Transducer repositioning
AssigneeThomson Licensing
InventorsDonald Henry Willis, Mark Alan Schultz, Jianlei Xie
Life of this patent
Estimating the term…
Abstract
In an digital disk player the timely acquisition of requested replay sectors is particularly important during trick mode operation. Delay in a transduced bitstream path is substantially obviated from the process of controlling a transducer position during replay by a method comprising the steps of receiving a first and a second transducer address for controlling the transducer position responsive to a replayed address. Comparing the replayed address with the first transducer address to detect equality therebetween. In response to the detected equality moving the transducer to a new position determined by the second transducer address.
Claims13
A method for controlling a transducer position during replay in digital disk apparatus, comprising the following steps:
- receiving a last sector address and a next sector address for controlling said transducer position responsive to a replay sector address, wherein the replay sector address is separately error corrected from the last sector address and the next sector address;
- comparing said replay sector address with said last sector address to detect equality therebetween;
- and
- moving said transducer responsive to said detected equality, to a new position determined by said next sector address.
An apparatus for reproducing a digitally encoded signal from a medium, comprising:
- a transducer positionally controlled for transducing said digitally encoded signal and providing a replay sector address;
- and,
- a controller coupled said transducer for controlling a position thereof responsive to said digitally encoded signal and a last sector address coupled thereto, wherein,
- responsive to said digitally encoded signal and said last sector address being substantially equal said controller controls said transducer to a second position determined by a next sector address.
An apparatus for reproducing a digitally encoded signal from a medium, comprising:
- a transducer positionally controlled for transducing said digitally encoded signal and providing a replay sector address;
- a controller coupled to said transducer for controlling a position thereof responsive to said digitally encoded signal and a last sector address coupled thereto;
- and
- a comparator for comparing said digitally encoded signal and said last sector address, and having an output coupled to said controller for changing said transducer position,
- wherein responsive to said digitally encoded signal and said last sector address being equal said comparator output causes said controller to change said transducer to a second position determined by a next sector address.
Dependencies are inferred from the claim text.