Disk Recorder Transport Command Auto-Cueing
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Solution Overview
Problem
Cueing content segments on magnetic disk storage systems is cumbersome and time-consuming, as operators must manually monitor and actuate Rewind and Fast-Forward buttons to align the address pointer with the beginning or end of a segment, similar to traditional tape recorders.
Innovation Solution
A method using conventional transport commands, where actuating specific buttons (STOP, Rewind, and Fast-Forward) automatically aligns the content segment's address pointer with the beginning or end block, eliminating the need for operator monitoring through a look-up table that stores block addresses and manages the pick-up arm's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual monitoring and actuation of Rewind and Fast-Forward buttons is used to cue content segments, then the operator can locate specific sections, but the process is cumbersome and time-consuming
Solution Approach 1:
The system performs self-service by automatically detecting content segment boundaries and positioning the address pointer without requiring continuous operator monitoring. The microprocessor monitors transport commands and automatically cues segments when conditions are met, eliminating the need for operator intervention in the cueing process.
Solution Approach 2:
The system uses feedback from transport commands (Play, Stop, Record, Fast-Forward, Rewind) to automatically detect when content segments begin or end. The microprocessor monitors these commands and uses this feedback information to automatically position the address pointer at segment boundaries, resolving the contradiction between speed and ease of operation.
2Measurement precision
If the address pointer is manually aligned with content segment boundaries through monitoring, then precise cueing is achieved, but the process requires continuous operator attention
Solution Approach 1:
The system automatically performs the alignment function by monitoring transport commands and detecting segment boundaries without operator intervention. The microprocessor self-manages the address pointer positioning based on detected Play, Stop, Record, Fast-Forward, or Rewind commands, achieving precise alignment while eliminating operator time requirements.
Solution Approach 2:
The system performs preliminary detection of segment boundaries by monitoring transport commands before the operator needs to cue a segment. When a Play, Stop, Record, Fast-Forward, or Rewind command is detected, the system proactively positions the address pointer at the appropriate segment boundary, so the alignment is already complete when the operator initiates cueing.
3Adaptability or versatility
If standard VTR transport commands are used to operate a disk recorder, then interface compatibility is improved, but automatic cueing functionality must be implemented
Solution Approach 1:
The system achieves universality by making the disk recorder respond to standard VTR transport commands (Play, Stop, Record, Fast-Forward, Rewind) in the same way traditional VTRs do. This multi-functionality allows the disk recorder to operate with standard VTR interfaces while the microprocessor automatically implements cueing functionality, resolving the contradiction between compatibility and complexity.
Data Source
AI summary
Briefly, there is provided a method for manipulating content stored on a disk recorder/playback device using conventional transport commands, such as those used on a conventional videotape recorder (VTR). The method commences by detecting whether the content is in one of a prescribed set of modes, and by determining whether one of a stop, normal motion, a first rapid motion or second rapid motion buttons has been actuated. Depending on which of the stop, normal motion, a first rapid mode or second rapid motion buttons, the content is advanced in one of a first and second directions. The motion of the content is controlled in accordance with the detected content mode and to the degree to which one of the first rapid motion mode and second motion mode buttons has been actuated.