Method and circuit arrangement for the memory-optimized processing of a composite video baseband signal CVBS signal

Method for the memory-optimized processing of a video signal which is compatible with conventional color television transmission systems and is composed of a main area and additional information items and is transmitted in fields, the fields being buffer-stored, comprising:

• buffer storing a field in different memory areas such that successive lines of the main area are written alternately to a first and a second memory area;
• simultaneously reading stored lines of the main area of two successive fields repeatedly in succession;
• combining lines of the main area for the purpose of reducing cross-colour interference and cross-luminance interference;
• applying combined lines to a vertical filter to upconvert the number of lines;
• and
• reproducing successive fields A and B at a repetition rate of 100 Hz in an ABAB sequence.

A method for the memory-optimized processing of a video signal which is compatible with conventional color television transmission systems and is composed of a main area and additional information and is transmitted in fields, the fields being buffer-stored, the method comprising:

• storing lines of the main area of successive fields in a first memory area;
• storing lines of the additional information items of successive fields in separate sections of a second memory area;
• horizontally subsampling the additional information items by a factor of 2;
• applying lines of the main area and lines of the additional information items to a vertical filter;
• vertically filtering lines of the main area and of the additional information items for the purpose of up-conversion;
• and
• reproducing successive fields A and B at a repetition rate of 100 Hz in sequence AABB.

A method for the memory-optimized processing of a video signal which is compatible with conventional color television transmission systems and is composed of a main area and additional information and is transmitted in fields, the fields being buffer-stored, the method comprising:

• storing lines of the main area of successive fields in a first memory area;
• storing lines of the additional information items of successive fields in separate sections of a second memory area;
• applying lines of the main area and lines of the additional information items to a vertical filter;
• vertically filtering lines of the main area and of the additional information items for the purpose of up-conversion;
• and
• reproducing successive fields A and B at a repetition rate of 100 Hz in sequence AABB.