Broadcast IP Data Flow Segmentation for Reference Clock Acquisition
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Solution Overview
Problem
The conventional MMT scheme struggles to efficiently transmit high-precision reference clock information, leading to increased processing time and potential jitter in the reception apparatus.
Innovation Solution
A transmission method that generates a stream with multiple Internet Protocol (IP) data flows, each corresponding to a service in broadcast, and transmits this stream in a determined channel, allowing the reception apparatus to process only the IP data flow corresponding to the desired service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conventional MMT scheme transmits reference clock information through a single multiplexed stream, then all services can be transmitted together, but the reception apparatus must process all IP data flows to acquire reference clock information, increasing processing time and complexity
Solution Approach 1:
The transmission stream is segmented into multiple separate IP data flows, with each flow dedicated to a specific service. The reference clock information is transmitted only in the IP data flow corresponding to the desired service, allowing the reception apparatus to process only the relevant flow and acquire reference clock information faster without examining all services.
Solution Approach 2:
The reference clock information is extracted from the multiplexed stream and placed exclusively in the IP data flow corresponding to the desired service. This extraction allows the reception apparatus to obtain reference clock information directly from the relevant service flow without processing other services, reducing processing time and complexity.
2Productivity
If the conventional MMT scheme multiplexes multiple services in a single stream, then bandwidth utilization is efficient, but the reception apparatus cannot selectively process only the desired service's data flow
Solution Approach 1:
The single multiplexed stream is divided into multiple separate IP data flows, with each flow dedicated to a specific service. This segmentation enables the reception apparatus to selectively process only the IP data flow corresponding to the desired service, improving ease of operation while maintaining efficient bandwidth utilization through dedicated flows.
Solution Approach 2:
Each IP data flow is given a specific quality characteristic by dedicating it to a particular service. The reference clock information is placed only in the relevant IP data flow, allowing the reception apparatus to easily identify and process the desired service by examining only that specific flow's characteristics.
3Reliability
If the reception apparatus processes all IP data flows to acquire reference clock information, then no information is missed, but processing complexity and time increase significantly
Solution Approach 1:
The reference clock information is extracted and transmitted exclusively in the IP data flow corresponding to the desired service. This extraction ensures that the reception apparatus acquires the correct reference clock information reliably from the relevant service without the complexity of searching through all IP data flows, maintaining reliability while reducing processing complexity.
Data Source
AI summary
A transmission method includes: generating a stream including a plurality of Internet Protocol (IP) data flows corresponding one-to-one with a plurality of services in broadcast, the IP data flows storing the corresponding services of the plurality of services; and transmitting the generated stream in a predetermined channel.