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SDK brings quality sound to Bluetooth audio apps

Posted: 02 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Bluetooth audio products? SOUNDabout Suite SDK? Bluetooth technology?

Renesas Technology Corp. has announced the development of the SOUNDabout Suite as a software development kit (SDK) for microprocessors incorporating a 32bit SuperH Family SH-4A, SH-2A or SH3-DSP CPU core, for the development of high-sound-quality audio products using Bluetooth wireless communication technology.

The SOUNDabout Suite applies the SOUNDabout Bluetooth audio software solution developed by Open Interface North America Inc. (OINA) on Renesas microprocessors, enabling implementation of Bluetooth audio products offering high sound quality.

Renesas has previously introduced OINA's BLUEmagic Bluetooth protocol stack for Bluetooth-capable products, and offers the BLUEmagic 3.0 SDK combining this with a dedicated sample driver program for various Renesas microprocessors.

Now, in response to the market demand for still higher sound quality, Renesas has developed the SOUNDabout Suite featuring OINA's SOUNDabout audio software solution applied to Renesas SuperH Family processors.

Device features
Features of the SOUNDabout Suite kit include:

CD-quality sound: The Bluetooth specification stipulates Subband Codec (SBC) as the standard audio coding method. Use of the SOUNDabout eSBC facility included in the SOUNDabout Suite enables CD-quality sound to be achieved while maintaining SBC compatibility.

Lower system power consumption and costs: BLUEmagic 3.0 and SOUNDabout eSBC included in the SOUNDabout Suite have been developed for embedded systems, and enable the CPU load to be minimized and low-power-consumption products to be created.

Methods of improving sound quality include use of the Advanced Audio Coding (AAC) or Advanced TRansform Acoustic Coding (ATRAC) coding systems, which are optional codecs in the Bluetooth specification. However, AAC and ATRAC processing imposes a heavy load on the CPU, requiring the use of a high-performance microprocessor. In contrast, the eSBC method imposes only a small CPU load, enabling high sound quality to be achieved through processing by an inexpensive microprocessor, and so making it possible to create lower-priced end-products.

Provision of sample programs that help to shorten users' product development times: A host controller interface (HCI) sample driver program, audio sample driver program and sample programs corresponding to profiles established by Bluetooth SIG Inc. are provided, together with the source code, for individual Renesas products.

Shorter development time
By carrying out development based on these programs, a user can easily use a Renesas product as a Bluetooth host, helping to shorten the user's end-product development time. Reference application programs can also be provided for audio reception and handsfree multiprofiles with their particular demands.

Renesas intends to extend the scope of the SOUNDabout Suite software development kit to other Renesas microprocessors, and will continue to expand its lineup of Bluetooth compatible products helping users' product development.

This new SDK will be available starting May 2007 in Japan.

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