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Yamaha to Ship New Digital Surround Decoder LSIs
for a Whole Range of Surround Sound Components |
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Yamaha Digital Surround Decoder LSI, YSS942
Sample price: ¥3000, excluding tax
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Tokyo, Japan, March 5, 2003 – Yamaha Corp. announced today that it has developed two new digital surround decoder LSIs and will begin sample shipments March 10. The ultra-low power YSS942 and YSS941 can be applied to a whole range of surround sound components, from high end A/V amplifiers to popular home theater in a box systems.1
The development of these two products coincides with the global proliferation of DVD players and the start of BS digital broadcasting in Japan, both of which make use of surround sound technologies. The two new decoder chips, which are compatible with all relevant broadcasting technologies are expected to be popular with consumer electronics companies for a wide range of end-user products. Yamaha projects initial sales at a million units per year.
| Product Name |
Product # |
Sample Price |
Shipment Date |
| Yamaha Digital Surround Decoder LSI |
YSS942 |
¥3000 |
Monday, March 10
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| YSS941 |
¥2800 |
YSS942/941 is a digital surround decoder LSI for A/V amplifiers and other home theater components with an integrated architecture that can decode Dolby Digital2, DTS3 and every other existing digital surround format by using one chip.
It is capable of 0.15μ micro processing thanks to a high-precision floating point DSP core newly developed by the Company. In addition, all the codes for decoding every existing digital surround processing format are built in as ROM, and with working RAM handling other necessary processes, the YSS942/941 has minimized the amount of packaging required by components.
Even with a high-speed working frequency of 180 MHz, noise from signal bleed is negligible and digital signal processing is pure because built-in ROM and RAM allow high speed signal lines to remain confined within the chip.
The YSS942/941 incorporates a variety of functions on one chip for a digital surround LSI that makes fully integrated usage possible. An auto-detector built in as hardware intelligently activates the decoder that corresponds to the format of the signal being inputted and begins decoding. Bass management4 is also built into the architecture. It handles optional successive processing for sound field DSP, headphone DSP and other functions by using the processing capacity remaining after digital sound decoding is complete.
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Details follow:
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| 1. |
Compatible with all digital surround processing formats
With installation in home theater components, one chip processes digital sound fields for all digital surround formats, including formats used by digital broadcasting and the latest DVDs.
Compatible with the following formats:
Dolby Digital, Dolby Digital EX, Dolby Pro Logic (48 kHz/96 kHz)5, Dolby Pro Logic II (48kHz/96kHz), AAC6, DTS, DTS-ES Discrete 6.1, DTS-ES Matrix 6.1, DTS 96/247, DTS 96/24-ES Matrix 6.1, Neo:6 (48kHz/96kHz)8
YSS942 is compatible with all of the above formats, YSS941 with all except DTS 96/24 and DTS 96/24-ES Matrix 6.1.
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High-speed, high-performance signal processing with ultra-low power consumption
Taking advantage of the latest in 0.15μ micro processing, high-speed, high performance 32-bit floating point signal processing has been achieved at a working frequency of 180 MHz, while at the same time keeping power consumption to an ultra-low 1.2 V / 250 mW (when processing DTS 96/24 and Neo:6). This configuration has made the YSS942/941 compatible with a wide range of products, from high end A/V amplifiers to popular home theater in a box systems.
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All major functions incorporated into ROM and RAM
All digital surround processing decoders are located in ROM, and other processes are handled by the built-in working RAM, minimizing the number of peripherals, simplifying the layout, and reducing unnecessary radiant noise.
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An array of functions all on a single chip
A wide range of features demanded by today's audio and video components are all integrated into a single chip. The features include an auto-detector which automatically responds to differing surround processing formats; a lip sync function that compensates for the lag in time between on-screen mouth movements and the projected sound, a problem sometimes caused by processing digital images for plasma televisions and other appliances; surround program DSP, which adds various effects to the sound after it's decoded; virtual surround that creates surround-like sound even without rear speakers; and headphone DSP which allows headphone users to experience surround-like sound. Additionally, program RAM ensures that the chip will be able to respond to future specification upgrades and makes it possible to download original sound field programs.
