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Deep Learning with Hadoop

You're reading from   Deep Learning with Hadoop Distributed Deep Learning with Large-Scale Data

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Product type Paperback
Published in Feb 2017
Publisher Packt
ISBN-13 9781787124769
Length 206 pages
Edition 1st Edition
Languages
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Author (1):
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Dipayan Dev Dipayan Dev
Author Profile Icon Dipayan Dev
Dipayan Dev
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Table of Contents (9) Chapters Close

Preface 1. Introduction to Deep Learning FREE CHAPTER 2. Distributed Deep Learning for Large-Scale Data 3. Convolutional Neural Network 4. Recurrent Neural Network 5. Restricted Boltzmann Machines 6. Autoencoders 7. Miscellaneous Deep Learning Operations using Hadoop 1. References

Distributed video decoding in Hadoop


Most of the popular video compression formats, such as MPEG-2 and MPEG-4, follow a hierarchical structure in the bit-stream. In this subsection, we will assume that the compression format used has a hierarchical structure for its bit-stream. For simplicity, we have divided the decoding task into two different Map-reduce jobs:

  1. Extraction of video sequence level information: From the outset, it can be easily predicted that the header information of all the video dataset can be found in the first block of the dataset. In this phase, the aim of the map-reduce job is to collect the sequence level information from the first block of the video dataset and output the result as a text file in the HDFS. The sequence header information is needed to set the format for the decoder object.

    For the video files, a new FileInputFormat should be implemented with its own record reader. Each record reader will then provide a <key, value> pair in this format to each...

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