Digital Signal Editing Action List for Undo Redo Management
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Solution Overview
Problem
Existing digital signal editing programs require users to manually undo and redo operations, which can be tedious and prone to errors, especially when multiple operations need to be reversed or re-applied in a specific order, making it difficult to maintain the correct state of the data.
Innovation Solution
A digital signal data-editing program that displays an action list of operations, allowing users to easily view, modify, and manage the order of operations without disturbing the last performed operation, enabling undo and redo functions that maintain the integrity of the operation sequence, and providing features like toggling operations on/off and visual representation of operation effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traditional undo feature is used to reverse multiple operations, then the data can be placed back into previous states, but the user must manually re-do operations which is tedious and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-recording all editing operations in an action list with their parameters and sequence information before they are needed for replay. When a user wants to revert to a previous state, the system has already captured all necessary operation details (including precise parameters like selection ranges, filter settings, and transformation values) so they can be automatically replayed without manual re-entry, thus resolving the time loss issue while maintaining reliable state management
2Reliability
If the user manually re-applies operations after undoing, then the operations can be re-performed, but the precision required makes exact repetition extremely difficult and error-prone
Solution Approach 1:
The patent applies copying by creating a digital record (copy) of each operation's complete parameter set and execution context in the action list. Instead of requiring users to manually recreate operations, the system stores precise copies including selection ranges, filter parameters, transformation values, and timing information. When replay is needed, these copied operation definitions are automatically executed, ensuring exact repetition without manual intervention, thus resolving both the accuracy and ease of operation issues
3Loss of information
If the program remembers the state of data prior to each operation, then the undo feature can reverse operations, but the user cannot easily select and replay specific operations without manually re-invoking features
Solution Approach 1:
The patent applies segmentation by dividing the continuous operation history into discrete, independently manageable operation entries in the action list. Each operation is segmented with its own identifier, parameter set, and execution context, allowing users to selectively view, edit, or replay specific operations rather than managing a monolithic operation history. This segmentation reduces the complexity of operation management by providing clear boundaries and individual control over each operation while maintaining complete historical information
Data Source
AI summary
Techniques for changing operations performed relative to digital signal data that represents a recording of a signal are provided. A digital signal data-editing program displays an ordered list of items. Each item in the list corresponds to one or more operations that a user has instructed the program to perform relative to the digital signal data. The order of the items in the list determines the order in which the operations corresponding to those items are performed relative to the digital signal data. In response to user input, the program may perform a change such as inserting a new item into the list, removing an existing item from the list, altering the order of one or more items in the list, etc. The program subsequently modifies the display of the list to reflect the change. The change may be performed without disturbing the last-ordered item in the list.