Separate Counters for Continuous Sub-Audio Playback
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Solution Overview
Problem
Conventional reproducing apparatuses struggle to seamlessly reproduce background music during forward or reverse play in browsable slide shows, often causing interruptions due to the resetting of the system time clock, which affects the synchronization of still image and audio data.
Innovation Solution
A reproducing apparatus and method that utilize separate counters for mainstream and sub audio data, including a sub audio arrival time clock counter and system time clock counter, to depacketize and decode sub audio data independently of the mainstream data, ensuring continuous playback of background music.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system time clock is reset during forward or reverse play in browsable slide shows, then the still image data can be synchronized to the correct position, but the sub audio data (background music) becomes desynchronized and playback is interrupted
Solution Approach 1:
The patent separates the time management functions into two independent counters: a system time clock counter for mainstream data (still images) and a sub audio arrival time clock counter for background music. This segmentation allows each counter to independently manage its respective data stream without interference, resolving the contradiction between synchronization accuracy and continuous playback reliability.
Solution Approach 2:
The patent introduces an intermediary mechanism where the sub audio arrival time clock counter acts as a dedicated time reference for sub audio data, mediating between the mainstream data timing and sub audio playback timing. This intermediary prevents the direct impact of system time clock resets on sub audio synchronization.
2Device complexity
If a single system time clock is used for both mainstream data and sub audio data, then the device complexity is reduced, but the ability to maintain independent synchronization for each data type is compromised
Solution Approach 1:
The patent divides the time management function into two separate counters: one for mainstream data and one for sub audio data. This segmentation provides independent synchronization capability for each data type while maintaining relatively simple device architecture by using dedicated counters rather than complex synchronization protocols.
Solution Approach 2:
Each counter serves multiple functions: the system time clock counter manages mainstream data timing and packetization, while the sub audio arrival time clock counter manages sub audio data timing and packetization. This multi-functionality allows independent synchronization without requiring additional dedicated hardware for each function.
3Speed
If the system time clock is adjusted during playback, then the playback position can be changed quickly, but the sub audio data synchronization is disrupted
Solution Approach 1:
By segmenting the time management into independent counters, the patent allows rapid adjustment of the system time clock counter for playback position changes without affecting the sub audio arrival time clock counter, thereby maintaining sub audio continuity while achieving fast playback position changes.
Solution Approach 2:
The patent prepares separate time management structures in advance (two independent counters), enabling rapid playback position changes to be executed by simply adjusting the system time clock counter without requiring subsequent synchronization corrections that would disrupt sub audio playback.
Data Source
AI summary
A reproducing apparatus and method includes a reproducing unit to reproduce mainstream data and sub audio data separately added in the mainstream data, wherein the reproducing unit comprises a counter used in reproducing the sub audio data. Accordingly, it is possible to more naturally reproduce still image data, such as a browsable slide show, to which sub audio data is additionally included, thus preventing an interruption in reproduction of the sub audio data even during a forward or reverse play.