INTERVIEW QUESTIONS MULTIMEDIA GIF ANIMATION DETAILS

Question: What is the purpose of Global Color Table (GCT) in GIF Animation?

Answer: Global Color Table (GCT) is represented by a sequence of bytes that represents Red, Green and Blue color triplets. Global Color Table is used for images with plain text extensions. Every global color table’s presence is marked by the Global Color Table Flag. The GCT Flag is set to 1 in Logical Screen Descriptor. The block contains the number of byes equal to 3 x 2 size of global color table + 1. One Global Color Table is present per Data Stream.

Global Color Table (GCT) is represented by a sequence of bytes that represents Red, Green and Blue color triplets. Global Color Table is used for images with plain text extensions. Every global color table’s presence is marked by the Global Color Table Flag. The GCT Flag is set to 1 in Logical Screen Descriptor. The block contains the number of byes equal to 3 x 2 size of global color table + 1. One Global Color Table is present per Data Stream. Source: CoolInterview.com

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