Method and apparatus for reproducing a compressed digital video signal at multiple speed
AssigneeSamsung Electronics Co., Ltd.
InventorGoan-soo Seong
Life of this patent
Estimating the term…
Abstract
A multiple speed reproduction method and apparatus records a multiple speed reference signal to enable a head to accurately scan the position where an I frame is recorded during a multiple speed reproduction. The method and apparatus controls a duty ratio of a control signal which is recorded on a control track, and reproduces the multiple speed reference signal for use by a servo system during the multiple speed reproduction.
Claims9
A multiple speed reproduction method for a video signal, the multiple speed reproduction method comprising the steps of:
- altering a duty ratio of a control signal which is recorded on a control track according to a position of an I frame which is hierarchically recorded on a track;
- generating a phase reference signal for a multiple speed reproduction which indicates a start position of a head for multiple speed reproduction;
- recording the phase reference signal for the multiple speed reproduction on the control track;
- reproducing the phase reference signal for the multiple speed reproduction during the multiple speed reproduction;
- and
- detecting a phase of the phase reference signal for the multiple speed reproduction using a sync reference signal of a drum.
A multiple speed reproduction apparatus for a video signal, the multiple speed reproduction apparatus comprising:
- a pattern generator portion for receiving a recording start signal and a control signal, altering a duty ratio of the control signal, generating a phase reference signal for a multiple speed reproduction which indicates a start position of a head during multiple speed reproduction, and recording the phase reference signal for the multiple speed reproduction on the control track;
- a multiple speed reference signal reproduction portion for reproducing the phase reference signal for the multiple speed reproduction during the multiple speed reproduction;
- and
- a phase detection portion for receiving the phase reference signal for the multiple speed reproduction which is reproduced by said multiple speed reference signal reproduction portion and a drum phase reference signal, and detecting a phase of the phase reference signal for the multiple speed reproduction.
Dependencies are inferred from the claim text.