发明名称 |
IMPROVEMENTS IN OR RELATING TO MODIFYING A DIGITAL BITSTREAM |
摘要 |
This invention relates to improvements in controlling the decoder buffer occupancy, particularly in relation to, but not exclusively to, switching betwee n compressed bitstreams. This invention provides a method of modifying a digital bitstream 11 to be transmitted through a decoder 14 having a buffer 15. An expected level of buffer occupancy is determined for a point in the digital bitstream 11 and the digital bitstream 11 is modified at that point to change the buffer occupancy to a second level. The second level may be determined from a second digital bitstream 12. One advantage of this method is that the occupancy of the buffer 15 can be adjusted to match the buffer requirements of the second bitstream 12 before switching to the second bitstream 12. The invention provides method and apparatus for improving the decoder buffer management during switching between bitstreams. |
申请公布号 |
CA2234010(A1) |
申请公布日期 |
1998.10.07 |
申请号 |
CA19982234010 |
申请日期 |
1998.04.06 |
申请人 |
NDS LIMITED |
发明人 |
BOCK, ALOIS MARTIN;JORDAN, JONATHAN PAUL |
分类号 |
H04N7/26;H04N7/24;H04N7/32;H04N7/52;(IPC1-7):H03M7/00;H04N7/12 |
主分类号 |
H04N7/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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