发明授权
US07561079B2 Method and apparatus for encoding a bytestream in a communication device 有权
用于在通信设备中编码字节流的方法和装置

  • 专利标题: Method and apparatus for encoding a bytestream in a communication device
  • 专利标题(中): 用于在通信设备中编码字节流的方法和装置
  • 申请号: US11961170
    申请日: 2007-12-20
  • 公开(公告)号: US07561079B2
    公开(公告)日: 2009-07-14
  • 发明人: Zhong Hai Luo
  • 申请人: Zhong Hai Luo
  • 申请人地址: CA Waterloo, Ontario
  • 专利权人: Research In Motion Limited
  • 当前专利权人: Research In Motion Limited
  • 当前专利权人地址: CA Waterloo, Ontario
  • 主分类号: H03M7/02
  • IPC分类号: H03M7/02
Method and apparatus for encoding a bytestream in a communication device
摘要:
A method and apparatus for data encoding such as 3 to 4 encoding (base64, uuencode etc.) is provided. Bytes of data to be encoded having negative values are made positive while preserving the information to be encoded. The positive values may be manipulated by addition (e.g. to a common store) and bit shifting to efficiently obtain encoded data such as by indexing an encoding alphabet.
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