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KR-102963856-B1 - A SIGNALING SYSTEM FOR EXPANDING AUDIO SERVICE ACCEPTANCE THROUGH THE EXPANDSION OF THE SHORT ID FIELD OF MDI IN DISTAL RADIO SYSTEMS

KR102963856B1KR 102963856 B1KR102963856 B1KR 102963856B1KR-102963856-B1

Abstract

A signaling system for expanding audio service acceptance through the expansion of the Short Id field of MDI in a digital radio system according to the present invention is a signaling system for expanding audio service acceptance through the expansion of the Short Id field of MDI in a digital radio system comprising a server-side signaling generator that generates a Multiplex Distribution Interface (MDI) stream in a digital radio broadcasting system, wherein the signaling generator changes the field using the Short Id in the Fast Access Channel (FAC) and Service Description Information (SDI) protocols to expand the Short Id field indicating the service Id in the MDI from 2 bits to 4 bits, thereby having the effect of improving transmission efficiency and scalability.

Inventors

  • 이우철
  • 조남희
  • 권동현

Assignees

  • 주식회사 마루이엔지

Dates

Publication Date
20260512
Application Date
20251204

Claims (10)

  1. In a signaling system for expanding audio service capacity through the expansion of the Short Id field of MDI in a digital radio system including a server-side signaling generator that generates an MDI (Multiplex Distribution Interface) stream in a digital radio broadcasting system, The above signal generator To extend the Short Id field indicating the service ID in the above MDI from 2 bits to 4 bits, modify the fields using Short Id in the FAC (Fast Access Channel) and SDI (Service Description Information) protocols, A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing the number of bits of the Short Id and Stream Id related fields of each data entity using the Short Id in the above MDI from 2 bits to 4 bits, and adjusting the number of bits of the reserved fields defined as rfa (reserved for future assignment), rfu (reserved for future use), or reserved to secure the number of bits for the expansion of the Short Id and Stream Id fields.
  2. delete
  3. In Article 1, The above signal generator Change the channel parameters in the TAG Value item of the above FAC from the number of services to 5 bits, and change the rfu field from 1 bit to 0 bits, and A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing service parameters from 2 bits to 4 bits for the Short Id and from 6 bits to 4 bits for the rfa field.
  4. In Article 1, The above signal generator A signaling system for expanding audio service capacity through the expansion of the Short Id field of an MDI in a digital radio system characterized by changing the number of Stream Descriptions in the Service description channel information of the above MDI from a maximum of 4 to a maximum of 16.
  5. In Article 1, The above signal generator A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system characterized by changing the Short Id field from 2 bits to 4 bits and changing the rfu field from 2 bits to 0 bits in the label data of the above MDI.
  6. In Article 1, The above signal generator A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing the Short Id field from 2 bits to 4 bits in the conditional access parameters data of the above MDI and adding a reserved field of 6 bits.
  7. In Article 1, The above signal generator A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing the Short Id field from 2 bits to 4 bits and the Stream Id field from 2 bits to 4 bits in the Application information data of the above MDI, and adding the above rfu field 4 bits.
  8. In Article 1, The above signal generator A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing the Short Id field from 2 bits to 4 bits, changing the Stream Id field from 2 bits to 4 bits, and changing the rfa field from 1 bit to 5 bits in the audio information data of the MDI.
  9. In Article 1, The above signal generator A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing the Short Id field from 2 bits to 4 bits and changing the rfa field from 2 bits to 0 bits in the language and country data of the MDI.
  10. In Article 1, The above signal generator A signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system, characterized by changing the Stream Id field from 2 bits to 4 bits and changing the rfu field from 2 bits to 0 bits in the Packet stream FEC parameters data of the MDI.

Description

A signaling system for expanding audio service acceptance through the expansion of the short ID field of MDI in digital radio systems The present invention relates to a digital radio broadcasting system (DRM-R) and an ATSC 3.0-based audio service transmission technology, and more specifically, to a signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system that can transmit more audio services in a single multicast stream by expanding the Short Id field used for identifying audio services within a Multiplex Distribution Interface (MDI) stream. In MDI (Multiplex Distribution Interface), the service ID is displayed using the Short ID field. This field consists of 2 bits and can represent up to 4 services. That is, as shown in Fig. 1, the digital radio broadcasting system (DMR-R: (Digital Radio Mondiale-Receiver)) is configured to have up to four audio services configured in a single MDI (Multiplex Distribution Interface) stream. The Digital Radio Mondiale (DRM) service, which operated in the existing FM & AM frequency bands, was limited to 2 bits because it only supported up to 190kbps due to frequency band issues, and could only carry four audio services of 24kbps, 32kbps, and 64kbps. There is a problem in that it is difficult to expand service capacity because existing digital radio broadcasting systems (DRM) or DRM+ based systems are designed to allow only up to four audio services to be configured in a single MDI stream due to limitations in FM/AM frequency bands. In other words, the 2-bit Short ID field limitation is a design optimized for older DRM environments, and it becomes a critical constraint on the expansion of multicast audio services in systems with sufficient bandwidth, such as the latest ATSC 3.0. Therefore, in ATSC 3.0-based digital broadcasting systems, sufficient bandwidth is secured, and as the demand for audio services increases rapidly, it is necessary to accommodate more audio services in a single MDI stream. When the current 2-bit Short ID maps an MDI stream to a specific multicast address (IP Multicast Address), it can only bind a maximum of four audio services to that address. For example, to provide 16 audio services, a total of four separate multicast addresses are required. An increase in multicast addresses has the problem of proportionally increasing the overhead of signaling data to describe each stream, and 4 multicasts cause 4 times the signaling load compared to 1 multicast. In addition, as the number of radio services to be provided increases, the number of required multicast addresses increases linearly, leading to the problem of increased operational complexity and burden, such as network equipment configuration and address management. Figure 1 is a diagram showing the Short Id field of the service ID in a conventional MDI (Multiplex Distribution Interface) configured as 2 bits. FIG. 2 is a block diagram of a transmission diagram that can expand an MDI Short Id from 2 bits to 4 bits according to the present invention. FIG. 3 is a diagram illustrating a DCP and an MDI stream structure to explain a signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system according to the present invention. FIG. 4 is a diagram illustrating the channel parameters and service parameters of the TAG Value in a signaling system for expanding audio service acceptance through the expansion of the Short Id field of MDI in a digital radio system according to the present invention. FIG. 5 is a diagram illustrating the expansion of a TAG Name in a signaling system for expanding audio service acceptance through the expansion of the Short Id field of an MDI in a digital radio system according to the present invention. Figure 6 is table data of items to be modified in a signaling system for expanding audio service acceptance through the expansion of the Short Id field of MDI in a digital radio system according to the present invention. Figure 7 is a diagram showing the Short Id field of the Service Id in the MDI (Multiplex Distribution Interface) according to the present invention configured as 4 bits. Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. Herei