode in a period that the pattern of the repeat field is determined discontinuous by said analyzing means.

A video data encoding method for encoding video data in which a repeat field is placed in a predetermined sequence, comprising the steps of:

• analyzing a pattern of the repeat field contained in the video data and determining whether or not the pattern of the repeat field is continuous;
• removing the repeat field from the video data;
• encoding video data that is output from the removing step;
• and
• controlling the video data processing step to remove a field determined as a repeat field by the pattern analyzing step and perform an encoding process in a frame prediction mode and a frame DCT mode in a period that the pattern of the repeat field is determined continuous by the analyzing step and for controlling the video processing step not to remove a field determined as a repeat field by the pattern analyzing step and perform an encoding process in one of a frame prediction mode and a field prediction mode and one of a frame DCT mode and a field DCT mode in a period that the pattern of the repeat field is determined discontinuous by the analyzing step.