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Development Background
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The global proliferation of DVD players along with the start of BS digital broadcasting has brought digital surround sound into the mainstream. Led by movies, there are increasing numbers of DVDs that can be experienced in Dolby Digital 5.1, DTS or other 5.1 channel digital surround formats. The frequency of TV programs that can be enjoyed in 5.1 channel digital surround is also on the rise.
At present, in addition to the widespread penetration of Dolby Digital and DTS with DVDs and BS digital broadcasting, new technologies are being introduced. These include 6.1 channel expanded formats like Dolby Digital EX and DTS-ES, which add a rear center sound field, DTS 96/24 which meets demands for even better sound quality by increasing the sampling frequency to 96 kHz, and DTS 96/24-ES, an advanced expanded surround format which combines 6.1 channel surround with the high sound quality of 96 kHz sampling.
Yamaha's YSS924/941 is a high performance decoder LSI that in one chip is compatible with all the above formats, greatly facilitating system design. The Company expects this chip to be extremely attractive to consumer electronics manufacturers that produce everything from high end A/V amplifiers to home theater in a box systems.
Yamaha is a market leader in a wide range of home theater products. Its products range from the groundbreaking CinemaStation series, the first easy-to-set up, easy-to-operate home theater system marketed to families in the industry, to home theater speakers, high end DSP A/V amplifiers that incorporate cutting-edge digital technology, and projectors designed exclusively for home theaters. The Company is confident that this sample shipment of YSS942/941 chips will contribute to further increasing the popularity of home theater systems.
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Specifications
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| Power source voltage |
Core 1.2 V, I/O 3.3 V
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| Design Rule |
C-MOS 0.15 micron
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| Working frequency |
180 MHz
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| Type |
32 bit floating point
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| Package |
144LQFP
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| Allowable temperature range |
-40 - +85
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Main ROM successive processing functions
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Left / right tone control, master volume, bass management
Main download code functions:
Surround program DSP (hall, jazz, cinema, etc.), headphone DSP, rear virtual DSP, future format compatibility
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Notes
| 1. |
Home Theater in a Box
A product sold in one package with the surround decoder, multi-channel amplifier, speakers and super woofer that makes it easy to begin experiencing surround sound.
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| 2. |
Dolby Digital, Dolby Digital EX
Commonly used in DVDs, Dolby Digital is a 5.1 channel digital surround format developed by Dolby Laboratories, Inc. Dolby Digital EX expands on Dolby Digital, offering an added rear center channel.
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DTS, DTS-ES
DTS is a 5.1 channel digital surround format used in DVDs developed by Digital Theater Systems, Inc. DTS-ES is a format that expands on DTS, adding a rear center channel.
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Bass Management
A function which controls the distribution of bass output in accordance with the capacity of the speakers in use.
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Dolby Pro Logic, Dolby Pro Logic II
Dolby Pro Logic converts a two channel stereo source into four channels, three front channels and one rear channel. Its upgrade, Dolby Pro Logic II, converts a stereo source into 5.1 channels. The user can choose between "music" and "movie" modes.
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AAC
A 5.1 channel digital surround format established by the Moving Picture Experts Group (MPEG). It is the standard format for BS digital television in Japan.
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DTS 96/24
A 96 kHz compatible 5.1 channel digital surround format developed by Digital Theater Systems, Inc.
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Neo:6
A format to convert a stereo source into 6.1 channels developed by Digital Theater Systems, Inc.
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All product and company names appearing in this text are the registered trademarks of their respective companies.
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For further information, please contact
Yamaha Corporation
Corporate Communication Group,
Public Relations Division
TEL. +81-3- 5488-6601
FAX +81-3-5488-5060
Semiconductor Division, Marketing Group
TEL +81-539- 62-5444
FAX +81-539-62-6036
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