因为要调试CA，看了下CA的文档，英文的，看得头大了。
The DVB Scrambling Algorithm 原来翻译成 DVB加扰算法
看了半天，知道了
TS流和PES流的头的前两位是加扰控制块
Transport_scrambling_control values
Bit values Description
--------------------------------------------------------------
00 No scrambling of TS packet payload (MPEG-2 compliant)
01 Reserved for future DVB use
10 TS packet scrambled with Even Key
11 TS packet scrambled with Odd Key
--------------------------------------------------------------
建议：
1、可以加扰TS流，也可以加扰PES流，但不要两个同时加扰。
2、
3、如果TS包含有部分加扰PES包，就不要再包含填充域，除非又包含有加扰PES包尾。
Recommendation 1: Scrambling shall only occur at one level (TS or PES) and is not allowed to occur
at both levels simultaneously.
Recommendation 2: The header of a scrambled PES packet shall not exceed 184 bytes.
Recommendation 3: The TS packets carrying parts of a scrambled PES packet, shall not have
Adaptation fields with the exception of TS packets containing the end of a PES
packet. The TS packet carrying the end of a scrambled PES packet, may carry
an Adaptation Field to align of the end of the PES packet with the end of the TS
packet.
posted on 2006-04-13 16:26
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