WO2000060901A2 - Audio peripheral device comprising usb interface and digital audio mixer - Google Patents

Audio peripheral device comprising usb interface and digital audio mixer Download PDF

Info

Publication number
WO2000060901A2
WO2000060901A2 PCT/EP2000/002575 EP0002575W WO0060901A2 WO 2000060901 A2 WO2000060901 A2 WO 2000060901A2 EP 0002575 W EP0002575 W EP 0002575W WO 0060901 A2 WO0060901 A2 WO 0060901A2
Authority
WO
WIPO (PCT)
Prior art keywords
signal
audio
peripheral device
pcm stream
encoded
Prior art date
Application number
PCT/EP2000/002575
Other languages
French (fr)
Other versions
WO2000060901A3 (en
Inventor
Frank C. H. Daems
Wim J. A. Vanspringel
Original Assignee
Koninklijke Philips Electronics N.V.
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
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to JP2000610255A priority Critical patent/JP2002541572A/en
Priority to EP00914164A priority patent/EP1095538A2/en
Priority to KR1020007013844A priority patent/KR20010052623A/en
Publication of WO2000060901A2 publication Critical patent/WO2000060901A2/en
Publication of WO2000060901A3 publication Critical patent/WO2000060901A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]

Definitions

  • the invention relates to an audio peripheral device comprising an USB interface.
  • the invention further relates to a method for supplying a digital audio signal.
  • USB universal serial bus
  • USB Universal Serial Bus
  • Such audio peripheral devices are known in the art.
  • a disadvantage of the known audio peripheral devices is that it is difficult to mix a stereo PCM stream with an encoded (audio) signal as received from the USB bus.
  • an object of the invention is to overcome the disadvantages of the prior art.
  • a first aspect of the invention provides an USB audio peripheral device as claimed in claim 1.
  • a second aspect of the invention provides a method for supplying a digital audio signal as claimed in claim.
  • sample rate converter makes it possible to synchronize the PCM stream to the encoded audio stream.
  • the figure a block schematic example of an USB audio peripheral device
  • An input I is coupled to an USB bus USB for receiving a signal from the bus.
  • the input I is coupled to an USB interface l.
  • the USB interface supplies in this example two signals, that is a first signal SI being a stereo PCM stream and a second signal S2 being an encoded audio stream.
  • the signal SI is supplied to a sample rate converter 3 for amending the sample rate of this signal into a signal SI', to synchronize this signal with signal S2.
  • the signal S2 is supplied to a decoder 5 for decoding the encoded audio stream into a signal S2'.
  • the converted signal SI' and the decoded signal S2' are supplied to inputs of a mixer 7 for mixing these signals into an output signal So to be supplied at an output O.
  • the output can be coupled to loudspeakers for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Information Transfer Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

An audio peripheral device comprising a USB interface is used to couple for example a computer with loudspeakers. An existing problem of known audio peripheral devices is that it is difficult to mix a stereo PCM stream with an encoded (audio) signal as received from the USB bus. The invention provides a solution for this problem by adding a sample rate converter before mixing the different signals.

