US 6,188,438 B1 · Method of and apparatus for identifying a signal transmitting source

Abstract

A method of and apparatus for identifying a signal transmitting source detects a switching of a signal on the reception side thereby to prevent a transmission error from occurring when a signal is switched. The apparatus for identifying a signal transmitting source comprises a transmitting source identifying code extracting circuit for extracting a transmitting source identifying code provided in a SDDI format header of a received signal, a preceding transmitting source identifying code holding circuit for detecting a change of the transmitting source identifying code, and a transmitting source identifying code comparing circuit for detecting a switching of a transmitted signal based on the transmitting source identifying code thus changed, thereby detecting a switching of the transmitting source.

Claims6

Dependent claims

A receiving apparatus for receiving a transmitted signal with a transmitting source identifying code added thereto at a transmission end of a transmission line as a received signal, comprising:

transmitting source identifying code extracting means for extracting said transmitting source identifying code indicative of an address of a transmitting source from said received signal prior to output of said received signal at said transmission end of said receiving line;
transmitting source identifying code change detecting means for detecting a change of said transmitting source identifying code extracted from said received signal by said transmitting source identifying code extracting means by comparing said extracted transmitting source identifying code with a previously extracted transmitting source identifying code;
and
transmitted signal switching detecting means for detecting a switching of said transmitted signal based on said transmitting source identifying code whose change was detected by said transmitting source identifying code detecting means.

1 more element

Dependencies are inferred from the claim text.

Method of and apparatus for identifying a signal transmitting source

Life of this patent

Method of and apparatus for identifying a signal transmitting source

Life of this patent

Abstract

Claims6