EP1676432A2 - Multiplexed audio and data transmission over digital content delivery channels - Google Patents

Multiplexed audio and data transmission over digital content delivery channels

Info

Publication number
EP1676432A2
EP1676432A2 EP20040794805 EP04794805A EP1676432A2 EP 1676432 A2 EP1676432 A2 EP 1676432A2 EP 20040794805 EP20040794805 EP 20040794805 EP 04794805 A EP04794805 A EP 04794805A EP 1676432 A2 EP1676432 A2 EP 1676432A2
Authority
EP
Grant status
Application
Patent type
Prior art keywords
audio
content
data
system
data content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20040794805
Other languages
German (de)
French (fr)
Inventor
Riza Dr. Director of Systems Eng. AKTURAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sirius XM Radio Inc
Original Assignee
Sirius XM Radio Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/18523Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H20/00Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/30Arrangements for simultaneous broadcast of plural pieces of information by a single channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H20/00Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65Arrangements characterised by transmission systems for broadcast
    • H04H20/71Wireless systems
    • H04H20/74Wireless systems of satellite networks

Abstract

Systems and methods for multiplexing content from variable-rate audio channels with content from one or more data channels uses an audio/data multiplexing module. This module time-multiplexes multiple audio and data channels into a single data channel output, and send it to a logical channel. The audio and data packets in the multiplexed signal are tagged on packets of audio or data information within the multiplexed signal. Receive modules receive and select a single logical channel for output. These modules include audio/data de-multiplexing modules that receive and de-multiplex the multiplexed audio and data content from a logical channel into separate paths, where the users of such systems can listen to audio content while at the same time receiving data content; such as artist pictures or weather information.

Description

MULTIPLEXED AUDIO AND DATA TRANSMISSION OVER DIGITAL CONTENT DELIVERY CHANNELS This invention relates to methods and systems for transmission of signals comprising combined, multiplexed audio and data content to a plurality of receivers that can output both the audio and data content of such signals from a common channel. These systems and methods are especially useful for transmitting, receiving and outputting such signals from terrestrial and satellite transmitters of Satellite Digital Audio ' Radio Systems (SDARS). The following patents and patent applications related to these systems are hereby incorporated by reference as though fully set forth here: U.S. Patent No. Title Issue Date 6,564,053 Efficient High Latitude Service Area Satellite Mobile May 13, 2003 Broadcasting Systems 6,023,616 Satellite Broadcast Receiver System Feb. 8, 2000

5,864,579 Digital Radio Satellite And Terrestrial Ubiquitous Jan. 26, 1999 Broadcasting System Using Spread Spectrum Modulation 5,794, 138 Satellite Broadcast System Rcccivei Aug 1 1 , 1998

5,592,471 Mobile Radio Receivers Using Time Diversity To Jan. 7, 1997 Avoid Service Outages In Multichannel Broadcast Transmission Systems 5,485,485 Radio Frequency Broadcasting Systems And Jan. 16, 1996 Methods Using Two Low-Cost Geosynchronus Satellites And Hemispherical Coverage Antennas 5,319,673 Radio Frequency Broadcasting Systems And Jun. 7, 1994 Methods Using Two Low-Cost Geosynchronus Satellites

EPO Patent Title Date Of Pub. EP 0959 573 A2 System For Efficiently Broadcasting Via Satellite To Nov. 24, 1999 EP 990303823 Mobile Receivers In Service Areas At High Latitude

Int'l. Pub. No. Title Intl. Pub. Date

WO 01/33729 Al Method And System For Providing Geographic Specific Services In 10 May 2001 A Satellite Communications Network

WO 01/33720 A3 Method And Apparatus For Selectively Operating Satellites In 10 May 2001 Tundra Orbits To Reduce Receiver Buffering Requirements For Time Diversity Signals

Satellite Digital Audio Radio Services (SDARS), such as those provided by Sirius Satellite Radio Inc. and XM Satellite Radio, Inc, are examples of wireless content delivery systems that use satellite and terrestrial transmitters to deliver signals comprising audio and data content to receivers located at or near the earth's surface. In such systems, receivers often work better with satellite signal transmissions in rural areas, and with terrestrial signal transmission in more urbanized areas. SDARS systems provide various broadcast content (i.e. audio and data) delivery services over a large system service area, e.g. CONUS (the mainland United States). Signal delivery is made to subscribing receivers within a system service area from geostationary or geo -synchronous satellite networks, simultaneously with ground-based terrestrial signal delivery networks. Although this invention could be applicable to a wide range of digital signal transmission systems, preferred embodiments relate to SDARS systems.

Delivery of signals comprising audio content and signals comprising data content over digital media transmission channels has heretofore been made over separate logical channels for the audio content and the data content. Such delivery precludes receiving both audio and data content from the same logical channel.

This invention provides systems and methods to transmit, receive and output audio and data content from a single logical channel. Preferred embodiments comprise a transmission module that can transmit multiple logical channels, with each channel delivering signals comprising both audio and data content. Such a transmission module multiplexes, preferably in separate packets, content from one or more audio channels, with content from one or more data channels, using an audio/data multiplexer module. This module time-multiplexes the selected multiple audio and data channels into a single output signal for delivery to a common transmission channel.

SDARS systems use variable rate audio coders. Thus, in SDARS, the multiplexer preferably accommodates variable rate audio and variable rate data transmissions. For example, when a user tunes to an SDARS channel to listen to audio, the user can also receive data in the same logical channel transmission mechanism. An example of such data is a digital picture of the artist performing a currently-playing song. More generally, the data may include information about currently-playing or to-be-played audio information, or other text such as information about currently active channels carrying e.g. weather, graphics, or news.

