As dedicated voice (or data) channels are setup by phones, the bandwidth available for packet switched data shrinks.

如热衷的声音(或数据)，频道是电话的装备，小包可用的带宽转变了数据收缩。

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This paper proposes a new method in integrated transmission of voice and data. This method increases the utilization ratio of the bandwidth.

该文提出的语音与数据综合传输新方法能有效地提高网络带宽利用率。

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But video poses real challenges, as it consumes considerably more bandwidth than both voice and data, and video quality degrades substantially, often unacceptably, when network congestion interrupts or delays individual packets in traffic streams.

FORBES: Bridging The Data Deluge Gap

Those services require high-bandwidth, expensive systems and don't deliver as much revenue per bit of data as voice or Internet service.

FORBES: Qualcomm's Field Of Streams