Data transmission system, equipment suitable for such a system and data transmission method
View Patent ↗A data transmission system is formed by a transmitter ( 50 ) for processing useful data for the purpose of forming series of information signals, and a receiver ( 51 ) for receiving and processing the transmitted series of information signals. In this system, integrity verification is provided for conditionally producing an error indication for the transmitted series of information signals whereby the transmitted series of information signals can be validated even in the case where the error indication appears. Thus, it is possible to transmit image data in a system that has a small bandwidth.
1. A system, comprising:
a transmitter for processing and transmitting useful data for the purpose of forming a series of information signals;
a receiver for receiving and processing the transmitted series of information signals;
integrity verification means for conditionally producing an error indication of the transmitted series of information signals; and
means for validating the transmitted series of information signals in a first mode and rejecting the transmitted series of information signals in a second mode even if the error indication is produced by the integrity verification means.
2. The system of claim 1 ,
wherein the transmitter forms a header for the transmitted series of information signals; and
wherein the integrity verification means influences the header of the transmitted series of information signals.
3. The system of claim 2 ,
wherein the transmitter inserts positioning information into the header of the transmitted series of information signals; and
wherein the integrity verification means produces the error indication in response to a reception by the receiver of the transmitted series of information signals that is in non-conformity with the positioning information.
4. The system of claim 1 ,
wherein the transmitter inserts positioning information into a header of the transmitted series of information signals; and
wherein the integrity verification means produces the error indication in response to a reception by the receiver of the transmitted series of information signals that is in non-conformity with the positioning information.
5. The system of claim 1 , further comprising:
means for distinguishing between the first mode of the system and the second mode of the system, wherein the first mode is permitted to accept more errors than the second mode.
6. A transmitter, comprising:
means for processing and transmitting useful data for the purpose of forming a series of information signals; and
means for inserting positioning information into a header of the transmitted series of information signals wherein an error indication is produced in response to a reception by a receiver of the transmitted series of information that is in non-conformity with the positioning information whereby, despite the production of the error indication, the useful data is accepted in a first mode and rejected in a second mode.
7. A receiver, comprising:
means for receiving and processing a series of information signals transmitted to the receiver by a transmitter;
integrity verification means for conditionally producing an error indication of the transmitted series of information signals; and
means for validating the transmitted series of information signals in a first mode and rejecting the transmitted series of information signals in a second mode even if the error indication is produced by the integrity verification means.
8. A method of transmitting useful data by a first series of information signals, the method comprising:
positioning a header for the useful data to be transmitted;
analyzing the header for conditionally producing an error indication of the header;
accepting the useful data in a first mode even if the error indication is produced; and
rejecting the useful data in a second mode if the error indication is produced.
9. The method as claimed in claim 8 , further comprising:
inserting error coding information into the header; and
producing the error indication as a function of the error coding information.
10. The method as claimed in claim 8 , further comprising:
inserting an indication of a length of the first series of information signals into the header; and
producing the error indication in response to a failure of a second series of information signals to appear at an instant defined by the length indication.
11. The method as claimed in claim 8 , further comprising:
distinguishing between the first mode and the second mode, wherein the first mode permits to accept more errors than the second mode for the purpose of validating the useful data.