Description

Audio peripheral device
The invention relates to an audio peripheral device comprising an USB interface.
The invention further relates to a method for supplying a digital audio signal.
USB (universal serial bus) has been developed by the PC industry for interfacing I/O peripherals to a main system for example a personal computer with loudspeakers.
For further information on the USB standard, see Universal Serial Bus, version xx, published by Intel Corporation, Santa Clara, California, USA.
Such audio peripheral devices are known in the art.
A disadvantage of the known audio peripheral devices is that it is difficult to mix a stereo PCM stream with an encoded (audio) signal as received from the USB bus.
It is inter alia an object of the invention is to overcome the disadvantages of the prior art.
To this end a first aspect of the invention provides an USB audio peripheral device as claimed in claim 1. A second aspect of the invention provides a method for supplying a digital audio signal as claimed in claim.
In order to be able to mix this information digitally, a sample rate converter is necessary. Both streams are not synchronized. The sample rate converter makes it possible to synchronize the PCM stream to the encoded audio stream.
In this way it is possible to combine a stereo PCM signal with an encoded signal such as AC3, MPEG2 et al.
Embodiments of a device according to the invention are described in the dependent claims. The invention and additional features, which may be optionally, be used to implement the invention to advantage, will be apparent from and elucidated with references to the examples described below hereinafter and shown in the figure. Herein shows:
The figure a block schematic example of an USB audio peripheral device,
In the figure a block schematic example of an USB audio peripheral device D according to the invention is shown.
An input I is coupled to an USB bus USB for receiving a signal from the bus. The input I is coupled to an USB interface l.The USB interface supplies in this example two signals, that is a first signal SI being a stereo PCM stream and a second signal S2 being an encoded audio stream.
The signal SI is supplied to a sample rate converter 3 for amending the sample rate of this signal into a signal SI', to synchronize this signal with signal S2.
The signal S2 is supplied to a decoder 5 for decoding the encoded audio stream into a signal S2'.
The converted signal SI' and the decoded signal S2' are supplied to inputs of a mixer 7 for mixing these signals into an output signal So to be supplied at an output O. the output can be coupled to loudspeakers for example.
It is to be noticed that above an audio peripheral device according to the invention has been described on the basis of an example. The man skilled in the art will be well aware of a lot of variations, which fall within the scope of the invention.

Claims

CLAIMS:
1. Audio peripheral device comprising an USB interface for receiving a signal from a USB bus and for supplying a first signal being a PCM stream signal and a second signal being an encoded signal, decoding means for decoding the encoded signal, sample rate conversion means for converting the sample rate of the PCM stream signal and mixing means for mixing the decoded signal and the converted PCM stream signal, and output means for supplying a digital audio output signal.
2. Audio peripheral device according to claim 1, characterized in that the received signal from the USB bus also comprises control parameters for controlling the mixing of the decoded signal and the converted PCM stream signal.
3. Audio peripheral device according to claim 1, characterized in that the mixing means are digital mixing means.
4. Method for supplying a digital audio signal receiving a signal from a USB bus, comprising a first signal being a PCM stream signal and a second signal being an encoded signal, decoding the encoded signal, converting the PCM stream signal and mixing the decoded signal and the converted PCM stream signal and supplying the digital audio signal.
PCT/EP2000/002575 1999-04-06 2000-03-21 Audio peripheral device comprising usb interface and digital audio mixer WO2000060901A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2000610255A JP2002541572A (en) 1999-04-06 2000-03-21 Audio peripherals
EP00914164A EP1095538A2 (en) 1999-04-06 2000-03-21 Audio peripheral device comprising usb interface and digital audio mixer
KR1020007013844A KR20010052623A (en) 1999-04-06 2000-03-21 Audio peripheral device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99201035.5 1999-04-06
EP99201035 1999-04-06

Publications (2)

Publication Number Publication Date
WO2000060901A2 true WO2000060901A2 (en) 2000-10-12
WO2000060901A3 WO2000060901A3 (en) 2001-01-25

Family

ID=8240059

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/002575 WO2000060901A2 (en) 1999-04-06 2000-03-21 Audio peripheral device comprising usb interface and digital audio mixer

Country Status (5)

Country Link
EP (1) EP1095538A2 (en)
JP (1) JP2002541572A (en)
KR (1) KR20010052623A (en)
CN (1) CN1304597A (en)
WO (1) WO2000060901A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2889898A1 (en) * 2005-08-18 2007-02-23 Dolphin Integration Sa Analog signal e.g. voice signal, and digital signal e.g. musical background, mixer for loudspeaker, has analog-to-digital converter to convert analog signal into digital signal and provide digital signal at high frequency
WO2014100771A1 (en) * 2012-12-21 2014-06-26 Ikingdom Corp System and method for audio pass-through between multiple host computing devices
US8981199B2 (en) 2010-01-20 2015-03-17 Ikingdom Corp. MIDI communication hub

