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1. (WO2018140206) SINGLE-BIT VOLUME CONTROL
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Pub. No.: WO/2018/140206 International Application No.: PCT/US2018/012401
Publication Date: 02.08.2018 International Filing Date: 04.01.2018
IPC:
H03M 5/12 (2006.01) ,H03M 5/14 (2006.01) ,H03M 7/50 (2006.01) ,H03M 5/08 (2006.01) ,H03M 1/68 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
5
Conversion of the form of the representation of individual digits
02
Conversion to or from representation by pulses
04
the pulses having two levels
06
Code representation, e.g. transition, for a given bit cell depending only on the information in that bit cell
12
Biphase level code, e.g. split phase code, Manchester code; Biphase space or mark code, e.g. double frequency code
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
5
Conversion of the form of the representation of individual digits
02
Conversion to or from representation by pulses
04
the pulses having two levels
14
Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
7
Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
30
Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
50
Conversion to or from non-linear codes, e.g. companding
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
5
Conversion of the form of the representation of individual digits
02
Conversion to or from representation by pulses
04
the pulses having two levels
06
Code representation, e.g. transition, for a given bit cell depending only on the information in that bit cell
08
Code representation by pulse width
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
M
CODING, DECODING OR CODE CONVERSION, IN GENERAL
1
Analogue/digital conversion; Digital/analogue conversion
66
Digital/analogue converters
68
with conversions of different sensitivity, i.e. one conversion relating to the more significant digital bits and another conversion to the less significant bits
Applicants:
DUEWER, Bruce [US/US]; US (US)
KAMKAR, Shafagh [IR/US]; US (US)
HESTER, Dylan [US/US]; US (US)
CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. [GB/GB]; 7B Nightingale Way Quartermile Edinburgh EH3 9EG, GB (AllExceptUS)
Inventors:
DUEWER, Bruce; US
KAMKAR, Shafagh; US
HESTER, Dylan; US
Agent:
SMITH, Darren; US
PRATI, Danny; US
BARRETT, Michael; US
MCLELLAN, Peter; US
LIN, Steven; US
Priority Data:
15/706,21515.09.2017US
62/451,97230.01.2017US
62/461,38921.02.2017US
Title (EN) SINGLE-BIT VOLUME CONTROL
(FR) COMMANDE DE VOLUME À UN SEUL BIT
Abstract:
(EN) Audio content in a single-bit audio stream can be reproduced at a transducer by mapping the single-bit audio stream to symbols in a multi-bit audio stream. Volume control may be implemented, in part, in the digital domain and, in part, in the analog domain. In the digital domain, when converting the single-bit audio stream to a plurality of symbols, the plurality of symbols is selected based, at least in part, on audio content of the single-bit audio stream and a desired volume level. In the analog domain, when converting an analog current signal output from a current- steering DAC processing the plurality of symbols to an analog voltage signal, an analog gain value may be selected based, at least in part, on the desired volume level.
(FR) Un contenu audio dans un flux audio à un seul bit peut être reproduit au niveau d'un transducteur par mise en correspondance du flux audio à un seul bit avec des symboles dans un flux audio multi-bits. La commande de volume peut être mise en œuvre, en partie, dans le domaine numérique et, en partie, dans le domaine analogique. Dans le domaine numérique, lors de la conversion du flux audio à un seul bit en une pluralité de symboles, la pluralité de symboles est sélectionnée sur la base, au moins en partie, du contenu audio du flux audio à un seul bit et d'un niveau sonore souhaité. Dans le domaine analogique, lors de la conversion d'une sortie de signal de courant analogique provenant d'un CNA de direction de courant traitant la pluralité de symboles en un signal de tension analogique, une valeur de gain analogique peut être sélectionnée sur la base, au moins en partie, du niveau sonore souhaité.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)