INTRA-MACROBLOCK/INTER-MACROBLOCK DECISION METHOD IN VIDEO CODING, VIDEO CODING APPARATUS, VIDEO CODING PROGRAM AND STORAGE MEDIUM FOR THE PROGRAM

PROBLEM TO BE SOLVED: To suppress a deterioration in image quality by avoiding a color sticking phenomenon which occurs in such a case that a motion vector has not appropriately calculated in coding a video. SOLUTION: For a macroblock to be coded which is decided to be an inter- macroblock by compar...

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Hauptverfasser:	NAKAJIMA JUNICHI, KOBAYASHI NAOKI, ONO HISANORI, YASHIMA YOSHIYUKI, SHINSENJI HISAMI, TSUJI HIROYUKI, OKADA SHIGEKI, SAKATANI TORU
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To suppress a deterioration in image quality by avoiding a color sticking phenomenon which occurs in such a case that a motion vector has not appropriately calculated in coding a video. SOLUTION: For a macroblock to be coded which is decided to be an inter- macroblock by comparing the levels between a MAD (maximum absolute difference) of a luminance value Y and an SAD (sum of absolute difference) of the value Y, MAD and SAD in two color difference values U, V in the macroblock are further calculated by a color difference decision means 12 respectively. When a value obtained by subtracting the weighted coefficient from either of the SADs is larger than the MAD, a predicted error of the macroblock to be coded is considered to be large, and the macroblock is re-decided to be an intra-macroblock. COPYRIGHT: (C)2004,JPO