Local ring network and method for transmitting digital data in a local ring network

A local network, comprising:

• an optical data line;
• a plurality of subscribers connected to one another by said optical data line for forming a ring network and for transmitting at least one of control data, audio data, and video data;
• at least one of said subscribers constituting a data source for at least one of the audio data, video data and control data and at least another one of said subscribers constituting a data sink for at least one of the audio data, video data and control data;
• said data source having a data source control unit and a data source interface to said optical data line, said data source being configured for passing a control command, via said data source interface, to said optical data line, the control command having a length defined by said data source, having a command header sequence and having a sequence of n parameters, n being a first given number;
• said data sink having a data sink control unit, a picture output unit, a data sink interface and a memory for holding and for outputting video data via said picture output unit, said data sink control unit controlling the outputting of the video data;
• said data sink control unit receiving said control command, via said data sink interface, and interpreting the control command by interpreting m initial ones of the n parameters, m being a second given number;
• and
• said data sink control unit reading video data corresponding to the m initial ones of the n parameters from said memory of said data sink and outputting the video data, corresponding to the m initial ones of the n parameters, on said picture output unit.