Adaptive GOP structure selection for real-time MPEG-2 video encoding

Yokoyama, Yutaka

doi:10.1109/icip.2000.899838

Cited by 17 publications

(11 citation statements)

References 4 publications

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“…Similar techniques have been introduced in the context of MPEG and H.26X. [12][13][14][15] In Figure 1 this approach is examined where differential frames are calculated and then examined, utilizing parameters which indicate high or low motion. Those "indicators" help to decide whether to code the current frame as a differential frame (little or no motion present) or as an Intraframe (high motion content).…”

Section: Software Systemmentioning

confidence: 99%

Hardware-based JPEG 2000 video coding system

Schuchter

Uhl

2007

Real-Time Image Processing 2007

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In this paper, we discuss a hardware based low complexity JPEG 2000 video coding system. The hardware system is based on a software simulation system, where temporal redundancy is exploited by coding of differential frames which are arranged in an adaptive GOP structure whereby the GOP structure itself is determined by statistical analysis of differential frames. We present a hardware video coding architecture which applies this inter-frame coding system to a Digital Signal Processor (DSP). The system consists mainly of a microprocessor (ADSP-BF533 Blackfin Processor) and a JPEG 2000 chip (ADV202).

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Section: Software Systemmentioning

confidence: 99%

Hardware-based JPEG 2000 video coding system

Schuchter

Uhl

2007

Real-Time Image Processing 2007

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“…Basically, GOP breaks the inter-dependencies of frame sequences in the sense that a frame in a given GOP has no dependency on any frame in other GOPs. Furthermore, although the I-P-B pattern in GOPs in an encoded MPEG stream is not necessarily fixed, in practice, this pattern has a fixed format [29], which is determined at the encoding time [30]. In our view, this GOP is at the appropriate level of granularity for the DTM task because: 1) In an MPEG stream, although the decoding workloads for P and B frame types varies widely (cf.…”

Section: E Observations About Mpeg-2 Decodingmentioning

confidence: 99%

GOP-Level Dynamic Thermal Management in MPEG-2 Decoding

Lee

Patel

Pedram

2008

IEEE Trans. VLSI Syst.

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In this paper, we present a dynamic thermal management (DTM) algorithm based on: 1) accurate estimation of the workload of frames in a group of pictures (GOP) in an MPEG-2 video stream and 2) slack borrowing across the GOP frames in order to achieve a thermally safe state of operation in microprocessors during the video decoding process. The proposed DTM algorithm employs dynamic voltage and frequency scaling (DVFS) while considering the frame-rate-dependent GOP deadline, variance of the frame decoding times within the GOP, and a maximum chip temperature constraint. If it becomes necessary to sacrifice video quality or violate the GOP deadline due to a low temperature bound, then the (intra-frame) spatial quality degradation and the (inter-frame) temporal quality degradation will be applied to the GOP. Experimental results demonstrate the competence and efficiency of the proposed online DTM algorithm.Index Terms-Dynamic thermal management (DTM), dynamic voltage and frequency scaling (DVFS), group of pictures (GOP), MPEG-2 decoding, quality degradation.

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“…In the interframe baseline video coding system [9] an adaptive GOP structure is used which is based on the analysis of differential frames (adaptive GOP schemes have been suggested for DCT-based schemes as well [6], [11]). The coding engine to compress intraframes and interframes is JPEG2000.…”

Section: Software Systemmentioning

confidence: 99%

Embedded Low Complexity JPEG2000 Videocoding System

Schuchter

Uhl

2007

2007 IEEE/ACM/IFIP Workshop on Embedded Systems for Real-Time Multimedia

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In this paper, we discuss an embedded hardware low complexity JPEG2000 video coding system. The hardware implementation is based on a software simulation system, where temporal redundancy is exploited by coding of differential frames which are arranged in an adaptive GOP structure. The hardware used mainly consists of a microprocessor (Analog Devices ADSP-BF533 Blackfin Processor) and a JPEG2000 chip (ADV202). DMAs (Direct Memory Access) are introduced to optimize memory transfers in the system. It is shown that Memory to Memory DMAs lead to significant improvement in our proposed memory structure resulting in better performance.

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Adaptive GOP structure selection for real-time MPEG-2 video encoding

Cited by 17 publications

References 4 publications

Hardware-based JPEG 2000 video coding system

Hardware-based JPEG 2000 video coding system

GOP-Level Dynamic Thermal Management in MPEG-2 Decoding

Embedded Low Complexity JPEG2000 Videocoding System

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