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647008A (en) * 1995-02-22 1997-07-08 Aztech Systems Ltd. Method and apparatus for digital mixing of audio signals in multimedia platforms
EP0917046A2 (en) * 1997-11-14 1999-05-19 Yamaha Corporation Audio system utilizing personal computer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647008A (en) * 1995-02-22 1997-07-08 Aztech Systems Ltd. Method and apparatus for digital mixing of audio signals in multimedia platforms
EP0917046A2 (en) * 1997-11-14 1999-05-19 Yamaha Corporation Audio system utilizing personal computer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2889898A1 (en) * 2005-08-18 2007-02-23 Dolphin Integration Sa Analog signal e.g. voice signal, and digital signal e.g. musical background, mixer for loudspeaker, has analog-to-digital converter to convert analog signal into digital signal and provide digital signal at high frequency
US7369071B2 (en) 2005-08-18 2008-05-06 Dolphin Integration Analog and digital signal mixer
US8981199B2 (en) 2010-01-20 2015-03-17 Ikingdom Corp. MIDI communication hub
WO2014100771A1 (en) * 2012-12-21 2014-06-26 Ikingdom Corp System and method for audio pass-through between multiple host computing devices
US9524141B2 (en) 2012-12-21 2016-12-20 Ikingdom Corp. System and method for audio pass-through that has at least two USB ports between multiple host computing devices

Also Published As

Publication number Publication date
CN1304597A (en) 2001-07-18
WO2000060901A3 (en) 2001-01-25
EP1095538A2 (en) 2001-05-02
KR20010052623A (en) 2001-06-25
JP2002541572A (en) 2002-12-03

Similar Documents

Publication Publication Date Title
WO1999043147A3 (en) Dual compressed video bitstream camera for universal serial bus connection
KR100367000B1 (en) PC-based codec device for multichannel audio/speech and data with multimedia engine and input/output modules for multimedia data processing
EP0833514A3 (en) Data decoding system and method, transfer device and method, and receiving device and method
AU5333294A (en) Process for transmitting and/or storing digital signals from several channels
GB0416125D0 (en) Communications bridge between a vehicle information network and a remote system
JPH11150788A (en) Audio system
KR102423566B1 (en) A/V interconnect architecture including audio downmixing transmitter A/V endpoints and distributed channel amplification
BR9810806A (en) Ieee top positioning device connector
NL1021391A1 (en) System and method for transmitting a digital video signal.
CN101867691B (en) Set top box
WO2003063158A8 (en) Mixing system for mixing oversampled digital audio signals
BR0006156A (en) Transmission process, apparatus and system
WO2000060901A2 (en) Audio peripheral device comprising usb interface and digital audio mixer
US6389033B1 (en) System and method for performing signal acceleration on an AC link bus
EP0912050A3 (en) Method and apparatus for receiving analog broadcasting by a digital broadcasting receiver
EP0896498A3 (en) Audio signal processing apparatus and audio signal processing method for multi channel audio reproduction system
EP1052796A3 (en) Audio signal converter switching modes in the presence of link impairments in a data communication channel
CN101547321B (en) Device and method for connecting TV and computer
EP1154641A4 (en) Method and apparatus for digital signal processing
KR100827675B1 (en) Multimedia soc built-in plc module
WO1999020006A3 (en) Single-chip audio circuits, methods, and systems using the same
AU5823099A (en) Management of trick playback of digital video data
EP1524770A2 (en) Method and apparatus for transmitting digital audio signals
EP1146741A4 (en) Method and apparatus for digital signal processing
KR20050111375A (en) An analog gateway for most network

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 00800498.6

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): CN JP KR

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2000914164

Country of ref document: EP

Ref document number: 1020007013844

Country of ref document: KR

AK Designated states

Kind code of ref document: A3

Designated state(s): CN JP KR

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWP Wipo information: published in national office

Ref document number: 2000914164

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1020007013844

Country of ref document: KR

WWW Wipo information: withdrawn in national office

Ref document number: 2000914164

Country of ref document: EP

WWR Wipo information: refused in national office

Ref document number: 1020007013844

Country of ref document: KR