Channel Coding for DTTB System
Abstract
The DTTB system is aimed at delivering digital video programs reliably over the air to user terminals. This chapter introduces the channel coding for DTTB systems with an emphasis on the basic coding concepts and important conclusions for DTTB system design. Error control methods can be divided into two types. One is with feedback, including automatic repeat request (ARQ), information repeat request (IRQ), and hybrid error correction (HEC). Linear block code based on a well-established theory has very clear mathematical structure and has been widely adopted. Under the same code rate and complexity, convolutional codes in general outperform block codes by fully taking the advantage of correlations among codewords. Parallel code is another combination using short codes to form a long code. The chapter also introduces trellis-coded modulation (TCM) technology by combining coding and modulation, with the signal space partition optimized based on the maximum Euclidean distance criterion.
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Unlike ARQ, FEC restores errors without requesting retransmission, so when transmission delay matters, FEC may be quicker and more suitable.
“Unlike Automatic Repeat Request (ARQ), when an error is detected within the transmitted data, FEC restores it without requesting re-transmission. Thus, when transmission delay matters, FEC may be a quicker and more suitable option to choose [9].”
From VQProtect: Lightweight Visual Quality Protection for Error-Prone Selectively Encrypted Video Streaming (2022) · cites this paper as [9]
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Gillani, S. M., Asghar, M. N., Shifa, A., Abdullah, S., Kanwal, N., & Fleury, M. (2022) · Entropy · doi:10.3390/e24060755 · Cited by 5 · see citing works
- Authors
- Song, J. J., Yang, Z., & Wang, J.
- Venue
- Digital Terrestrial Television Broadcasting
- Publisher
- Wiley
- Published
- 2015-07-10
- Pages
- 69-112
- OpenAlex
- W2488369812
- Cited by
- 0
- References
- 0
- Type
- other
- Language
- en
- Open access
- closed
- Topics
- Physical Sciences › Computer Science › Computer Networks and Communications › Error Correcting Code Techniques
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Wireless Communication Techniques
- Physical Sciences › Computer Science › Artificial Intelligence › Coding theory and cryptography
- Keywords
- digital terrestrial television, channel coding, automatic repeat request, hybrid error correction, linear codes, convolutional codes, parallel code, trellis coded modulation
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