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Decoder/processor chip aimed at analog and digital TV

Posted: 11 Jan 2006 ?? ?Print Version ?Bookmark and Share

Keywords:STV82x8? decoder/processor chip? digital audio? STMicroelectronics? multi-channel television sound?

STMicroelectronics (ST) announced a new family of digital audio decoder/processor chips designed for analog and digital TV sets, and video recorders, at all price levels, which receive multi-channel television sound (or BTSC for the Broadcast Television Systems Committee that created it) and digital multi-channel sound. According to the company, each member of the STV82x8 family is a single-chip solution that provides the resources needed to detect, decode and process analog audio transmissions or digital sources with multi-channel content, and to drive a range of loudspeakers from enhanced stereo up to full 5.1 surround sound.

The STV82x8 devices are intended for analog, digitized and digital TV sets in the BTSC markets, which include the United States, Canada, Mexico, Taiwan, Brazil and the Philippines. The product family provides a range of audio processing options, with separate processing of headphone and loudspeaker channels, including Dolby Pro Logic I and Dolby Pro Logic II for full multi-channel environments. ST's royalty-free processing algorithms, which eliminate the need for costly third-party processing, include ST Widesurround, ST Omnisurround (which is Virtual Dolby Surround and Virtual Dolby Digital compliant), ST Dynamic Bass and ST Voice. An embedded sample rate converter allows all data to be processed at 48kHz.

Enhancement technologies include SRS WOW and SRS TruSurround XT, with smart volume control (SVC), 5-band equalizer, and loudness control on loudspeaker signals. The independent headphone processors include SVC, bass, treble, loudness, ST Dynamic Bass and SRS TruBass. Meanwhile, the three I2S (Inter IC Sound) inputs enable Dolby Digital data from an MPEG-2 HD decoder to be accepted and processed, allowing certification of the Virtual Dolby Digital function at TV set level.

Additionally, the analog audio matrix controls four or five (depending on package size) analog audio inputs and three stereo outputs, with pass-thru options, in addition to the main decoded signals. Independent lip-sync delay is provided for loudspeaker and headphone channels, with support for additional external delay in the larger 100-pin package.

Devices from the basic STV8218 up to the fully featured STV8288FDSX are available in the 14-by-14mm TQFP80 package, priced from $5 to $7, depending on options. The TQFP100 package will be available later.

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