The data content may contain the picture or a graphical representation of the artist of the currently playing song on the audio channel; the data may also contain other types of data that may be relevant to the user such as weather text or graphics. Time- multiplexed audio content and data content are preferably tagged with headers to denote the content type in a given packet of information transmitted from the multiplexed channel.

Preferred embodiments also comprise receiver modules that can receive and select a single logical channel. These modules comprise an audio/data de-multiplexer module that receives and de-multiplexes signals comprising multiplexed audio and data content from a logical channel into separate paths. A user can choose to output from a receiver one of the following channels: a single audio channel, or a single data channel, or a multiplexed audio and data channel in which case the data content is output prom a data port on the receiver while the user is listening to the audio content from an audio port.

Identification information of the signal from each logical channel can be transmitted from a service channel, enabling a receiver to monitor and learn the content type of each logical channel when signal reception begins and while signal reception is ongoing.

In SDARS, for example, these systems and methods can multiplex music and the musician's picture or video over the same logical SDARS channel. Only one physical and logical channel demodulator is needed in the receiver for reception of this combined audio and data. The receiver may also output audio and data from separate' audio and data ports.

BRIEF DESCRIPTION OF THE DRAWINGS

This invention can be better understood by reference to the accompanying drawing, which illustrates an embodiment of a combined audio/data content transmission module and a combined audio/data content reception module. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The drawing shows transmission module 10 that multiplexes content from selected audio channels 11 and 12 with content from one or more data channels 13 and 14 using an audio/data multiplexing module. After audio to data conversion and variable- rate coding of the audio content at blocks 15 and 16, and processing of the data from blocks 13 and 14 at blocks 17 and 18, module 10 time-multiplexes the selected audio and multiple data channels at block 19 into a single output signal 20, and sends the combined content signal, via logical channelization 21, to physical channelization and transmission 22.

Receive module 30 receives and selects single logical channel 32. Module 30 includes audio/data de-multiplexing module 31 that receives, and physically dechannelizes the signal at block 39, and de-multiplexes the multiplexed audio and data content from logical channel 32 into separate paths 33 and 34. If the selected logical channel is an audio-only or a data-only channel, the content is sent to its proper audio decoding or data processing route. If the selected channel is a multiplexed channel, the receiver outputs variable-rate audio content 36 and data content 37 from a single path, or from separate multiple paths, to an output port or device after passing the audio content packets from audio A/D (analog-to-digital) converter/decoder 35 and after passing the data content from data processing module 38.

Claims

1. A system comprising a transmission module for outputting combined variable-rate audio content and data content in a common channel comprises: at least one source for audio content; at least one source for data content; a multiplexer for combining said audio content and said data content into a multiplexed signal on a common channel; and a system for transmitting said multiplexed signal with combined audio and data content to a plurality of receivers located at or near the earth's surface.
2. The system of claim 1 further comprising a satellite system for transmitting said signal.
3. The system of claim 2 wherein said satellite system is an SDARS.
4. The system of claim 1 further comprising means for forming packets of said audio content and of said data content in said multiplexed signal, with each packet including an identifier.
5. A method for transmitting a multiplexed signal comprising both audio content and data content comprises: multiplexing audio content and data content to form a signal of combined audio and data content; and delivering said signal over a common channel.
6. The method of claim 4 further comprising selecting an SDARS channel as said common channel.
7. A system comprising a module for receiving and selecting a single logical channel comprises: a demultiplexing module for demultiplexing a multiplexed signal comprising audio content and data content; and an output system linked to said demultiplexing module for delivering said audio content and said data content onto separate output paths for a plurality of receivers located at or near the earth's surface.
8. The system of claim 8 further comprising a satellite system for transmitting said signal.
9. The system of claim 7 or claim 8 further comprising: a system comprising a transmission module for outputting combined audio content and data content in a common channel comprises: at least one source for audio content; at least one source for data content; a multiplexer for combining said audio content and said data content into a multiplexed signal on a common channel; and a system for transmitting said signal with combined audio and data content to a plurality of receivers located at or near the earth's surface.
10. The system of claim 1 further comprisiong: at least one source for variable rate audio content; at least one source for data content, comprising information about currently- playing or to-be-played audio.
EP20040794805 2003-10-22 2004-10-12 Multiplexed audio and data transmission over digital content delivery channels Withdrawn EP1676432A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US69124203 true 2003-10-22 2003-10-22
PCT/US2004/033549 WO2005043881A3 (en) 2003-10-22 2004-10-12 Multiplexed audio and data transmission over digital content delivery channels

Publications (1)

Publication Number Publication Date
EP1676432A2 true true EP1676432A2 (en) 2006-07-05

Family

ID=34549874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040794805 Withdrawn EP1676432A2 (en) 2003-10-22 2004-10-12 Multiplexed audio and data transmission over digital content delivery channels

Country Status (2)

Country Link
EP (1) EP1676432A2 (en)
WO (1) WO2005043881A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9955570B2 (en) 2015-01-09 2018-04-24 Apple Inc. Features of a flexible connector in a portable computing device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5239540A (en) * 1990-11-27 1993-08-24 Scientific-Atlanta, Inc. Method and apparatus for transmitting, receiving and communicating digital data signals with corresponding program data signals which describe the digital data signals
FR2723279B1 (en) * 1994-07-29 1996-09-06 Europ Agence Spatiale emission of Digital Satellite System
US5886995A (en) * 1996-09-05 1999-03-23 Hughes Electronics Corporation Dynamic mapping of broadcast resources
US6618367B1 (en) * 1999-12-16 2003-09-09 Agere Systems Inc. Transmission frame structure for a satellite digital audio radio system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005043881A2 *

Also Published As

Publication number Publication date Type
WO2005043881A3 (en) 2006-07-06 application
WO2005043881A2 (en) 2005-05-12 application

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