WO2005079065A1 - Digital set top box having sound stereo encoder - Google Patents

Digital set top box having sound stereo encoder Download PDF

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Publication number
WO2005079065A1
WO2005079065A1 PCT/KR2005/000375 KR2005000375W WO2005079065A1 WO 2005079065 A1 WO2005079065 A1 WO 2005079065A1 KR 2005000375 W KR2005000375 W KR 2005000375W WO 2005079065 A1 WO2005079065 A1 WO 2005079065A1
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WO
WIPO (PCT)
Prior art keywords
sound
signal
top box
set top
digital
Prior art date
Application number
PCT/KR2005/000375
Other languages
French (fr)
Inventor
Duck Su Oh
Original Assignee
Lg Innotek Co., Ltd.
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 Lg Innotek Co., Ltd. filed Critical Lg Innotek Co., Ltd.
Publication of WO2005079065A1 publication Critical patent/WO2005079065A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F24F7/013—Ventilation with forced flow using wall or window fans, displacing air through the wall or window
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/007—Two-channel systems in which the audio signals are in digital form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/20—Details or features not otherwise provided for mounted in or close to a window
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • H04N5/40—Modulation circuits

Definitions

  • the present invention relates to a digital set top box, and more particularly, to a digital settop box with a sound stereo encoder that outputs all of sound stereo signals transmitted from a digital tuner to a digital TV after modulating the sound stereo signals using a RF modulator.
  • a digital TV system includes a digital set top box for receiving a digital signal and a digital TV for outputting a digital image.
  • the digital set top box includes an amplifying unit for amplifying an RF signal inputted through an antenna, a digital tuner for outputting an image base band signal and a sound base band signal by modulating the amplified RF signal, a microcomputer for outputting a control signal, a power supplying unit for supplying power, an RF modulating unit for converting the image and sound base band signals into image and sound signals using the control signal outputted from the microcomputer, and an RF outputting unit for outputting the modulated image and sound signals to the digital TV.
  • the digital TV is designed to display a channel signal of a channel by selecting the image and sound signal inputted as an RF input.
  • the sound base signal outputted from the digital tuner is however inputted as a monophonic signal into the RF modulating unit and the frequency of the inputted sound signal is modulated to 15 KHz. Therefore, the prior set top box has a problem in that it cannot modulate a high frequency sound stereo signal such as a sound sap signal and a stereophonic signal. Disclosure of Invention Technical Problem
  • the present invention has been made in an effort to solve the above-described problem. It is an object of the present invention to provide a digital set top box that can perfectly modulate even a sound stereo signal having a high frequency.
  • a sound stereo signal such as a monophonic signal (L+R), a sound sap signal, and stereophonic signal (L-R)
  • L-R stereophonic signal
  • a digital set top box comprising a digital tuner outputting an image base band signal and a sound base band signal; a controller providing a control signal; a power supplying unit supplying power; a sound stereo encoder receiving the sound and image base band signals from the digital tuner and outputting a reference frequency signal and a sound stereo signal; an RF modulator receiving the reference frequency signal, the sound stereo signal, the image base signal, and the control signal, modulating the signals into image and sound signals and outputting the image and sound signals; and an RF outputting unit outputting the image and sound signals from the RF modulator to a digital TV.
  • a digital set top box comprising a power supplying unit supplying power; a digital tuner outputting sound and image base band signals; a sound stereo encoder receiving the sound and image base band signals from the digital tuner and outputting a reference frequency signal and a sound stereo signal; an RF modulator receiving the reference frequency signal, the sound stereo signal, the image base signal, and the control signal and outputting image and sound signals.
  • a digital set top box comprising a digital tuner; a sound stereo encoder encoding sound and image base band signals outputted from the digital tuner to output a reference frequency signal and a sound stereo signal; and an RF modulator modulating the sound stereo signal according to the reference frequency signal into sound and image signals and outputting the sound and image signals to a digital TV.
  • FIG. 1 is a block diagram of a digital set top box according to the present invention.
