JP2000224136A5

JP2000224136A5 -

Info

Publication number: JP2000224136A5
Application number: JP1999023861A
Authority: JP
Filing date: 1999-02-01
Publication date: 2004-12-24
Anticipated expiration: 2019-02-01

Description

【００１０】
更に、他の例を示す。

上記の例はいずれの場合も、レート変換比が、２１以下の整数同士で表され、かつ、当該整数同士の差が４以内となる簡単な比率で表されるため、入力されるクロックＣＫｉから、容易にクロックＣＫｔを作成できる。
なお受信側は、受信情報から作成した伝送クロックＣＫｒから、主データＤｉのクロックＣＫｔを作成できる。
素子の進歩により一概には結論できないが、データ速度が４０Ｍｂｐｓを越えると上記処理に用いる各種ディジタル素子の動作が速度的に厳しくなる。
従って、レート変換後の速度が４０Ｍｂｐｓ以下で、多くの付加データを割り当てられ、かつ簡単な比率となる、２０４：２３８＝６：７の３７．９Ｍｂｐｓのモードは最適である。[0010]
Furthermore, another example is shown.

In any of the above examples, the rate conversion ratio is represented by integers of 21 or less, and is represented by a simple ratio such that the difference between the integers is 4 or less. , Can easily create a clock CKt.
The receiving side can create the clock CKt of the main data Di from the transmission clock CKr created from the received information.
Although advances in devices can not be generally concluded, when the data rate exceeds 40 Mbps, the operation of various digital devices used for the above processing becomes severe in speed.
Therefore, the mode of 37.9 Mbps with 204: 238 = 6: 7, which has a rate conversion rate of 40 Mbps or less, can allocate a lot of additional data, and has a simple ratio, is optimal.

Claims

When transmitting main data having a data stream configuration in a predetermined packet unit, on the transmitting side, the main data, auxiliary data related to the main data having at least a predetermined number of words, and a code for synchronous extraction, It has means for converting and multiplexing a predetermined rate so that the packet cycle becomes the same as the cycle, and transmitting the transmission data stream generated by the multiplexing, and the receiving side receives the original main data from the received transmission data stream And means for separating and decoding the auxiliary data.

2. The apparatus according to claim 1, wherein 12 to 51 words of the auxiliary data, the synchronization extraction code and the error correction code are multiplexed per 204 words of the main data packet unit. Rate conversion is performed by (the number of words forming the packet unit of the transmission data stream) / (204 words forming the packet unit of the main data) times, and the ratio of the number of words is an integer of 21 or less The data transmission system is characterized in that it is a value represented by a numerical value that is represented by each other and the difference between the integers is within four .

2. The method according to claim 1, wherein 12 words of the auxiliary data, 2 words of the synchronization extraction code and 20 words of an error correction code are multiplexed per 204 words of the main data packet unit. The predetermined rate conversion is performed at 7/6 times, and the actual data rate of the transmission data stream is 40 Mbps or less, and the actual data rate of the auxiliary data is 1.536 Mbps or more. Data transmission system.

2. The apparatus according to claim 1, wherein 11 to 34 words of the auxiliary data, the synchronization extraction code, and the error correction code are multiplexed per 187 words of the main data packet unit. Rate conversion, ( The number of words that make up the packet unit of the above transmission data stream ) / (187 words forming the packet unit of the above main data) is assumed to be doubled, and the ratio of the number of words is represented by integers of 18 or less and represented by a numerical value such that the difference between the integers is within 2 Data transmission system characterized in that

In Claim 1, 16 to 47 words of the auxiliary data, the synchronization extraction code, and the error correction code are multiplexed per 188 words constituting the packet unit of the main data. A data transmission system characterized in that rate conversion is performed at either 51/47 times or 5/4 times.