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(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, signal-to-noise ratio and high-resolution audio.
           MultiplesDSD          of CD        Number ofFormat      Samples  ---1-Bit Samples---

 (DSD64)        64    2,822,400 (2.8 MHz)

 (DSD128)      128    5,644,800 (5.6 MHz)

 (DSD256)      256   11,289,600 (11.2 MHz)

 (DSD512)      512   22,579,920 (22.5 MHz)
References in periodicals archive ?
The Flybits powered DFF Miracle Gala & Concert app enables users to receive and engage with timely, relevant, context-aware features including: red carpet highlights, live voting, artist bios and social media accounts, sharable images, direct car service options, auction items and more.
delivery meet the needs of the target groups and create the impact in line with the DFF project goals.
Indeed, the overwhelming response to DFF 2015 that was attended by tens of thousands of visitors from different nationalities is testimony to the growing popularity of the festival.
This year's DFF, which was held across the city in February, saw tens of thousands of residents and visitors enjoying the cuisine dished out by home-grown restaurant concepts and pop-up stores.
When asked what he thought his chances of winning at DFF are, Khaled says it's going to be "difficult because there are lots of good films in the contest".
He also believes that the BBC should ensure MediaCity becomes a hub for multimedia production along the lines of the DFF.
During this time, the PIP input value should correspond to the Prediction Output Value (not shown in Figure 3) so that the DFF value does not change.
Reprinted (as "Why Gays [as a Group] Are Morally Superior to Christians [as a Group]") in DFF, 153-155; HR, 519-521.
0 kg 25 Watts Waveforms: Low-band VHF, voice AFF, voice/data DFF, FM (F3E) Encryption: Advanced digital voice and data frequency hopping/encryption Notes: 10 channel presets, -20dB whisper mode, field programming, radio-radio cloning Wavepac L-3 Linkabit 1.
DFF 2009 was a tremendous success as it gathered the attention of thousands of high-profile socialites, fashionistas, models, designers, media and even actors and actresses.
Since logic circuits in almost all SoCs consist of clock synchronized circuits, when a DFF becomes nonvolatile, all logic circuits can become nonvolatile.