  • FIG. 2 is a view illustrating a connection relation between a power line, sound stereo encoder and RF modulator of a digital set top box according to the present invention.
  • FIG. 3 is a view illustrating a connection relation between a sound stereo encoder and an RF modulator of a digital set top box according to the present invention. Best Mode for Carrying Out the Invention
  • FIG. 1 shows a block diagram of a digital set top box according to the present invention.
  • the inventive digital set top box includes a booster amplifying unit 110, a digital tuner 120, a microcomputer 130, a power supplying unit 140, a sound stereo encoder 150, an RF modulator 160, an RF outputting unit 170.
  • the booster amplifying unit 110 is designed to amplify an RF signal inputted through an antenna ANT. Although the booster amplifying unit 110 is not the essential element, it can provide an advantage of improving the performance of the set top box by amplifying the signal from the antenna ANT.
  • the digital tuner 120 is designed to modulate an RF signal inputted through the booster amplifying unit 110 and the RF outputting unit 170 and transmit the modulated RF signal as an image base band signal and a sound base band signal.
  • a wire connecting the RF outputting unit 170 to the digital tuner 120 is omitted in the drawing to avoid the complication of the drawing.
  • the microcomputer 130 is designed to output a serial data address/serial clock(SDA/SCL) signal that is a control signal.
  • the power supplying unit 140 is designed to supply the power.
  • the sound stereo encoder 150 is operated by the power supplied from the power supplying unit 140 to output a reference frequency signal and a sound stereo signal by receiving a left/right sound base band signal and a image base band signal that are outputted from the digital tuner 120.
  • the RF modulator 160 is operated by the power supplied from the power supplying unit 140 to modulate the image base band signal from the digital tuner 120 and a SDA/ SCL signal from the microcomputer 130 and output the signals as the image signal and the sound stereo signal.
  • the RF is designed to modulate the encoded sound stereo signal using the reference frequency signal.
  • the RF modulator 160 can be applied to both of UHF and NHF signals.
  • the internal structuree of the RF modulator 160 can be varied according to the signal format. However, it should be noted that the RF modulator 160 is designed functioning to modulate any signals regardless of the signal format.
  • the RF outputting unit 170 is designed to output the image and sound stereo signals from the RF modulator 160 to the digital TN 200 or output the RF signal from the antenna A ⁇ T to the digital tuner 120.
  • FIG. 2 is a view illustrating a connection relation between the power line and the sound stereo encoder and the RF modulator of the digital set top box according to the present invention.
  • a regulator 180 and high capacitors CI, C2 and C3 that can remove a sound hum and stabilize the power by removing noise and ripple.
  • FIG. 3 shows a connection relation between the sound stereo encoder and the RF modulator of a digital set top box according to the present invention.
  • a band pass filter 190 that can remove the harmonics of the reference frequency, which are generated in the sound stereo encoder 150.
  • the sound stereo encoder 150 When the left/right sound base band signal and the image base band signal that are outputted from the digital tuner 120 are inputted to the sound stereo encoder 150, the signals are combined in the sound stereo encoder 150 and outputted as a sound stereo signal.
  • the sound stereo signal and the reference frequency (4MHz) are inputted from the sound stereo encoder 150 to the RF modulator 160.
  • the image base band signal is inputted from the digital tuner 120 to the RF modulator 160.
  • the RF modulator 160 modulates the inputted signals and outputs the modulated signals to the digital TV through the RF outputting unit 170.
  • the sound hum is generated from the sound signal of the RF modulator
  • the noise and ripple contained in the power supplied from the power supplying unit 140 and the sound buzz is generated by the horizontal frequency component (15.734KHz) of the image base band signal outputted from the digital tuner 120.
  • the band pass filter 190 is connected between the sound stereo encoder 150 and the RF modulator 160 to prevent the generation of the harmonics.
  • the digital set top box is characterized in that the sound stereo encoder for encoding the sound signal is further provided. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Abstract

Disclosed is a digital set top box including a sound stereo encoder enabling an audience to effectively hear a sound stereo. By the digital set top box of the present invention, all formats of the sound signals can be modulated and outputted by an RF modulator.

