Process for the transmission of images

US5771102A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wilhelm Vogt · Lichtenau, DE
• Dirk Lappe · Waldbronn, DE
• Rodolfo Mann Pelz · Hannover, DE
• Oliver Vogt · Green Bay, US
• Gunnar Nitsche · Hildesheim, DE
• Frieder Mundt · Neumünster, DE

Key dates

• Filing date: Dec 22, 1995
• Grant date: Jun 23, 1998
• Expiry date: Dec 22, 2015

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/70
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The process for transmission of images enables various classes of source-coded image data to be channel-coded and transmitted at various class code rates. For this purpose, source-coded image data to be transmitted are divided into classes of different sensitivity with respect to transmission errors and the classes are provided with different error protection and are channel-coded for transmission. Information words are provided at the beginning of each class containing information regarding the class type, code rate, number of data bits belonging to a particular class and regarding the error protection employed. In addition, a synchronizing word is added to the image data for each image. In the receiver the first information words are channel-decoded according to a fixed code rate and the information stored in the first information words including code rate is used for the channel-decoding of the received coded image data. The image data are subsequently subjected to an image source decoding and read out.