A low-power DSP core architecture for low bitrate speech codec

A low-power programmable DSP core architecture for 3G mobile terminals

We have developed a new-generation, general-purpose digital signal processor (DSP) core with low power dissipation for use in third-generation (3G) mobile terminals. The DSP core employs a 4-way VLIW (very long instruction word) approach, as well as a dual-multiply-accumulate (dual-MAC) architecture with good orthogonality. It is able to perform both video and speech codec for 3G wireless commu...

Ultra-Low-Energy DSP Processor Design for Many-Core Parallel Applications

Background and Objectives: Digital signal processors are widely used in energy constrained applications in which battery lifetime is a critical concern. Accordingly, designing ultra-low-energy processors is a major concern. In this work and in the first step, we propose a sub-threshold DSP processor. Methods: As our baseline architecture, we use a modified version of an existing ultra-low-power...

Low-Power Implementation of H.324 Audiovisual Codec Dedicated to Mobile Computing

A VLSI implementation of the H.324 audiovisual codec is described. A number of sophisticated low-power architectures have been devised dedicatedly for the mobile use. A set of specific functional units, each corresponding to a process of H.263 video codec, is employed to lighten different performance bottlenecks. A compact DSP core composed of two MAC units is used for both ACELP and MP-MLQ cod...

Bitrate Scalable Speech Codec for IP Telephony and IP Broadcast Applications

Emergence of Internet Telephony has presented new challenges and opportunities in Speech Codec design and Development. Key challenges are quality of speech, usage of available low cost DSP/ARM and inbuilt error resilience. For instance, bandwidth of Internet connection is a non stationary parameter and thus the same is expected to vary over time. Devices connected to such a network need to acco...

Low power showdown: comparison of five DSP platforms implementing an LPC speech codec