Description

Description
DIGITAL SET TOP BOX HAVING SOUND STEREO ENCODER
Technical Field
[1] The present invention relates to a digital set top box, and more particularly, to a digital settop box with a sound stereo encoder that outputs all of sound stereo signals transmitted from a digital tuner to a digital TV after modulating the sound stereo signals using a RF modulator.
Background Art
[2] Generally, a digital TV system includes a digital set top box for receiving a digital signal and a digital TV for outputting a digital image.
[3] The digital set top box includes an amplifying unit for amplifying an RF signal inputted through an antenna, a digital tuner for outputting an image base band signal and a sound base band signal by modulating the amplified RF signal, a microcomputer for outputting a control signal, a power supplying unit for supplying power, an RF modulating unit for converting the image and sound base band signals into image and sound signals using the control signal outputted from the microcomputer, and an RF outputting unit for outputting the modulated image and sound signals to the digital TV.
[4] The digital TV is designed to display a channel signal of a channel by selecting the image and sound signal inputted as an RF input.
[5] In the prior digital set top box, the sound base signal outputted from the digital tuner is however inputted as a monophonic signal into the RF modulating unit and the frequency of the inputted sound signal is modulated to 15 KHz. Therefore, the prior set top box has a problem in that it cannot modulate a high frequency sound stereo signal such as a sound sap signal and a stereophonic signal. Disclosure of Invention Technical Problem
[6] The present invention has been made in an effort to solve the above-described problem. It is an object of the present invention to provide a digital set top box that can perfectly modulate even a sound stereo signal having a high frequency.
[7] It is another object of the present invention to provide a digital set top box that can enable a TV audience to heat a stereo sound by modulating a sound stereo signal such as a monophonic signal (L+R), a sound sap signal, and stereophonic signal (L-R), and a telemetry signal using an RF modulating unit and outputting the modulated signal to the digital TV. Technical Solution
[8] According to an aspect of the present invention, there is provided a digital set top box comprising a digital tuner outputting an image base band signal and a sound base band signal; a controller providing a control signal; a power supplying unit supplying power; a sound stereo encoder receiving the sound and image base band signals from the digital tuner and outputting a reference frequency signal and a sound stereo signal; an RF modulator receiving the reference frequency signal, the sound stereo signal, the image base signal, and the control signal, modulating the signals into image and sound signals and outputting the image and sound signals; and an RF outputting unit outputting the image and sound signals from the RF modulator to a digital TV.
[9] According to another aspect of the present invention, there is provided a digital set top box comprising a power supplying unit supplying power; a digital tuner outputting sound and image base band signals; a sound stereo encoder receiving the sound and image base band signals from the digital tuner and outputting a reference frequency signal and a sound stereo signal; an RF modulator receiving the reference frequency signal, the sound stereo signal, the image base signal, and the control signal and outputting image and sound signals.
[10] According to still another aspect of the present invention, there is provided a digital set top box comprising a digital tuner; a sound stereo encoder encoding sound and image base band signals outputted from the digital tuner to output a reference frequency signal and a sound stereo signal; and an RF modulator modulating the sound stereo signal according to the reference frequency signal into sound and image signals and outputting the sound and image signals to a digital TV. Advantageous Effects
[11] According to a digital set top box of the present invention, it can be possible that all of sound stereo signals are modulated by an RF modulator and outputted to a digital TN.
[12] As a result, the audience can hear all of the sound signals regardless of the format limitation of the sound signal. Brief Description of the Drawings
[13] FIG. 1 is a block diagram of a digital set top box according to the present invention;
[14] FIG. 2 is a view illustrating a connection relation between a power line, sound stereo encoder and RF modulator of a digital set top box according to the present invention; and
[15] FIG. 3 is a view illustrating a connection relation between a sound stereo encoder and an RF modulator of a digital set top box according to the present invention. Best Mode for Carrying Out the Invention
[16] A digital set top box according to the present invention will be described in more detail in conjunction with the accompanying drawings. [17] FIG. 1 shows a block diagram of a digital set top box according to the present invention.
[18] Referring to FIG. 1, the inventive digital set top box includes a booster amplifying unit 110, a digital tuner 120, a microcomputer 130, a power supplying unit 140, a sound stereo encoder 150, an RF modulator 160, an RF outputting unit 170.
[19] The booster amplifying unit 110 is designed to amplify an RF signal inputted through an antenna ANT. Although the booster amplifying unit 110 is not the essential element, it can provide an advantage of improving the performance of the set top box by amplifying the signal from the antenna ANT.
[20] The digital tuner 120 is designed to modulate an RF signal inputted through the booster amplifying unit 110 and the RF outputting unit 170 and transmit the modulated RF signal as an image base band signal and a sound base band signal. Here, it should be noted that a wire connecting the RF outputting unit 170 to the digital tuner 120 is omitted in the drawing to avoid the complication of the drawing.
