Video Playback Trick Mode Indicator for Stop Pause Distinction
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Solution Overview
Problem
Existing video playback systems face difficulties in distinguishing between stop and pause commands, as the decoder is not under the control of the recorder/player, leading to uncertainty in display order and frame handling.
Innovation Solution
A video recording and playback system that includes a memory device with a controller and processor to manage trick mode indicators, allowing users to communicate stop and pause commands effectively by setting and clearing a trick mode indicator in packetized video data, enabling the decoder to differentiate between these commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the recorder/player stops sending frames in response to both stop and pause commands, then both commands can be implemented, but the decoder cannot distinguish between stop and pause commands
Solution Approach 1:
The patent introduces a trick mode indicator as an intermediary element in the packet data structure. This indicator acts as a mediator that carries command distinction information from the recorder/player to the decoder without interfering with the video frame data itself. When a pause command is received, the system sets the trick mode indicator in the packet; when a stop command is received, the indicator is cleared. This allows the decoder to distinguish between the two commands even though both result in stopping frame transmission.
2Extent of automation
If the decoder is not under the control of the recorder/player, then decoder independence is maintained, but the decoder cannot determine display order and frame handling for pause commands
Solution Approach 1:
The patent implements a feedback mechanism where the recorder/player sends control information (the trick mode indicator) along with the video data stream to the decoder. This feedback loop allows the decoder, while remaining independent in its decoding operations, to receive explicit control signals about the intended display behavior. The decoder reads the trick mode indicator from incoming packets and adjusts its frame handling accordingly, maintaining both independence and precise control.
3Reliability
If a trick mode indicator is added to packetized video data, then stop and pause commands can be distinguished, but packet data structure complexity increases
Solution Approach 1:
The patent merges the command control information with the existing packetized video data structure rather than creating a separate control channel. The trick mode indicator is integrated into the packet format that already carries video data, allowing command distinction information to be combined with the video stream. This merging approach increases reliability by ensuring command information travels with the data it controls, while minimizing the added complexity by reusing the existing packet infrastructure.
Data Source
AI summary
The invention provides a video recording and playback system comprising a video storing and retrieving device coupled to a video display device so as to provide the video display device with frames of video data for display. The video storing and retrieving device includes at least one memory capable of storing frames of video data, comprising packets according to a format. The format provides a trick mode indicator. A controller is coupled to the memory and controls operations of the memory. A user control device is operable with the controller to allow a user to communicate stop and pause commands to the controller. A processor cooperates with the controller so as to clear the trick mode indicator of at least one retrieved packet in response to the stop command. The processor cooperates with the controller to set the trick mode indicator of at least one retrieved packet in response to the pause command.