Decoding device and method

A decoding device and decoding technology are applied in the field of decoding devices and decoding, and can solve the problems of synchronization code pseudo-synchronization and synchronization deviation, deviation, synchronization code error detection pseudo-synchronization and synchronization, etc.

Inactive Publication Date: 2007-02-14
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The main purpose of the present invention is to provide an encoding device and a decoding device that can solve the problems of false synchronization and synchronization deviation caused by misdetection of synchronization codes
[0018] A more specific object of the present invention is to provide an en

Method used

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  • Decoding device and method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0095] figure 1 It represents the moving image coding that combines the coding device having the error correction / detection code switching function of the present invention with a high-efficiency compression coding device that uses motion compensation adaptive prediction and orthogonal transform coding, that is, discrete cosine transform coding. Block diagram of Example 1 of the device. Regarding the encoding method combining adaptive prediction with motion compensation and discrete cosine transform encoding, for example, there are detailed descriptions in Document 1: Edited by Hiroshi Yasuda, "International Standards for Symbolization of Malchi Media", Maruzen, (June 2013), etc. Note, therefore, only an overview of the action is described here. In addition, the error correction / detection codes used in this embodiment are codes separated into information bits and check bits like BCH codes.

[0096] exist figure 1In this method, the input moving image signal 131 to be code...

Embodiment 2

[0171] Below, refer to Figure 12 to Figure 14 Example 2 of the present invention will be described. Even if the moving image encoding device and moving image decoding device of the present embodiment use a transmission path / storage medium in which a part of a bit sequence is eliminated to reduce the number of bits or add extra bits to increase the number of bits, the code sequence is transmitted / stored. , can also be reliably detected synchronously.

[0172] Figure 12 It is a block diagram showing the principle of the synchronization detection processing at the time of such bit addition / deletion. here, as Figure 12 As shown in (a), the correct synchronization code is composed of "0" of sync_0_len bit and "1" of 1 bit. Figure 12 The "×" in is a bit other than the synchronization code.

[0173] Figure 12 (b) to (e) show how the synchronization code changes due to bit addition / deletion. Here, the number of bits (Nid) to be added / disappeared is 1 bit at most. (b) is a...

Embodiment 3

[0221] Next, Embodiment 3 of the present invention will be described. The difference between this embodiment and Embodiment 1 and Embodiment 2 is that no error correction / detection code is used.

[0222] Figure 18 It is a block diagram of the video coding apparatus of this embodiment. right with figure 1 Corresponding parts are denoted by the same symbols and will be described focusing on differences from Embodiment 1. In this embodiment, the structure and operation of the output encoding device 200 are different. In addition, the basic actions of multiplexer 111 and figure 1 The multiplexer 111 is the same, however, as the error correction / detection code is not used, only the multiplexed code string 201 and the synchronous code insertion request signal 203 are output.

[0223] Figure 19 yes means Figure 18 A block diagram of the structure of the output encoding device 200 in FIG. The output encoding device 200 is composed of a counter 1701 for counting the number ...

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Abstract

In a coding system wherein an error correction/detection coding is combined with a synchronization recovering technique using a synchronization code, the problems of a pseudo synchronization and a step out due to error detection are solved. There is provided a coding part 212 for coding an input multiplexed-code string 201 to an error correcting-/detecting code comprising an information bit and a check bit, and code string assembling part 213 for inserting a synchronization code into any one of a plurality of periodically predetermined synchronization code inserting positions in the code string 201, for arranging the information bit at an optional position in the code string, and for arranging the check bit at a position other than the synchronization code inserting positions in the code string 201 to assemble an output code string 205.

Description

[0001] This application is a divisional application of the Chinese patent application with the application number 97193909.8 and the title of the invention "encoding device and decoding device" submitted by the same applicant on March 18, 1997. technical field [0002] The present invention relates to a system for transmitting / storing information through a medium with a high bit error rate such as a wireless transmission line, and a decoding device for performing error correction / detection coding on a compressed code string obtained by high-efficiency compression coding and transmitting / storing it / decoding method. Background technique [0003] For example, as in wireless television (TV) telephones, portable information terminals, and digital TV broadcasting systems, it is necessary to efficiently compress and encode and transmit through wireless transmission lines to reduce image and sound information to as little information as possible. In the system, due to the high bit ...

Claims

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Application Information

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IPC IPC(8): H04L7/08H04N7/64H04L1/00H03M7/30H04N19/89
Inventor 菊地义浩渡边敏明驮竹健志中条健永井刚
Owner KK TOSHIBA
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