[21] The microcomputer 130 is designed to output a serial data address/serial clock(SDA/SCL) signal that is a control signal. The power supplying unit 140 is designed to supply the power.
[22] The sound stereo encoder 150 is operated by the power supplied from the power supplying unit 140 to output a reference frequency signal and a sound stereo signal by receiving a left/right sound base band signal and a image base band signal that are outputted from the digital tuner 120.
[23] The RF modulator 160 is operated by the power supplied from the power supplying unit 140 to modulate the image base band signal from the digital tuner 120 and a SDA/ SCL signal from the microcomputer 130 and output the signals as the image signal and the sound stereo signal. At this point, the RF is designed to modulate the encoded sound stereo signal using the reference frequency signal. In addition, the RF modulator 160 can be applied to both of UHF and NHF signals. The internal structuree of the RF modulator 160 can be varied according to the signal format. However, it should be noted that the RF modulator 160 is designed functioning to modulate any signals regardless of the signal format.
[24] The RF outputting unit 170 is designed to output the image and sound stereo signals from the RF modulator 160 to the digital TN 200 or output the RF signal from the antenna AΝT to the digital tuner 120.
[25] FIG. 2 is a view illustrating a connection relation between the power line and the sound stereo encoder and the RF modulator of the digital set top box according to the present invention.
[26] Referring to FIG. 2, provided on the power line extending from the power supplying unit 140 are a regulator 180 and high capacitors CI, C2 and C3 that can remove a sound hum and stabilize the power by removing noise and ripple.
[27] Disposed between the power line extending from the power supplying unit 140 and the sound stereo encoder 150 are an inductor LI and a capacitor C4 that can remove a sound buzz generated by a horizontal frequency of the image base band signal.
[28] FIG. 3 shows a connection relation between the sound stereo encoder and the RF modulator of a digital set top box according to the present invention.
[29] Referring to FIG. 3, provided between the sound stereo encoder 150 and the RF modulator 160 is a band pass filter 190 that can remove the harmonics of the reference frequency, which are generated in the sound stereo encoder 150.
[30] The operation of the digital set top box according to the present invention will be described hereinafter in more detail.
[31] When the left/right sound base band signal and the image base band signal that are outputted from the digital tuner 120 are inputted to the sound stereo encoder 150, the signals are combined in the sound stereo encoder 150 and outputted as a sound stereo signal. Here, the sound stereo signal includes a mono (monophonic=L+R) signal, a sound sap signal, a stereo sound (stereophonic=L-R) signal, and a telemetry signal.
[32] The sound stereo signal and the reference frequency (4MHz) are inputted from the sound stereo encoder 150 to the RF modulator 160. The image base band signal is inputted from the digital tuner 120 to the RF modulator 160. The RF modulator 160 modulates the inputted signals and outputs the modulated signals to the digital TV through the RF outputting unit 170.
[33] As a result, it becomes possible to hear the stereo sound from the digital TV 200.
[34] Meanwhile, the sound hum is generated from the sound signal of the RF modulator
160 by the noise and ripple contained in the power supplied from the power supplying unit 140 and the sound buzz is generated by the horizontal frequency component (15.734KHz) of the image base band signal outputted from the digital tuner 120.
[35] In order to remove such a variety of noise, by providing the regulator 160 and the high capacitors CI, C2 and C3 on the power line extending from the output of the power supplying unit 140, the generation of the sound hum can be prevented. In addition, by connecting the inductor LI and the capacitor C4 to the power line inputted to the sound stereo encoder 150, the generation of the sound buzz can be prevented.
[36] In addition, when the sound stereo signal is inputted from the sound stereo encoder
150 to the RF modulator 160, since the harmonics are generated in the reference frequency and inputted into the RF modulator 160, the band pass filter 190 is connected between the sound stereo encoder 150 and the RF modulator 160 to prevent the generation of the harmonics.
[37] According to the present invention, since the sound stereo encoder is installed in the digital set top box, all of the sound stereo signals (the mono (monophonic=L+R), sound sap, stereo sound (stereophonic=L+R), and telemetry signals) outputted from the digital tuner are modulated by the RF modulator and outputted to the digital TN, the audience can hear the stereo sound.
[38] In addition, even when the sound stereo encoder is installed in the digital set top box, since the harmonics of the reference frequency can be removed by inserting the band pass filter into the output of the sound stereo encoder and the noise and ripple contained in the power can be removed by the regulator, capacitors and inductor, the audience can hear the more fine sound. Mode for the Invention
[39] The digital set top box is characterized in that the sound stereo encoder for encoding the sound signal is further provided. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Industrial Applicability
[40] According to the present invention, by providing the sound stereo encoder in the digital set top box, all of the sound stereo signals outputted from the digital tuner are modulated by the RF modulator and outputted to the digital TN, thereby making it possible for the audience to hear the stereo sound regardless of the sound signal format.
[41]
[42]

