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单词 dsd
释义 DictionarySeesignal-to-noise ratio

DSD


DSD

(Direct Stream Digital) The sampling technique used in Sony's high-resolution SACD music format. Although SACD discs never took off and new ones are few and far between, the DSD format is used to encode music for high-quality downloads. Increasingly, Blu-ray players and music servers can decode the format. Digital DSD files use DFF and DSF extensions, the latter holding meta-data.

From 44 Thousand to Millions of Samples
For standard CDs, music is digitized 44.1 thousand times per second, producing 16-bit PCM samples. In contrast, DSD uses pulse density modulation (PDM) to encode 2,822,400 1-bit samples per second (64 times the CD sampling rate). Each DSD sample is a 1 or 0 (either up or down from the previous sample). Compared to CDs, DSD boosts frequency response from 20 kHz to 100 kHz and dynamic range from 96 to 120 db. See PCM, PDM and CD.

Even Higher Sampling Rates
No longer confined to a physical disc, DSD resolutions have gone beyond SACD (see table below). The DSD's one-bit sampling generates a very low signal-to-noise ratio, and "noise shaping" shifts the noise to a high frequency that is filtered out before the final output. The advantage to higher sampling is that the noise is spread out over a wider frequency band, and the filtering can be relaxed. High-end DSD players offer multiple filtering modes to accommodate high-res DSD files. See SACD, DSD DAC, DXD, DoP, signal-to-noise ratio and high-resolution audio.
 MultiplesDSD of CD Number ofFormat Samples ---1-Bit Samples--- SACD (DSD64) 64 2,822,400 (2.8 MHz) Double-rate (DSD128) 128 5,644,800 (5.6 MHz) Quad-rate (DSD256) 256 11,289,600 (11.2 MHz) Octuple-rate (DSD512) 512 22,579,920 (22.5 MHz)

DSD


DSD

Abbreviation for dry sterile dressing.

disorder of sex development

,

DSD

The technical, preferred term for hermaphroditism or pseudohermaphroditism.
FinancialSeeCD

DSD


AcronymDefinition
DSDDirect Store Delivery
DSDDirect Stream Digital (Sony digital audio format)
DSDDeutsches Sprachdiplom (German: German Language Diploma)
DSDDevelopment Services Department (various locations)
DSDDecision Support Database
DSDDavis School District (Utah)
DSDDelta Sigma Delta (dental fraternity)
DSDDuales System Deutschland (German)
DSDDistrict of South Dakota (judiciary)
DSDDevelopment Services Division (various locations)
DSDDisorders of Sex Development
DSDDirect Stream Digital
DSDData Security Division
DSDDigital Self Defense
DSDDigital Services and Development Unit
DSDDeveloper Services Division
DSDDedicated Server for Domino
DSDDetailed Systems Design
DSDDirection de la Solidarité Départementale (French: Departmental Directorate for Solidarity)
DSDDigital System Design
DSDDisability Services Division (various locations)
DSDDivision of Student Development (various schools)
DSDDrainage Services Department (Hong Kong)
DSDDepartment of Sustainable Development (UN)
DSDDuct Smoke Detector
DSDDangerous Substances Directive
DSDDrop Size Distribution
DSDDefense Signals Directorate (AU)
DSDDirector of Staff Development
DSDDaggett School District (Utah)
DSDDefense Systems Division
DSDData Structure Diagram
DSDDocument Structure Description (XML)
DSDDeputy Secretary of Defense
DSDDistance Selling Directive (consumer legislation; EU)
DSDDirectorate of Staff Duties
DSDDevelopmental Special Duties
DSDDigital Solutions Division (various companies)
DSDDécoupes Systèmes Diamant (French: Diamond Cutting Systems)
DSDDigestive System Disorder
DSDDelaware School for the Deaf
DSDDetailed System Design
DSDDetonation Shock Dynamics
DSDDecision Sight Distance (road design)
DSDDynamic Separation of Duty
DSDDear Step Daughter
DSDDry Sterile Dressing
DSDDivision of Shortage Designation
DSDDigital Service Drive (software)
DSDDefence Studies Department (UK Joint Services Command and Staff College)
DSDDaily Security Dialogue
DSDDrug Strategy Directorate (UK)
DSDDigital Sharing Device
DSDDrivers Safety Device
DSDDynamic Service Delete
DSDDecimated Signal Diagonalization
DSDDropShip Direct (direct mail distribution and logistics company)
DSDDouble Shoulder Disarticulation
DSDDeed to Secure Debt (mortgage type)
DSDData Sharing Device
DSDDrug-Sniffing Dog
DSDData Specification Document
DSDDesign Specification Documents
DSDDedicated Server Domino
DSDDirect Services Dialing
DSDDeep Submergence Device
DSDDistrict Security Division
DSDData Standards Definition
DSDDrop Ship Delivery
DSDData Schema Diagram
DSDDistrict Secretary's Division (Sri Lanka)
DSDData Systems Designator
DSDData Source Definition
DSDDab Session Designs
DSDDoctor in Social Development (various universities)
DSDDouble Stamp Day
DSDData Service Delivery (Sprint)
DSDDemi-Séisme de Dimensionnement (French: Half Earthquake Design; nuclear energy industry)
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更新时间:2024/12/23 23:58:31