Method and apparatus for pre-processing in a common-format control processing input signals of, or output signals for, interfaces of different type

Method for pre-processing output signals for interfaces of different type in a common-format central processing using a common system clock, said different interface types being associated with differing sample clock frequencies and/or differing data frame or data word formats, said method including the steps:

• further processing sample words that were output from said central processing and stored in an intermediate store by forming system clock synchronised PCM bitstream format signals therefrom, which PCM bitstream format signals have a uniform word format and are related to said interfaces of different type;
• channel encoding said system clock synchronised PCM bitstream format signals having a uniform word format according to differing channel protocols related to said different-type interfaces, thereby providing corresponding system clock synchronised output signals;
• generating from said system clock synchronised output signals interface-type related output signals that are no more system clock synchronised but conform to said type of interface.

Apparatus for pre-processing input signals of interfaces of different type for common-format central processing, using a common system clock, said different interface types being associated with differing sample clock frequencies and/or differing data frame or data word formats, said apparatus including:

• means for generating from the input signals of interfaces of different type system clock synchronised input signals;
• means for channel decoding said system clock synchronised input signals according to differing channel protocols related to said different-type interfaces, thereby providing corresponding PCM bitstream format signals having a uniform word format;
• means for further processing said PCM bitstream format signals so as to form therefrom sample words that are stored in an intermediate store from which the sample words are fed to a central processing.

Apparatus for pre-processing output signals for interfaces of different type in a common-format central processing using a common system clock, said different interface types being associated with differing sample clock frequencies and/or differing data frame or data word formats, said apparatus including:

• means for further processing sample words that were output from said central processing and stored in an intermediate store by forming system clock synchronised PCM bitstream format signals therefrom, which PCM bitstream format signals have a uniform word format and are related to said interfaces of different type;
• means for channel encoding said system clock synchronised PCM bitstream format signals having a uniform word format according to differing channel protocols related to said different-type interfaces, thereby providing corresponding system clock synchronised output signals;
• means for generating from said system clock synchronised output signals interface-type related output signals that are no more system clock synchronised but conform to said type of interface.