| 摘要 |
A high-speed bit assignment method for audio signal is disclosed. The Method is usable by various systems using encoding and decoding, capable of reducing bit assignment time in a compressing method using a psychological acoustic model, increasing a bit assignment ratio by using a maximum possible bit, and facilitating high-speed processing. The present invention includes a first step which obtains a total assignment possible bit number available to bit assignment of each channel using a signal-to-noise ratio from a psychological acoustic model and obtains an effective assignment bit number assigning the total assignment possible bit number to a sub-band of one channel in response to a sub-band of a multi-channel; a second step which compares the total assignment possible bit number and the effective assignment bit number from the first step; and a third step which obtains a second effective assignment bit number when the effective assignment bit number from the first step is larger than the total assignment possible bit number, whereby when the high efficiency of the bit assignment is increased and when the support data region of the variable length is used, 100% of the total bit number needed to produce the bit stream of one frame is available, so that high speed processing can be secured. |
