Signal-processing apparatus including a second processor that, after receiving an instruction from a first processor, independantly controls a second data processing unit without further instruction from the first processor

A signal-processing apparatus comprising:

• a first processor;
• a second processor controlled directly by the first processor;
• a data processing unit controlled directly by the second processor;
• a first bus coupled to the data processing unit;
• a shared memory coupled to the first bus and used by the data processing unit;
• a video input/output unit coupled to the first bus;
• a second bus coupled to the first processor;
• and
• a bridge unit coupled to the first bus and the second bus,
• wherein the data processing unit comprises at least:
• a first hardware block dedicated to deblocking filtering;
• and
• a second hardware block dedicated to motion estimation, and
• performs video encode processings on data received from the video input/output unit or performs video decode processings to generate data to be output through the video input/output unit.