IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.

IP videophone is the comprehensive application of multiple technologies, including such technologies as design of Graphic User Interface, audio capture, audio coding, video capture, video coding and their transmission on network.

IP视频电话是多种技术的综合运用。包括GUI设计、语音采集播放、语音压缩编码、视频采集，对视频进行压缩编码以及网络传输等。

Under this background, we designed the Videophone terminal based on the DSP. The terminal has the IP videophone function and standard PSTN telephone function at the same time.

在这种背景下，我们设计了这款支持H.323协议基于DSP的IP可视电话终端。

Finally, applying PPPoE to IP videophone realizes the embedded system communication in broadband access mode.

文中最后给出PPPoE的个典型应用实例IP可视电话，将PPPoE应用在IP可视电话中，实现了嵌入式多媒体终端的宽带接入。

Therefore, the IP Videophone will become an inevitable trend of information development as the representative communications.

所以作为代表可视电话的视频通信将成为信息社会发展的必然趋势。与此同时3G的发展将提供新的动力促进IP可视电话的发展。

Development of IP Videophone Terminal Based on DSP

基于DSP的IP可视电话终端开发

Mum has put a veto on our watching television for more than two hours an evening.

妈妈已经禁止我们每晚看电视超过两小时。

The old man put a veto on soccer in his garden.

老人禁止在他的花园里踢足球。

No, that's just the sound of massive piles of cash being moved-the vast sums of money that Uber and its Chinese rival Didi Chuxing are stockpiling for their battle to own the global ride-hailing market.

非也。那不过是两大堆资金挪动的声音，更准确点说是优步及其中国竞争对手滴滴出行为争夺全球叫车服务市场筹集巨款。

Although television on demand has not yet become a mainstream activity in the UK, the BBC, ITV and Channel 4 have all invested vast sums of money in technology which enables viewers to watch their favourite shows on their computers.

尽管电视在线点播在英国仍未成为一种主流模式，但BBC、ITV和Channel4已投入大量资金研发能让观众在电脑上看他们喜爱的电视节目的技术。

The coming year of the dragon will bring actor Al Pacino good fortune, but Russian Prime Minister Vladimir Putin needs to watch out-he may lose vast sums of money.

即将到来的龙年将带给演员阿尔帕西诺好运，但俄罗斯总理弗拉基米尔普京则需当心他可能会损失一大笔钱。

From the shape and color of razor blades to latest model sports car, vast sums of money and effort are spent to give physical matter the "right" form for consumption.

从剃须刀的颜色与形状到最新款式的跑车，巨大的资金与人力被投入进去，为了给物质对象赋予“正确”的形式（色），可供人们消费。

Soros is clearly genuinely appalled at the damage wrought on vulnerable economies by the vast sums of money which flow across national borders every day.

很明显，对于每天在各国之间流动的大量资金给经济脆弱国家造成的伤害，索罗斯从心底感到震惊。

Governments around the world, including here in Asia, have spent vast sums of money in shielding their economies from the worst of the global financial crisis.

世界各国政府，包括亚洲在内，已经投入了大量资金防止其经济走向全球金融危机的最坏境地。

The pressure mounts steadily: with US interest rates down at 2 per cent, China is now losing vast sums of money on its foreign exchange reserves.

压力在稳步上升：随着美国利率降至2%，中国的外汇储备目前正蒙受庞大损失。

The federal government spends vast sums of money each year on grants, benefits, and the procurement of goods and services.

联邦政府每年在授予拨款、福利、采购物资和提供服务上用去大量经费。

Um, world-wide vast sums of money are spent on sports, mostly I think with the aim of winning.

全世界在体育运动方面花费大量的金钱，我想大部分都是花在胜利的目标上.

Reversing the devastation of our planet will require a massive international effort and vast sums of money.

扭转对我们星球的破坏要求付出大规模的国际努力和巨额的金钱。

That is why they cannot help but spend vast sums of money on cosmetics and fashionable clothing.

那就是为何她们会忍不住将大笔金钱花在化妆品和流行服饰上的原因。

Many women spend vast sums of money each year to replace clothes that have hardly been worn.

一些女人每年花费许多的金钱来置换那些她们几乎没穿越的衣服。

And being paid vast sums of money?

恰成鲜明对比是吧？