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Details, datasheet, quote on part number:Ziva-5
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Datasheet text preview:
ZiVA-5 DVD-Audio
October 2000
Part Number: ZiVA5-WP-DVDAUD-0.1
INTRODUCTION
The digital audio revolution was started by the Compact Disc Digital Audio (CDDA) format in 1982. The CDDA 2-channel stereo format has been extremely successful and has been accepted as the replacement for the legacy vinyl album format. DVD-Audio will now take digital audio to the next step with new features such as true multi-channel high-resolution audio, visual menus, lyrics and high-resolution still pictures. DVD-Audio brings the unprecedented sound quality and fullness of the live music experience into the home. Together, DVD-Video and DVD-Audio technologies will become the center of high-quality home entertainment. Using the new C-Cube ZiVA-5 DVD System Processor, consumer electronics manufacturers can introduce products that will play both DVD-Video and DVD-Audio discs across the full price-point spectrum of consumer DVD products.
TECHNOLOGY BACKGROUND
With any new technology and format come new specifications and terminology. Key DVD-Audio specifications, contrasted with CDDA, are listed in Table 1.
Table 1: DVD-Audio Specifications versus CDDA Specifications
Specification Disc type DVD-Audio Single-sided, single-layer: 4.7GB Single-sided, double-layer: 8.5 GB Double-sided, single-layer: 9.4 GB Double-sided, double layer: 17 GB Variable: - Up to 86 hours of stereo audio - More than 74 minutes of multichannel audio Up to 9.6 Mbps Linear Pulse Code Modulation (LPCM) Meridian Lossless packing (MLP) Dolby Digital, DTS, MPEG stereo, MPEG multi-channel Up to 6 channels 48 kHz, 96 kHz, 192 kHz; or 44.1 kHz, 88.2 kHz, 176.4 kHz 48 kHz, 96kHz; or 44.1 kHz, 88.2 kHz 12, 16, 20 or 24 bits 0 96 kHz 144 dB CDDA 650 MB
Play time
Fixed: - 74 minutes of stereo audio 1.4 Mbps Pulse Code Modulation (PCM) N/A N/A 2 channels (stereo only) 44.1 kHz N/A 16 bits 5 22.05 kHz 96 dB
Bit rate Uncompressed audio format Advanced compressed audio format Optional audio formats Audio channels Sampling Frequency, 2-channel Sampling rate, multi-channel Sample resolution Frequency response Dynamic range
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The listed specifications are quite impressive once they are understood in terms of listening experience. CDDA quality sound is good, but the frequency response and dynamic range of DVD-Audio takes sound quality to the next level, as discussed below.
Sampling Frequency and Frequency Response
The human ear can detect sound up to approximately 20 kHz. The frequency response of a sampled signal is ½ the sampling frequency. The CDDA sampling frequency of 44.1 kHz gives a frequency response of 22.05 kHz. Although this is above the hearing limits of typical human detection, complaints of "flat" or "metallic" sound have circulated around CDDA since its inception, in part due to lack of frequencies above 22.05 kHz. DVD-Audio takes the sampling frequency up to 192 kHz, resulting in a frequency response of 96 kHz. This increase in frequency content of music will bring out sounds that are not possible with CDDA. See Figure 1.
Sample Resolution
Sample resolution determines how accurate amplitudes can be reproduced. CDDA has a 16-bit sample resolution that can render a total of 65,536 equally spaced amplitudes or 96dB of dynamic range. DVD-Audio, with up to 24-bit sample resolution, can render a total of 16,777,216 equally spaced amplitudes or 144dB of dynamic range. This drastically reduces distortion and allows the DVD-Audio player to accurately reproduce sounds that are not possible with CDDA. See Figure 1.
144dB (24-bit)
Dynamic Range
96dB (16-bit)
DVD-Audio Music Spectrum
CDDA Music Spectrum
22.05kHz
96kHz
Frequency Response
Figure 1: DVD-Audio and CDDA Music Spectrums
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