Claims

Claims
[1] A digital set top box comprising: a digital tuner outputting an image base band signal and a sound base band signal; a controller providing a control signal; a power supplying unit supplying power; a sound stereo encoder receiving the sound and image base band signals from the digital tuner and outputting a reference frequency signal and a sound stereo signal; an RF modulator receiving the reference frequency signal, the sound stereo signal, the image base signal, and the control signal, modulating the signals into image and sound signals and outputting the image and sound signals; and an RF outputting unit outputting the image and sound signals from the RF modulator to a digital TV. [2] The digital set top box according to claim 1, further comprising a band pass filter disposed between the sound stereo encoder and the RF modulator. [3] The digital set top box according to claim 1, further comprising a regulator and a capacitor provided on a power line extending from the power supplying unit to remove noise. [4] The digital set top box according to claim 1, further comprising an inductor and a capacitor provided between the power supplying unit and the sound stereo encoder to remove a sound buzz. [5] The digital set top box according to claim 1, further comprising a booster amplifying unit amplifying the RF signal inputted through the antenna. [6] The digital set top box according to claim 1, wherein the sound base signal comprises a left/right sound base band signal. [7] The digital set top box according to claim 1, wherein the control signal is a serial data address/serial clock signal. [8] The digital set top box according to claim 1, wherein the RF outputting unit is designed to transmit an RF signal outputted from the antenna to the digital tuner. [9] A digital set top box comprising: a power supplying unit supplying power; a digital tuner outputting sound and image base band signals; a sound stereo encoder receiving the sound and image base band signals from the digital tuner and outputting a reference frequency signal and a sound stereo signal; and an RF modulator receiving the reference frequency signal, the sound stereo signal, the image base signal, and the control signal and outputting image and sound signals. [10] The digital set top box according to claim 9, further comprising a filter provided between the sound stereo encoder and the RF modulator to remove harmonics of the reference frequency signal. [11] The digital set top box according to claim 9, further comprising a regulator and a capacitor provided on an output line of the power supplying unit [12] The digital set top box according to claim 9, further comprising an inductor and a capacitor provided between the power supplying unit and the sound stereo encoder to remove a sound buzz. [13] A digital set top box comprising: a digital tuner; a sound stereo encoder encoding sound and image base band signals outputted from the digital tuner to output a reference frequency signal and a sound stereo signal; and an RF modulator modulating the sound stereo signal according to the reference frequency signal into sound and image signals and outputting the sound and image signals to a digital TV. [14] The digital set top box according to claim 13, further comprising a filter provided between the sound stereo encoder and the RF modulator to remove harmonics of the reference frequency signal.
PCT/KR2005/000375 2004-02-17 2005-02-07 Digital set top box having sound stereo encoder WO2005079065A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040010235A KR20050081933A (en) 2004-02-17 2004-02-17 Digital set top box for having sound stereo encoder
KR10-2004-0010235 2004-02-17

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WO2005079065A1 true WO2005079065A1 (en) 2005-08-25

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4603349A (en) * 1984-12-04 1986-07-29 General Instrument Corporation Cable television system with stereo sound reproduction
US5796423A (en) * 1995-07-14 1998-08-18 General Instrument Corporation System for integrating digital audio and analog video to provide seamless user transparent features

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4603349A (en) * 1984-12-04 1986-07-29 General Instrument Corporation Cable television system with stereo sound reproduction
US5796423A (en) * 1995-07-14 1998-08-18 General Instrument Corporation System for integrating digital audio and analog video to provide seamless user transparent features

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"CD-quality digitally controlled TV stereo sound processor.", CONSUMER ELECTRONICS,IEEE., vol. 37, no. 3, August 1991 (1991-08-01), pages 692 - 696 *

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