Transcoder Segmentation for Simultaneous H.264 Recording and Playback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing image data recording/playback systems that employ a semi-duplex transcoder for higher compression formats like H.264 struggle to perform simultaneous recording and playback operations due to the transcoder's inability to operate both encoding and decoding functions simultaneously, which is necessary for functions like chasing playback and simultaneous recording/playback.
Innovation Solution
The system incorporates a decoder capable of handling both first and second format image data, using the storage device as a buffer to enable simultaneous input/output operations by alternately performing encoding and decoding processes, allowing the decoder to handle MPEG2 image data while the transcoder processes H.264 data, thus enabling the realization of chasing playback and simultaneous recording/playback functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a semi-duplex transcoder is used to achieve higher compression format (H.264), then storage efficiency is improved, but the ability to perform simultaneous recording and playback is lost
Solution Approach 1:
The transcoder function is segmented into two separate components: a first transcoder for encoding and a second transcoder for decoding. This allows encoding and decoding operations to occur simultaneously through parallel processing, resolving the contradiction between storage efficiency and simultaneous recording/playback capability.
Solution Approach 2:
The system achieves multi-functionality by implementing both encoding and decoding capabilities within the transcoder unit. The first transcoder encodes input signals to H.264 format for storage, while the second transcoder decodes stored H.264 data for playback, enabling the system to perform both recording and playback operations simultaneously.
2Device complexity
If encoding and decoding are performed by the same transcoder, then device complexity is reduced, but operational versatility is worsened
Solution Approach 1:
The transcoder is divided into two separate transcoders: a first transcoder dedicated to encoding operations and a second transcoder dedicated to decoding operations. This segmentation enables both encoding and decoding functions to operate simultaneously without interference, improving operational versatility while maintaining relatively simple device structure.
Solution Approach 2:
The system merges the functionality of separate encoding and decoding devices into a unified transcoder unit that contains both a first transcoder for encoding and a second transcoder for decoding. This combination achieves both encoding and decoding capabilities within a single integrated device.
Data Source
AI summary
An image data recording/playback device, including a decoder that decodes image data encoded in a first format; and a transcoder capable of encoding image data, supplied from the decoder and encoded in the first format, into a second format whose compression rate is higher than the compression rate of the first format and outputting the image data encoded into a second format to the decoder and, of decoding image data supplied from the decoder and encoded in the second format, outputting it to the decoder, and alternately carrying out the encoding processing and the decoding processing, wherein: the decoder inputs/outputs image data encoded in the first and second format; and the decoder simultaneously inputs or outputs image data encoded in the first format when inputting or outputting image data encoded in the second format.